VEHICLE STABILITY CONTROL SYSTEM ABS Warning Light Remains ON

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DESCRIPTION

The skid control ECU is connected to the combination meter via CAN communication.

If any of the following is detected, the ABS warning light remains on:

• The skid control ECU connector is disconnected from the skid control ECU.

• There is a malfunction in the skid control ECU internal circuit.

• There is an open in the harness between the combination meter and skid control ECU.

• The ABS and/or BA is defective.

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INSPECTION PROCEDURE

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PROCEDURE

1. Click here

   CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Check if a CAN communication system DTC is output (Click here).

      Table 1. Result

      Result	Proceed to
      CAN communication system DTC is not output.	A
      CAN communication system DTC is output.	B

   
   
   • AClick here
   • BClick here
2. Click here

   CHECK IF SKID CONTROL ECU CONNECTOR IS SECURELY CONNECTED

   
   

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

      OK
      The connector is securely connected.

   
   
   • OKClick here
   • NGClick here
3. Click here

   CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)

   
   

   1. Turn the ignition switch off.

   2. Disconnect the skid control ECU connector.

   3. 

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition A52 or A54-28 (IG1) - Body ground Ignition switch ON 11 to 14 V

      Table 2. Text in Illustration

      *1	Front view of wire harness connector (to Skid Control ECU)
      *2	for AD Series Engine, 1WW
      *3	for ZR Series Engine

      Table 3. Result

      Result	Proceed to
      OK	A
      NG (w/o Stop and Start System)	B
      NG (w/ Stop and Start System)	C

   
   
   • AClick here
   • BClick here
   • CClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (GND1, GND2 TERMINAL)

   
   

   1. Turn the ignition switch off.

   2. Disconnect the skid control ECU connector.

   3. 

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

      Standard Resistance
      Tester Connection Condition Specified Condition A52 or A54-4 (GND1) - Body ground Always Below 1 Ω A52 or A54-1 (GND2) - Body ground Always Below 1 Ω

      Table 4. Text in Illustration

      *1	Front view of wire harness connector (to Skid Control ECU)
      *2	for AD Series Engine, 1WW
      *3	for ZR Series Engine

   
   
   • OKClick here
   • NGClick here
5. Click here

   INSPECT COMBINATION METER ASSEMBLY

   
   

   1. Perform the Active Test of the combination meter to check the ABS warning light using the intelligent tester (Click here).

      OK
      The ABS warning light blinks or turns off in accordance with the intelligent tester operation.

      Tip:

      If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (Click here).

   
   
   • OKClick here
   • NGClick here
6. Click here

   REPLACE BRAKE ACTUATOR ASSEMBLYClick here

7. Click here

   GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)Click here

8. Click here

   CONNECT CONNECTOR TO ECU CORRECTLY

9. Click here

   REPAIR OR REPLACE HARNESS OR CONNECTOR

10. Click here

    REPLACE COMBINATION METER ASSEMBLYClick here

11. Click here

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT)Click here