Anti-Lock Brake System Abs Warning Light Remains On

Brake. Camry. Acv40 Gsv40
Brake Control. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT CAN COMMUNICATION SYSTEM

CHECK SKID CONTROL ECU CONNECTOR SECURELY CONNECTED

CHECK BATTERY

INSPECT SKID CONTROL ECU CONNECTOR (IG1 TERMINAL VOLTAGE)

INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY)

INSPECT COMBINATION METER ASSEMBLY

ANTI-LOCK BRAKE SYSTEM - ABS Warning Light Remains ON


DESCRIPTION

The skid control ECU sends the indicator signals to the combination meter assembly via the CAN communication system.
If any of the following is detected, the ABS warning light remains on.
  1. The skid control ECU connectors are disconnected from the skid control ECU.
  2. There is a malfunction in the skid control ECU internal circuit.
  3. There is an open in the wire harness between the combination meter and the skid control ECU.
  4. The ABS and/or EBD is defective.
HINT:
The intelligent tester may not be used when the skid control ECU is abnormal.

WIRING DIAGRAM


Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Remains On


INSPECTION PROCEDURE

HINT:
Check the condition of each related circuit before troubleshooting (CAMRY_ACV40 RM000000UZ301ZX.html).
1.INSPECT CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication system DTC is output (CAMRY_ACV40 RM000001JB800LX.html).

    Result:

    Condition
    		Proceed to
    CAN communication system DTC is not output
    		A
    CAN communication system DTC is output
    		B


B
INSPECT CAN COMMUNICATION SYSTEM (CAMRY_ACV40 RM000000WI605LX.html)
A


2.CHECK SKID CONTROL ECU CONNECTOR SECURELY CONNECTED

  1. Check if the skid control ECU connector is connected.

    OK:
    The connector is securely connected.


NG
CONNECT CONNECTOR TO ECU CORRECTLY
OK


3.CHECK BATTERY

  1. Check the battery voltage.

    Standard voltage:
    11 to 14 V


NG
INSPECT CHARGING SYSTEM
OK


4.INSPECT SKID CONTROL ECU CONNECTOR (IG1 TERMINAL VOLTAGE)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Remains On

  1. Disconnect the skid control ECU connector.

  1. Turn the ignition switch to the ON position.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    A25-18 (IG1) - Body ground
    		Ignition switch on
    		10 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT)
OK


5.INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY)


    Camry. Acv40 Gsv40.Brake Control.Anti-Lock Brake System.Anti-Lock Brake System Abs Warning Light Remains On

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

    Standard resistance:
    Tester Connection
    		Specified Condition
    A25-4 (GND1) - Body ground
    		Below 1 Ω
    A25-1 (GND2) - Body ground
    		Below 1 Ω

  1. Connect the connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT)
OK


6.INSPECT COMBINATION METER ASSEMBLY

  1. Connect the intelligent tester to the DLC3.

  1. Select the "Active Test" on the tester (CAMRY_ACV40 RM000001JBA003X.html).

    Active Test: ABS
    Tester Display
    		Test Part/Control Range
    		Diagnostic Note
    ABS Warning Lamp
    		Turn ABS warning light ON / OFF
    		Observe combination meter

  1. Check the ABS warning light operation.

    OK:
    The ABS warning light turns on or off in accordance with the intelligent tester.

    Result:

    Condition
    		Proceed to
    OK
    		A
    OK (When troubleshooting in accordance with the PROBLEM SYMPTOMS TABLE)
    		B
    NG
    		C


B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (CAMRY_ACV40 RM000001JB500KX.html)

C
REPLACE COMBINATION METER ASSEMBLY (CAMRY_ACV40 RM0000024D701JX.html)
A

REPLACE BRAKE ACTUATOR ASSEMBLY (CAMRY_ACV40 RM0000013P6007X.html)