Anti-Lock Brake System Abs Warning Light Does Not Come On


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHOOSE DIAGNOSIS METHOD

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS WARNING LIGHT)

CHECK ABS WARNING LIGHT

CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER)

CHECK INDICATOR AND WARNING LIGHT

ANTI-LOCK BRAKE SYSTEM - ABS Warning Light does not Come ON


DESCRIPTION

If the skid control ECU detects a malfunction, it will prohibit ABS control, illuminate the ABS warning light and store a DTC. Connecting terminals TC and CG of the DLC3 causes the ECU to display DTCs through ABS warning light blinking patterns.

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Does Not Come On


INSPECTION PROCEDURE

1.CHOOSE DIAGNOSIS METHOD

  1. Choose the diagnosis method.

    Method
    Method
    		Proceed to
    Using intelligent tester
    		A
    Not using intelligent tester
    		B


B
Go to step 3
A


2.PERFORM ACTIVE TEST BY INTELLIGENT TESTER (ABS WARNING LIGHT)

  1. Select the Active Test, generate a control command, and then check that the ABS warning light operates.


Skid control ECU
Item
Vehicle Condition / Test Details
Diagnostic Note
ABS Warning Light
Turn ABS warning light ON / OFF
Observe combination meter
OK:
ABS warning light turns on or off.


OK
REPLACE BRAKE ACTUATOR ASSEMBLY
NG


3.CHECK ABS WARNING LIGHT
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Does Not Come On

  1. Disconnect the S2 ECU connector.

  1. Turn the ignition switch ON.

  1. Using a service wire, connect terminal WA to GND1 or GND2 of the S2 ECU connector. Check the ABS warning light.

    OK:
    ABS warning light turns off.

  1. Turn the ignition switch OFF.

  1. Remove the service wire.

  1. Turn the ignition switch ON. Check the ABS warning light.

    OK:
    ABS warning light illuminates.


OK
REPLACE BRAKE ACTUATOR ASSEMBLY
NG


4.CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER)
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Does Not Come On

  1. Disconnect the S2 ECU connector.

  1. Disconnect the C10 meter connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    S2-13 (WA) - C10-38
    		Below 1 Ω
    S2-13 (WA) - Body ground
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK INDICATOR AND WARNING LIGHT

  1. Check if the indicators and warning lights (SRS, etc.) other than the ABS warning light operate normally.


Result
Result
Proceed to
Indicators and warning lights operate normally
A
Indicators and warning lights do not operate normally
B


B
CHECK COMBINATION METER ASSEMBLY (COMBINATION METER CIRCUIT)
A

REPLACE COMBINATION METER ASSEMBLY