Toyota Avalon (XX50): Linear Solenoid Valve Offset Learning undone (C1345,C1368). Pressure Holding Solenoid Valve Learning Undone (C1349,C134A). Increasing Pressure Solenoid (FR) (C1352-C1359)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System(for Hv Model) / Linear Solenoid Valve Offset Learning undone (C1345,C1368). Pressure Holding Solenoid Valve Learning Undone (C1349,C134A). Increasing Pressure Solenoid (FR) (C1352-C1359)

Linear Solenoid Valve Offset Learning undone (C1345,C1368)

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) stores the individual characteristics of each linear solenoid built into the brake booster with master cylinder assembly. Based on the stored information, the skid control ECU (brake booster with master cylinder assembly) calibrates the individual differences and controls systems.

The skid control ECU (brake booster with master cylinder assembly) receives the shift position P signal from the hybrid vehicle control ECU through the CAN communication system.

These DTCs are cleared when the linear solenoid valve offset learning results are normal.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1345

Linear Solenoid Valve Offset Learning undone

1133

The linear solenoid valve offset learning value is not stored.

Perform linear solenoid valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.

Only DTC C1345 (INF code 1133) is stored: Does not come on

SAE Code C1345 is stored: Comes on
  • INF Code 1133: SAE Code C1345
  • Electronically controlled brake system DTC

C1368

Linear Solenoid Valve Offset

1134

The linear solenoid valve offset learning value cannot be obtained.
  • Perform linear solenoid valve offset learning and check for DTCs. If no DTCs are output again, the valve is normal.
  • Skid control ECU (brake booster with master cylinder assembly)

Does not come on

Electronically controlled brake system DTC

MONITOR DESCRIPTION

SAE Code C1345:
  • After any of the following situations, if the learning value of the linear solenoid (SLA) or linear solenoid (SLR) is not stored and the vehicle is being driven at a certain speed or more, the skid control ECU (brake booster with master cylinder assembly) judges that the offset learning of the linear solenoid valve is not performed and illuminates the MIL and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.
C1345 (INF Code 1133):
  • After any of the following situations, if learning of the linear solenoid (SLA) or linear solenoid (SLR) has not been performed, or learning has been performed but no learning value was stored, the skid control ECU (brake booster with master cylinder assembly) judges that the offset learning of the linear solenoid valve is not performed and illuminates the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights, blinks* the brake hold operated indicator light and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.

      HINT:

      • *: The brake hold switch (electric parking brake switch assembly) is turned on under the following vehicle conditions.
        • Vehicle Conditions:
          1. The driver side door is closed.
          2. The driver side seat belt is fastened.
      • As the detection conditions slightly differ from SAE code C1345, the detection conditions for DTC C1345 (INF code 1133) is also provided.

MONITOR STRATEGY

HINT:

SAE code only.

C1345

Related DTCs

C1345: Linear solenoid open current learning not complete

Required Sensors/Components(Main)

Skid control ECU (brake booster with master cylinder assembly)

Required Sensors/Components(Related)

Speed sensor

Frequency of Operation

Continuous

Duration

-

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

HINT:

SAE code only.

C1345

Monitor runs whenever the following DTCs are not stored

None

Vehicle speed

40 km/h (25 mph) or more

TYPICAL MALFUNCTION THRESHOLDS

HINT:

SAE code only.

C1345

Either of the following conditions is met

-

Linear solenoid (SLA) open current learning value

Not stored

Linear solenoid (SLR) open current learning value

Not stored

COMPONENT OPERATING RANGE

HINT:

SAE code only.

C1345

Both of the following conditions are met

-

Linear solenoid (SLA) open current learning value

Stored

Linear solenoid (SLR) open current learning value

Stored

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Drive the vehicle at a speed of 40 km/h (25 mph) or more for 1 second.
  9. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
  10. Read the DTCs.

    HINT:

    • If a DTC is output, the system is malfunctioning.
    • If a DTC is not output, perform the following procedure.
  11. If the DTCs are not output, perform a universal trip and check for permanent DTCs.

    Click here

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTCs are output, the system is normal.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly), perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

HINT:

Before performing linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization, DTC C1203 will be output.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check that DTCs other than C1345, C1349 and C1392 are not output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

OK:

DTCs other than C1345, C1349 and C1392 are not output.

NG

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

OK

2.

PERFORM AIR BLEEDING

(a) Perform the air bleeding procedure in Bleed Brake System.

Click here

NEXT

3.

PERFORM LINEAR SOLENOID VALVE OFFSET LEARNING

(a) Turn the power switch off.

(b) Check and ensure the following conditions required for performing linear solenoid valve offset learning and then perform linear solenoid valve offset learning.

Click here

Chassis > ABS/VSC/TRAC > Utility

Tester Display

ECB Utility
  1. The auxiliary battery voltage is 11 to 15.5 V when the power switch is on (READY).
  2. The brake actuator (brake booster with master cylinder assembly) is not hot.
  3. The hybrid control system is not malfunctioning.
  4. The shift state indicator shows that the shift lever is in P.
  5. The READY light in the combination meter assembly is illuminated.
  6. The brake pedal is not depressed.
  7. The parking brake is released.
  8. DTC C1451 (Motor Drive Permission Malfunction) is not output. (If it is output, bleed the air from the high-pressure tube.)
NEXT

4.

RECONFIRM DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs C1345 and C1368 are not output.

A

DTCs C1345 and/or C1368 are output.

B
A

END
B

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

Pressure Holding Solenoid Valve Learning Undone (C1349,C134A)

DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) stores the individual characteristic of each holding solenoid built into the brake actuator assembly. Based on the stored information, the skid control ECU (brake booster with master cylinder assembly) calibrates the individual differences and controls systems.

The skid control ECU (brake booster with master cylinder assembly) receives the shift position P signal from the hybrid vehicle control ECU through the CAN communication system.

These DTCs are cleared when the ABS holding solenoid valve learning results are normal.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1349

Pressure Holding Solenoid Valve Learning Undone

1155

The ABS holding solenoid valve learning value is not stored.

Perform ABS holding solenoid valve learning and check for DTCs. If no DTCs are output again, the valve is normal.

Only DTC C1349 (INF code 1155) is stored: Does not come on

SAE Code C1349 is stored: Comes on
  • INF Code 1155: SAE Code C1349
  • Electronically controlled brake system DTC

C134A

Pressure Holding Solenoid Valve Learning Malfunction

1156

The ABS holding solenoid valve learning value cannot be obtained.
  • Perform ABS holding solenoid valve learning and check for DTCs. If no DTCs are output again, the valve is normal.
  • Skid control ECU (brake booster with master cylinder assembly)
  • Brake actuator assembly

Does not come on

Electronically controlled brake system DTC

MONITOR DESCRIPTION

SAE Code C1349:
  • After any of the following situations, if learning of the ABS holding solenoid for one wheel or more is not stored and the vehicle is being driven at a certain speed or more, the skid control ECU (brake booster with master cylinder assembly) judges that the learning of the ABS holding solenoid valve is not performed and illuminates the MIL and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.
C1349 (INF Code 1155):
  • After any of the following situations, if learning of the ABS holding solenoid for one wheel or more has not been performed, or learning has been performed but no learning value was stored, the skid control ECU (brake booster with master cylinder assembly) judges that the learning of the ABS holding solenoid valve is not performed and illuminates the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indicator lights, blinks* the brake hold operated indicator light and stores this DTC.
    1. The skid control ECU (brake booster with master cylinder assembly) has been replaced with a new one.
    2. After the brake actuator assembly, brake pedal stroke sensor assembly or brake pedal is removed and installed or replaced, the zero point is cleared.

      HINT:

      • *: The brake hold switch (electric parking brake switch assembly) is turned on under the following vehicle conditions.
        • Vehicle Conditions:
          1. The driver side door is closed.
          2. The driver side seat belt is fastened.
      • As the detection conditions slightly differ from SAE code C1349, the detection conditions for DTC C1349 (INF code 1155) is also provided.

MONITOR STRATEGY

HINT:

SAE code only.

C1349

Related DTCs

C1349: ABS holding solenoid open current learning not complete

Required Sensors/Components(Main)

Skid control ECU (brake booster with master cylinder assembly)

Required Sensors/Components(Related)

Speed sensor

Frequency of Operation

Continuous

Duration

-

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

HINT:

SAE code only.

C1349

Monitor runs whenever the following DTCs are not stored

None

Vehicle speed

40 km/h (25 mph) or more

TYPICAL MALFUNCTION THRESHOLDS

HINT:

SAE code only.

C1349

ABS holding solenoid open current learning value

Not stored for 1 or more wheels

COMPONENT OPERATING RANGE

HINT:

SAE code only.

C1349

ABS holding solenoid open current learning value

Stored for 4 wheels

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Drive the vehicle at a speed of 40 km/h (25 mph) or more for 1 second.
  9. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
  10. Read the DTCs.

    HINT:

    • If a DTC is output, the system is malfunctioning.
    • If a DTC is not output, perform the following procedure.
  11. If the DTCs are not output, perform a universal trip and check for permanent DTCs.

    Click here

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTCs are output, the system is normal.

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

HINT:

Before performing linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization, DTC C1203 will be output.

PROCEDURE

1.

CHECK DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check that DTCs other than C1345, C1349 and C1392 are not output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

OK:

DTCs other than C1345, C1349 and C1392 are not output.

NG

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

OK

2.

PERFORM AIR BLEEDING

(a) Perform the air bleeding procedure in Bleed Brake System.

Click here

NEXT

3.

PERFORM ABS HOLDING SOLENOID VALVE LEARNING

(a) Turn the power switch off.

(b) Check and ensure the following conditions required for performing ABS holding solenoid valve learning and then perform ABS holding solenoid valve learning.

Click here

Chassis > ABS/VSC/TRAC > Utility

Tester Display

ECB Utility
  1. The auxiliary battery voltage is 11 to 15.5 V when the power switch is on (READY).
  2. The brake actuator assembly is not hot.
  3. The hybrid control system is not malfunctioning.
  4. The shift state indicator shows that the shift lever is in P.
  5. The READY light in the combination meter assembly is illuminated.
  6. The brake pedal is not depressed.
  7. The parking brake is released.

NOTICE:

Learning will be performed in the order of linear solenoid valve offset learning and then ABS holding solenoid valve learning.

NEXT

4.

RECONFIRM DTC

(a) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(b) Turn the power switch off.

(c) Turn the power switch on (IG).

(d) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs C1349 and C134A are not output.

A

DTCs C1349 and/or C134A are output.

B
A

END
B

5.

PERFORM ACTIVE TEST USING TECHSTREAM (ABS SOLENOID)

(a) Select the Active Test on the Techstream.

Click here

Chassis > ABS/VSC/TRAC > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

ABS Solenoid (SRLH)

Holding solenoid valve (RLH)

Solenoid ON/OFF

-

ABS Solenoid (SRRH)

Holding solenoid valve (RRH)

Solenoid ON/OFF

-

ABS Solenoid (SFLH)

Holding solenoid valve (FLH)

Solenoid ON/OFF

-

ABS Solenoid (SFRH)

Holding solenoid valve (FRH)

Solenoid ON/OFF

-
Chassis > ABS/VSC/TRAC > Active Test

Tester Display

ABS Solenoid (SRLH)
Chassis > ABS/VSC/TRAC > Active Test

Tester Display

ABS Solenoid (SRRH)
Chassis > ABS/VSC/TRAC > Active Test

Tester Display

ABS Solenoid (SFLH)
Chassis > ABS/VSC/TRAC > Active Test

Tester Display

ABS Solenoid (SFRH)

(b) Operate the SFRH (front right wheel holding solenoid valve), SFLH (front left wheel holding solenoid valve), SRRH (rear right wheel holding solenoid valve) and SRLH (rear left wheel holding solenoid valve) solenoids one by one. While operating each solenoid, depress the brake pedal, open the corresponding bleeder plug and check that brake fluid does not flow from the bleeder plug.

OK:

Brake fluid does not flow from the corresponding bleeder plug when the brake pedal is depressed when operating each solenoid.

(c) While not operating the SFRH (front right wheel holding solenoid valve), SFLH (front left wheel holding solenoid valve), SRRH (rear right wheel holding solenoid valve) and SRLH (rear left wheel holding solenoid valve) solenoids, depress the brake pedal, open each bleeder plug and check that brake fluid flows from each bleeder plug.

OK:

Brake fluid flows from each bleeder plug when not operating each solenoid and the brake pedal is depressed.

OK

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

NG

REPLACE BRAKE ACTUATOR ASSEMBLY

Increasing Pressure Solenoid (FR) (C1352-C1359)

DESCRIPTION

Each solenoid adjusts the pressure which affects each wheel cylinder according to signals from the skid control ECU (brake booster with master cylinder assembly) and controls the vehicle.

DTC No.

Detection Item

INF Code

DTC Detection Condition

Trouble Area

MIL

Note

C1352

Increasing Pressure Solenoid (FR)

11

1100

1101

1102

1103

1170
  • INF Code: 11
    • A malfunction in the solenoid current monitoring circuit is detected for 0.05 seconds or more.
  • INF Code: 1100
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1101
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1102
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1103
    • A solenoid drive circuit malfunction (flyback diode malfunction) is detected for 0.05 seconds or more.
  • INF Code: 1170
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 11: SAE Code C12BC (Case 2)
  • INF Code 1100: SAE Code C12BD
  • INF Code 1101: SAE Code C12BE (Case 1)
  • INF Code 1102: SAE Code C12BE (Case 2)
  • INF Code 1103: SAE Code C12BC (Case 1)
  • INF Code 1170: SAE Code C12BE (Case 3)
  • Electronically controlled brake system DTC

C1353

Increasing Pressure Solenoid (FL)

13

1106

1107

1108

1109

1172
  • INF Code: 13
    • A malfunction in the solenoid current monitoring circuit is detected for 0.05 seconds or more.
  • INF Code: 1106
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1107
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1108
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1109
    • A solenoid drive circuit malfunction (flyback diode malfunction) is detected for 0.05 seconds or more.
  • INF Code: 1172
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 13: SAE Code C12A6 (Case 2)
  • INF Code 1106: SAE Code C12A7
  • INF Code 1107: SAE Code C12A8 (Case 1)
  • INF Code 1108: SAE Code C12A8 (Case 2)
  • INF Code 1109: SAE Code C12A6 (Case 1)
  • INF Code 1172: SAE Code C12A8 (Case 3)
  • Electronically controlled brake system DTC

C1354

Increasing Pressure Solenoid (RR)

15

1112

1113

1114

1115

1174
  • INF Code: 15
    • A malfunction in the solenoid current monitoring circuit is detected for 0.05 seconds or more.
  • INF Code: 1112
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1113
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1114
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1115
    • A solenoid drive circuit malfunction (flyback diode malfunction) is detected for 0.05 seconds or more.
  • INF Code: 1174
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 15: SAE Code C12E8 (Case 2)
  • INF Code 1112: SAE Code C12E9
  • INF Code 1113: SAE Code C12EA (Case 1)
  • INF Code 1114: SAE Code C12EA (Case 2)
  • INF Code 1115: SAE Code C12E8 (Case 1)
  • INF Code 1174: SAE Code C12EA (Case 3)
  • Electronically controlled brake system DTC

C1355

Increasing Pressure Solenoid (RL)

17

1118

1119

1120

1121

1176
  • INF Code: 17
    • A malfunction in the solenoid current monitoring circuit is detected for 0.05 seconds or more.
  • INF Code: 1118
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1119
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1120
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1121
    • A solenoid drive circuit malfunction (flyback diode malfunction) is detected for 0.05 seconds or more.
  • INF Code: 1176
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 17: SAE Code C12D2 (Case 2)
  • INF Code 1118: SAE Code C12D3
  • INF Code 1119: SAE Code C12D4 (Case 1)
  • INF Code 1120: SAE Code C12D4 (Case 2)
  • INF Code 1121: SAE Code C12D2 (Case 1)
  • INF Code 1176: SAE Code C12D4 (Case 3)
  • Electronically controlled brake system DTC

C1356

Decreasing Pressure Solenoid (FR)

12

1104

1105

1171
  • INF Code: 12
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1104
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1105
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1171
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 12: SAE Code C12C8
  • INF Code 1104: SAE Code C12C9 (Case 1)
  • INF Code 1105: SAE Code C12C9 (Case 2)
  • INF Code 1171: SAE Code C12C9 (Case 3)
  • Electronically controlled brake system DTC

C1357

Decreasing Pressure Solenoid (FL)

14

1110

1111

1173
  • INF Code: 14
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1110
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1111
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1173
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 14: SAE Code C12B2
  • INF Code 1110: SAE Code C12B3 (Case 1)
  • INF Code 1111: SAE Code C12B3 (Case 2)
  • INF Code 1173: SAE Code C12B3 (Case 3)
  • Electronically controlled brake system DTC

C1358

Decreasing Pressure Solenoid (RR)

16

1116

1117

1175
  • INF Code: 16
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1116
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1117
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1175
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 16: SAE Code C12F4
  • INF Code 1116: SAE Code C12F5 (Case 1)
  • INF Code 1117: SAE Code C12F5 (Case 2)
  • INF Code 1175: SAE Code C12F5 (Case 3)
  • Electronically controlled brake system DTC

C1359

Decreasing Pressure Solenoid (RL)

18

1122

1123

1177
  • INF Code: 18
    • An open is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1122
    • Overcurrent is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1123
    • Current leakage is detected in the solenoid for 0.05 seconds or more.
  • INF Code: 1177
    • The ECU solenoid output differs from the drain monitoring output (drain monitoring is on when the ECU solenoid is not operating) for 0.05 seconds or more.
  • Wire harness or connector
  • Brake actuator assembly
  • Skid control ECU (brake booster with master cylinder assembly)

Comes on
  • INF Code 18: SAE Code C12DE
  • INF Code 1122: SAE Code C12DF (Case 1)
  • INF Code 1123: SAE Code C12DF (Case 2)
  • INF Code 1177: SAE Code C12DF (Case 3)
  • Electronically controlled brake system DTC

MONITOR DESCRIPTION

The skid control ECU (brake booster with master cylinder assembly) monitors the drive voltage and current of the ABS holding solenoid and ABS reduction solenoid. Based on the monitored information, if any of the following abnormal conditions are detected, the MIL is illuminated and a DTC is stored.

  • A flyback circuit malfunction is detected.
  • A malfunction of the current monitor is detected.
  • An open circuit in the holding valve is detected.
  • When the monitored current value increases to a value that is not possible when normal.
  • A current leakage is detected.
  • Output malfunction is detected when there is a solenoid off command.
  • An open circuit in the decrease pressure valve is detected.

MONITOR STRATEGY

Related DTCs

C12A6 (Case 1): ABS holding solenoid range/performance

C12A6 (Case 2): ABS holding solenoid range/performance

C12A7: ABS holding solenoid circuit low

C12A8 (Case 1): ABS holding solenoid circuit high

C12A8 (Case 2): ABS holding solenoid circuit high

C12A8 (Case 3): ABS holding solenoid circuit high

C12B2: ABS reduction solenoid circuit low

C12B3 (Case 1): ABS reduction solenoid circuit high

C12B3 (Case 2): ABS reduction solenoid circuit high

C12B3 (Case 3): ABS reduction solenoid circuit high

C12BC (Case 1): ABS holding solenoid range/performance

C12BC (Case 2): ABS holding solenoid range/performance

C12BD: ABS holding solenoid circuit low

C12BE (Case 1): ABS holding solenoid circuit high

C12BE (Case 2): ABS holding solenoid circuit high

C12BE (Case 3): ABS holding solenoid circuit high

C12C8: ABS reduction solenoid circuit low

C12C9 (Case 1): ABS reduction solenoid circuit high

C12C9 (Case 2): ABS reduction solenoid circuit high

C12C9 (Case 3): ABS reduction solenoid circuit high

C12D2 (Case 1): ABS holding solenoid range/performance

C12D2 (Case 2): ABS holding solenoid range/performance

C12D3: ABS holding solenoid circuit low

C12D4 (Case 1): ABS holding solenoid circuit high

C12D4 (Case 2): ABS holding solenoid circuit high

C12D4 (Case 3): ABS holding solenoid circuit high

C12DE: ABS reduction solenoid circuit low

C12DF (Case 1): ABS reduction solenoid circuit high

C12DF (Case 2): ABS reduction solenoid circuit high

C12DF (Case 3): ABS reduction solenoid circuit high

C12E8 (Case 1): ABS holding solenoid range/performance

C12E8 (Case 2): ABS holding solenoid range/performance

C12E9: ABS holding solenoid circuit low

C12EA (Case 1): ABS holding solenoid circuit high

C12EA (Case 2): ABS holding solenoid circuit high

C12EA (Case 3): ABS holding solenoid circuit high

C12F4: ABS reduction solenoid circuit low

C12F5 (Case 1): ABS reduction solenoid circuit high

C12F5 (Case 2): ABS reduction solenoid circuit high

C12F5 (Case 3): ABS reduction solenoid circuit high

Required Sensors/Components(Main)

Skid control ECU (brake booster with master cylinder assembly)

Brake actuator assembly

Required Sensors/Components(Related)

Skid control ECU (brake booster with master cylinder assembly)

Brake actuator assembly

Frequency of Operation

Continuous

Duration

54 times: C12B2, C12C8, C12DE and C12F4

0.054 seconds: C12A6 (Case 1 and 2), C12A7, C12A8 (Case 1, 2 and 3), C12B3 (Case 1, 2 and 3), C12BC (Case 1 and 2), C12BD, C12BE (Case 1, 2 and 3), C12C9 (Case 1, 2 and 3), C12D2 (Case 1 and 2), C12D3, C12D4 (Case 1, 2 and 3), C12DF (Case 1, 2 and 3), C12E8 (Case 1 and 2), C12E9, C12EA (Case 1, 2 and 3) and C12F5 (Case 1, 2 and 3)

MIL Operation

Immediately

Sequence of Operation

None

TYPICAL ENABLING CONDITIONS

All

Monitor runs whenever the following DTCs are not stored

None
C12A6, C12BC, C12D2 and C12E8 (Case 1 and 2)

Serial communication with low side IC

Valid
C12A7, C12BD, C12D3 and C12E9

All of the following conditions are met

-

Power supply for ABS solenoid

Higher than 9.13 V

Serial communication with low side IC

Valid

Output duty cycle

Higher than 40%

ABS holding solenoid current monitor

Normal

ABS solenoid power supply relay

On
C12A8, C12B3, C12BE, C12C9, C12D4, C12DF, C12EA and C12F5 (Case 1)

Both of the following conditions are met

-

Serial communication with low side IC

Valid

Current monitor power supply

Higher than 1.2 V, and less than 1.38 V
C12A8, C12BE, C12D4 and C12EA (Case 2)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Output duty cycle

0%
C12A8, C12BE, C12D4 and C12EA (Case 3)

All of the following conditions are met

-

Serial communication with low side IC

Valid

Power supply for ABS solenoid

Higher than 9.13 V

Output duty cycle

0%

ABS solenoid power supply relay

On
C12B2, C12C8, C12DE and C12F4

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Command to reduction solenoid on/off

On

ABS reduction solenoid current

Less than 4.4 A
C12B3, C12C9, C12DF and C12F5 (Case 2)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Command to reduction solenoid on/off

Off
C12B3, C12C9, C12DF and C12F5 (Case 3)

All of the following conditions are met

-

Serial communication with low side IC

Valid

Power supply for ABS solenoid

Higher than 9.13 V

Command to reduction solenoid on/off

Off

ABS solenoid power supply relay

On

TYPICAL MALFUNCTION THRESHOLDS

C12A6, C12BC, C12D2 and C12E8 (Case 1)

ABS holding solenoid voltage

Higher than 35 V
C12A6, C12BC, C12D2 and C12E8 (Case 2)

One of the following conditions is met

A, B or C

A. Both of the following conditions are met

-

ABS holding solenoid current monitor value

Less than 46

ABS holding solenoid current

Less than 3.5 A

B. Current monitor power supply

Higher than 1.38 V, or less than 1.2 V

C. AC/DC converter built into CPU standard voltage

Less than 4.4 V
C12A7, C12BD, C12D3 and C12E9

ABS holding solenoid current

Less than 0.2 A
C12A8, C12BE, C12D4 and C12EA (Case 1)

ABS holding solenoid current

Higher than 3.5 A
C12A8, C12BE, C12D4 and C12EA (Case 2)

ABS holding solenoid voltage

Less than 11.25 V
C12A8, C12BE, C12D4 and C12EA (Case 3)

ABS holding solenoid voltage

Less than 4.128 V
C12B2, C12C8, C12DE and C12F4

Either of the following conditions is met

-

ABS reduction solenoid voltage

Higher than 4.2 V

ABS reduction solenoid current

Less than 0.02 A
C12B3, C12C9, C12DF and C12F5 (Case 1)

ABS reduction solenoid current

Higher than 4.4 A
C12B3, C12C9, C12DF and C12F5 (Case 2)

ABS reduction solenoid voltage

Less than 11.25 V
C12B3, C12C9, C12DF and C12F5 (Case 3)

ABS reduction solenoid voltage

Less than 4.128 V

COMPONENT OPERATING RANGE

C12A6, C12BC, C12D2 and C12E8 (Case 1)

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Output duty cycle

Higher than 0%

Low side IC malfunction

Not detected

ABS holding solenoid voltage

Less than 35 V
C12A6, C12BC, C12D2 and C12E8 (Case 2)

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

ABS holding solenoid current monitor value

46 or more

Current monitor power supply

1.38 V or less, and 1.2 V or more

AC/DC converter built into CPU standard voltage

Higher than 4.4 V
C12A7, C12BD, C12D3 and C12E9

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Output duty cycle

Higher than 40%

ABS holding solenoid current monitor

Normal

ABS holding solenoid current

0.2 A or more
C12A8, C12BE, C12D4 and C12EA (Case 1)

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Output duty cycle

Higher than 0%

Low side IC malfunction

Not detected

ABS holding solenoid current

Less than 3.5 A
C12A8, C12BE, C12D4 and C12EA (Case 2)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Output duty cycle

0%

ABS holding solenoid voltage

Higher than 11.29 V
C12A8, C12BE, C12D4 and C12EA (Case 3)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Output duty cycle

0%

ABS holding solenoid voltage

Higher than 4.2 V
C12B2, C12C8, C12DE and C12F4

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Command to reduction solenoid on/off

On

Low side IC malfunction

Not detected

ABS reduction solenoid voltage

Less than 4.128 V

ABS reduction solenoid current

Higher than 0.02 A
C12B3, C12C9, C12DF and C12F5 (Case 1)

All of the following conditions are met

-

ABS solenoid power supply relay

On

Serial communication with low side IC

Valid

Command to reduction solenoid on/off

On

Low side IC malfunction

Not detected

ABS reduction solenoid current

Less than 4.4 A
C12B3, C12C9, C12DF and C12F5 (Case 2)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Command to reduction solenoid on/off

Off

ABS reduction solenoid voltage

Higher than 11.29 V
C12B3, C12C9, C12DF and C12F5 (Case 3)

All of the following conditions are met

-

Serial communication with low side IC

Valid

ABS solenoid power supply relay

On

Command to reduction solenoid on/off

Off

ABS reduction solenoid voltage

Higher than 4.2 V

CONFIRMATION DRIVING PATTERN

  1. Connect the Techstream to the DLC3.
  2. Turn the power switch on (IG).
  3. Turn the Techstream on.
  4. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  5. Turn the power switch off.
  6. Turn the power switch on (IG).
  7. Turn the Techstream on.
  8. Drive the vehicle at a speed of 20 km/h (12 mph) for 1 minute.
  9. Operate the ABS using a drum tester or equivalent.
  10. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
  11. Read the DTCs.

    HINT:

    • If a DTC is output, the system is malfunctioning.
    • If a DTC is not output, perform the following procedure.
  12. If the DTCs are not output, perform a universal trip and check for permanent DTCs.

    Click here

    HINT:

    • If a permanent DTC is output, the system is malfunctioning.
    • If no permanent DTCs are output, the system is normal.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

After replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".

Click here

PROCEDURE

1.

INSPECT BRAKE ACTUATOR ASSEMBLY

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

*a

Component without harness connected

(Brake Actuator Assembly)

-

-

(b) Disconnect the A39 brake actuator assembly connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

HINT:

Check the brake actuator assembly when it is cooled down.

Standard Resistance:

Tester Connection

Condition

Specified Condition

5 (+BS) - 28 (SFRH)

Always

6.4 to 7.0 Ω

5 (+BS) - 31 (SFLH)

Always

6.4 to 7.0 Ω

5 (+BS) - 30 (SRRH)

Always

6.4 to 7.0 Ω

5 (+BS) - 29 (SRLH)

Always

6.4 to 7.0 Ω

5 (+BS) - 18 (SFRR)

Always

5.1 to 5.7 Ω

5 (+BS) - 15 (SFLR)

Always

5.1 to 5.7 Ω

5 (+BS) - 16 (SRRR)

Always

5.1 to 5.7 Ω

5 (+BS) - 17 (SRLR)

Always

5.1 to 5.7 Ω
NG

REPLACE BRAKE ACTUATOR ASSEMBLY

OK

2.

CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(b) Disconnect the A35 skid control ECU (brake booster with master cylinder assembly) connector.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A35-14 (+BS) - A39-5 (+BS)

Always

Below 1 Ω

A35-14 (+BS) or A39-5 (+BS) - Body ground

Always

10 kΩ or higher

A35-48 (SFRH) - A39-28 (SFRH)

Always

Below 1 Ω

A35-48 (SFRH) or A39-28 (SFRH) - Body ground

Always

10 kΩ or higher

A35-49 (SFLH) - A39-31 (SFLH)

Always

Below 1 Ω

A35-49 (SFLH) or A39-31 (SFLH) - Body ground

Always

10 kΩ or higher

A35-50 (SRRH) - A39-30 (SRRH)

Always

Below 1 Ω

A35-50 (SRRH) or A39-30 (SRRH) - Body ground

Always

10 kΩ or higher

A35-51 (SRLH) - A39-29 (SRLH)

Always

Below 1 Ω

A35-51 (SRLH) or A39-29 (SRLH) - Body ground

Always

10 kΩ or higher

A35-44 (SFRR) - A39-18 (SFRR)

Always

Below 1 Ω

A35-44 (SFRR) or A39-18 (SFRR) - Body ground

Always

10 kΩ or higher

A35-45 (SFLR) - A39-15 (SFLR)

Always

Below 1 Ω

A35-45 (SFLR) or A39-15 (SFLR) - Body ground

Always

10 kΩ or higher

A35-46 (SRRR) - A39-16 (SRRR)

Always

Below 1 Ω

A35-46 (SRRR) or A39-16 (SRRR) - Body ground

Always

10 kΩ or higher

A35-47 (SRLR) - A39-17 (SRLR)

Always

Below 1 Ω

A35-47 (SRLR) or A39-17 (SRLR) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

RECONFIRM DTC

(a) Reconnect the A35 skid control ECU (brake booster with master cylinder assembly) connector.

(b) Reconnect the A39 brake actuator assembly connector.

(c) Clear the DTCs.

Click here

Chassis > ABS/VSC/TRAC > Clear DTCs

(d) Turn the power switch off.

(e) Turn the power switch on (IG).

(f) Check if the same DTC is output.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs C1352, C1353, C1354, C1355, C1356, C1357, C1358 and C1359 are not output.

A

DTCs C1352, C1353, C1354, C1355, C1356, C1357, C1358 and/or C1359 are output.

B
A

USE SIMULATION METHOD TO CHECK

B

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY

Open Circuit in Main Relay 1 (C1311,C1312)

Stop Light Control Relay Malfunction (C1380)

See More:

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual

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