GSIC - Global Service Information Center

### 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

## 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)

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

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)

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)

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

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)

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

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