DESCRIPTION
This DTC is stored when the skid control ECU (brake actuator assembly) judges that an abnormality occurred in the circuit used to operate the pump motor.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|---|---|---|---|
|
C1428 | Motor Circuit |
A malfunction occurs in the pump motor circuit. |
Pump motor circuit |
WIRING DIAGRAM
Refer to DTC C146C.
Click here 
CAUTION / NOTICE / HINT
NOTICE:
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PROCEDURE
|
1. | CHECK HARNESS AND CONNECTOR (+BM TERMINAL) |
| (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 A28 skid control ECU (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 voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
A28-1 (+BM) - Body ground |
Always | 11 to 14 V |
| NG |  | REPAIR OR REPLACE HARNESS OR CONNECTOR (+BM CIRCUIT) |
|
| 2. |
CHECK HARNESS AND CONNECTOR (GND2 TERMINAL) |
| (a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (GND2 CIRCUIT) |
|
| 3. |
RECONFIRM DTC |
(a) Reconnect the A28 skid control ECU (brake actuator assembly) connector.
(b) Clear the DTCs.
Chassis > ABS/VSC/TRAC/EPB > Clear DTCs(c) Turn the engine switch off.
(d) Start the engine.
(e) Perform a road test.
(f) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC/EPB > Trouble Codes|
Result | Proceed to |
|---|---|
|
C1428 is not output | A |
|
C1428 is output | B |
| A |
| USE SIMULATION METHOD TO CHECK |
| B |
| REPLACE BRAKE ACTUATOR ASSEMBLY |
DESCRIPTION
This DTC is stored when the skid control ECU (brake actuator assembly) receives a +B line open signal from the steering angle sensor.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|---|---|---|---|
|
C1432 | Steering Angle Sensor Power Source Voltage |
With the +BS terminal voltage between 9.6 and 16.5 V, a steering angle sensor power supply circuit malfunction signal is received from the steering angle sensor. |
|
WIRING DIAGRAM
Refer to DTC C1231.
Click here 
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
| 1. |
CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL) |
| (a) Remove the steering wheel and column cover. |
|
(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.
OK:
The connector is securely connected.
(c) Disconnect the G48 steering angle sensor connector.
(d) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(e) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
G48-4 (BAT) - Body ground |
Always | 11 to 14 V |
|
G48-9 (IG1) - Body ground |
Engine switch on (IG) |
11 to 14 V |
| NG |  | REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) |
|
| 2. |
CHECK HARNESS AND CONNECTOR (GROUND TERMINAL) |
| (a) Turn the engine switch off. |
|
(b) Measure the resistance according to the value(s) in the table below.
NOTICE:
Before measuring the resistance of the steering angle sensor, turn the engine switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors.
Standard Resistance:
|
Tester Connection | Condition |
Specified Condition |
|---|---|---|
|
G48-6 (ESS) - Body ground |
1 minute after engine switch off |
Below 1 Ω |
| OK | | REPLACE STEERING ANGLE SENSOR |
| NG | | REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT) |
DESCRIPTION
This DTC is stored when the skid control ECU (brake actuator assembly) receives an internal malfunction signal from the steering angle sensor.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
|---|---|---|---|
|
C1433 | Steering Angle Sensor Internal Circuit |
With the +BS terminal voltage between 9.6 and 16.5 V, a steering angle sensor malfunction signal is received from the steering angle sensor. |
Steering angle sensor |
PROCEDURE
| 1. |
REPLACE STEERING ANGLE SENSOR |
(a) Replace the steering angle sensor.
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| NEXT |  | END |
Toyota Avalon (XX50) 2019-2022 Service & Repair Manual > Airbag System(for Gasoline Model): Parts Location. Precaution. Problem Symptoms Table
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