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The ABS warning lamp illuminates or goes out by the transistor control inside the ASTC-ECU.
In this circuit, when the transistor is ON, the ABS warning lamp illuminates.
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The most likely causes for this case are:
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- Damaged wiring harness or connector
- Combination meter defect
- Malfunction of the ASTC-ECU
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(1)Do not disconnect D-02 combination meter connector, and check at the harness side.
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(2)Disconnect D-232 ASTC-ECU connector.
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(3)Turn the ignition switch to the "ON" position.
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(4)Measure the voltage between terminal 50 and earth.
OK: Approximately system voltage
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Q.
Is the check result normal?
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Q.
Is the check result normal?
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 Repair the defective connector. Then go to Step 5.
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Check for short to earth in the wiring harness.
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Q.
Is the check result normal?
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 Replace the combination meter. Then go to Step 4.
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Repair the harness wire. Then go to Step 5.
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Q.
After the ignition switch is turned to the "ON" position and the ABS warning lamp
has illuminated for 3 seconds, does the lamp go out?
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It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent
Malfunction  .
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Repair the ASTC-ECU. Then go to Step 5.
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Q.
After the ignition switch is turned to the "ON" position and the ABS warning lamp
has illuminated for 3 seconds, does the lamp go out?
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The procedure is complete.
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