Toyota Avalon (XX50): Problem Symptoms Table. Slip Indicator Light does not Come ON. Slip Indicator Light Remains ON

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Brake / Brake Control / Dynamic Control Systems / Electronically Controlled Brake System(for Gasoline Model) / Problem Symptoms Table. Slip Indicator Light does not Come ON. Slip Indicator Light Remains ON

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

If there are no DTCs output and the problem still occurs, check the suspected areas for each problem symptom in the order given in the following table and proceed to the relevant troubleshooting page.

NOTICE:

When replacing the skid control ECU (brake actuator assembly), sensors, etc., turn the engine switch off.

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Vehicle Stability Control System

Symptom	Suspected Area	Link
ABS warning light abnormal (Remains on)	Refer to the procedure for "ABS Warning Light Remains ON"
ABS warning light abnormal (Does not come on)	Refer to the procedure for "ABS Warning Light does not Come ON"
Brake system warning light (red indicator) abnormal (Remains on)	Refer to the procedure for "Brake Warning Light Remains ON"
Brake system warning light (red indicator) abnormal (Does not come on)	Refer to the procedure for "Brake Warning Light does not Come ON"
Brake hold standby indicator light abnormal	Refer to the procedure for "Brake Hold Standby Indicator Light Circuit"
Brake hold operated indicator light abnormal	Refer to the procedure for "Brake Hold Operated Indicator Light Circuit"
Slip indicator light abnormal (Remains on)	Refer to the procedure for "Slip Indicator Light Remains ON"
Slip indicator light abnormal (Does not come on)	Refer to the procedure for "Slip Indicator Light does not Come ON"
TRAC does not operate	Refer to the procedure for "TRAC does not Operate"
Excessive brake pedal travel (No fluid leaks and no air in system)	Refer to the procedure for "Excessive Brake Pedal Travel (No Fluid Leaks and No Air in System)"
ABS operates before necessary when braking	Refer to the procedure for "ABS Operates Before Necessary When Braking"
VSC does not operate or VSC does not operate correctly	Refer to the procedure for "VSC does not Operate or VSC does not Operate Correctly"
Brake actuator operation sound is loud during initial check	Refer to the procedure for "Brake Actuator Operation Sound is Loud during Initial Check"
VSC OFF switch abnormal	Refer to the procedure for "VSC OFF Switch Circuit"

Slip Indicator Light does not Come ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

Click here

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here

Result	Proceed to
DTCs are not output	A
DTCs are output	B

INSPECT CAN COMMUNICATION SYSTEM

2.	PERFORM ACTIVE TEST USING TECHSTREAM (SLIP INDICATOR LIGHT)

(a) Enter the following menus: Chassis / ABS/VSC/TRAC/EPB / Active Test.

Chassis > ABS/VSC/TRAC/EPB > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
Slip Indicator Light	Slip Indicator light	Indicator light OFF/ON	Observe combination meter assembly

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Slip Indicator Light	Slip indicator light	ON or OFF	ON: Indicator light on OFF: Indicator light off	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Slip Indicator Light

Slip indicator light

ON or OFF

ON: Indicator light on

OFF: Indicator light off

Chassis > ABS/VSC/TRAC/EPB > Active Test

Active Test Display
Slip Indicator Light

Data List Display
Slip Indicator Light

(b) Check the operating condition of the slip indicator light when operating it using the Techstream.

Result	Proceed to
Slip Indicator Light in the Data List does not change using the Active Test	A
Slip Indicator Light in the Data List turns ON/OFF using the Active Test	B

REPLACE BRAKE ACTUATOR ASSEMBLY

3.	INSPECT COMBINATION METER ASSEMBLY

(a) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(b) Perform an Active Test of the combination meter assembly using the Techstream.

Body Electrical > Combination Meter > Active Test

Tester Display
Slip Warning

OK:

The slip indicator light turns on or off in accordance with Techstream operation.

REPLACE BRAKE ACTUATOR ASSEMBLY

INSPECT METER / GAUGE SYSTEM

Slip Indicator Light Remains ON

DESCRIPTION

The skid control ECU (brake actuator assembly) is connected to the combination meter assembly via CAN communication.

The slip indicator light blinks during VSC and/or TRAC operation.

If a malfunction is detected, the slip indicator light comes on to warn the driver.

Click here

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When replacing the skid control ECU (brake actuator assembly), perform system variant learning and acceleration sensor zero point calibration.

Click here

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here

Result	Proceed to
DTCs are not output	A
DTCs are output	B

INSPECT CAN COMMUNICATION SYSTEM

2.	CHECK IF BRAKE ACTUATOR ASSEMBLY CONNECTOR IS SECURELY CONNECTED

(a) Check if the skid control ECU (brake actuator assembly) connector is securely connected.

OK:

The connector is securely connected.

CONNECT CONNECTOR TO BRAKE ACTUATOR ASSEMBLY CORRECTLY

3.	CHECK BATTERY

(a) Check the battery voltage.

Standard Voltage:

Tester Connection	Condition	Specified Condition
Positive (+) terminal - Negative (-) terminal	Engine switch off	11 to 14 V

CHECK OR REPLACE CHARGING SYSTEM COMPONENT OR BATTERY

4.	READ VALUE USING TECHSTREAM (SLIP INDICATOR LIGHT)

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Slip Indicator Light	Slip indicator light	ON or OFF	ON: Indicator light on OFF: Indicator light off	-

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Slip Indicator Light

Slip indicator light

ON or OFF

ON: Indicator light on

OFF: Indicator light off

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display
Slip Indicator Light

(d) Check the Techstream display condition of the slip indicator light.

Result	Proceed to
The value of Slip Indicator Light is ON	A
The value of Slip Indicator Light is OFF	B

REPLACE BRAKE ACTUATOR ASSEMBLY

INSPECT METER / GAUGE SYSTEM

How To Proceed With Troubleshooting. Parts Location. Precaution

System Diagram. Terminals Of Ecu. Test Mode Procedure

See More:

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