GSIC - Global Service Information Center

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

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## 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

## 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

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 ASSEMBLY)

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

| 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
Indicator and warning lights operate normally | A
Indicator and warning lights do not operate normally | B

| B |

CHECK COMBINATION METER ASSEMBLY (COMBINATION METER CIRCUIT)

A |

REPLACE COMBINATION METER ASSEMBLY