ANTI-LOCK BRAKE SYSTEM > ABS Warning Light Remains ON

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DESCRIPTION

When checking for a 2 digit DTC, the ABS warning light may remain on.

WIRING DIAGRAM


C108876E01


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Turn the ignition switch ON.

  1. Check that the ABS warning light illuminates.

  1. Check if the same DTCs are recorded.

    Result 
    Result
    		Proceed to
    DTC is not output (when using intelligent tester)
    		A
    DTC is not output (when not using intelligent tester)
    		B
    DTC is output
    		C



B
Go to step 7

C
REPAIR CIRCUIT INDICATED BY OUTPUT DTC
A


2.INSPECT SKID CONTROL ECU CONNECTOR

  1. Check that each ECU connector is properly installed.

    OK:
    Each ECU connector is properly installed.



NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


3.READ VALUE OF INTELLIGENT TESTER (ECU IG POWER VOLTAGE)

  1. Using the Data List, check for proper functioning of the ECU IG power voltage.

    Skid control ECU 
    Item
    		Measurement Item / Range (Display)
    		Normal Condition
    		Diagnostic Note
    ECU IG Power Voltage
    		ECU power supply voltage / TOO LOW / NORMAL / TOO HIGH
    		TOO HIGH: more than 14.0 V
    NORMAL: 10 to 14 V
    TOO LOW: Below 10 V
    		-
    Result 
    Result
    		Proceed to
    Display is NORMAL
    		A
    Display is not NORMAL
    		B



B
Go to step 11
A


4.CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)
C108884E07

  1. Disconnect the S2 ECU connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    S2-22 (EXI2) - Body ground
    		Ignition switch ON
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


5.CHECK ABS WARNING LIGHT
C108884E08

  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.



NG
REPLACE BRAKE ACTUATOR ASSEMBLY
OK


6.CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER ASSEMBLY AND BODY GROUND)
C108898E05

  1. Disconnect the S2 ECU

  1. Disconnect the C8 meter connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    S2-13 (WA) - C8-38
    		Below 1 Ω
    S2-13 (WA) - Body ground
    		10 kΩ or higher
    S2-2 (GND1) - Body ground
    		Below 1 Ω
    S2-24 (GND2) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY 

7.INSPECT SKID CONTROL ECU CONNECTOR

  1. Check that each ECU connector is properly installed.

    OK:
    Each ECU connector is properly installed.



NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


8.CHECK WIRE HARNESS (SKID CONTROL ECU - BATTERY)
C108884E09

  1. Disconnect the S2 ECU connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    S2-25 (IG1) - Body ground
    		Ignition switch ON
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK


9.CHECK ABS WARNING LIGHT
C108884E10

  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.



NG
REPLACE BRAKE ACTUATOR ASSEMBLY
OK


10.CHECK WIRE HARNESS (SKID CONTROL ECU - COMBINATION METER ASSEMBLY AND BODY GROUND)
C108898E06

  1. Disconnect the S2 ECU connector.

  1. Disconnect the C8 meter connector.

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    S2-13 (WA) - C8-38
    		Below 1 Ω
    S2-13 (WA) - Body ground
    		10 kΩ or higher
    S2-2 (GND1) - Body ground
    		Below 1 Ω
    S2-24 (GND2) - Body ground
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE COMBINATION METER ASSEMBLY 

11.CHECK WIRE HARNESS
C108884E09

  1. Disconnect the S2 ECU connector.

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    S2-25 (IG1) - Body ground
    		Ignition switch ON
    		10 to 14 V



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE BRAKE ACTUATOR ASSEMBLY