Vehicle Speed Signal Circuit

VEHICLE SPEED SIGNAL CIRCUIT

Diagnosis Procedure


1. PERFORM COMBINATION METER SELF-DIAGNOSIS

With CONSULT
Perform self-diagnosis for "METER/M&A".
Is any error system detected?
YES- Check the DTC. Testing and Inspection.
NO- GO TO 2.

2. CHECK VEHICLE SPEED SIGNAL CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect power steering control unit harness connector.
3.Disconnect combination meter harness connector.
4.Check the continuity between combination meter harness connector and power steering control unit harness connector.





Is the inspection result normal?
YES- GO TO 3.
NO- Repair or replace damaged parts.

3. CHECK VEHICLE SPEED SIGNAL (COMBINATION METER)

1.Connect combination meter harness connector.
2.Check the combination meter input/output standard values. Reference Value.
Is the inspection result normal?
YES- GO TO 4.
NO- Replace combination meter. Removal And Installation.

4. CHECK VEHICLE SPEED SIGNAL (POWER STEERING CONTROL UNIT)

1.Connect power steering control unit harness connector.
2.Check the signal between power steering control unit harness connector and ground with oscilloscope.





Is the inspection result normal?
YES- GO TO 5.
NO- Replace power steering control unit. Removal And Installation Without 4WAS.

5. CHECK TERMINALS AND HARNESS CONNECTORS

- Check the power steering control unit pin terminals for damage or loose connection with harness connector.
- Check the combination meter pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?
YES- INSPECTION END
NO- Repair or replace damaged parts.