4WAS Warning Lamp

4WAS WARNING LAMP

Description

- Turn 4WAS warning lamp ON when ignition switch turns ON from OFF. Then, turn 4WAS warning lamp OFF
after the engine is started.
- The check of 4WAS system is performed.
- 4WAS system stops (error) when turning 4WAS warning lamp ON.


Diagnosis Procedure


1. PERFORM UNIFIED METER AND A/C AMP. SELF-DIAGNOSIS

With CONSULT
Perform the self-diagnosis of the unified meter and A/C amp.
Is any error system detected?
YES- Check the error system.
NO- GO TO 2.

2. PERFORM SELF-DIAGNOSIS (4WAS MAIN CONTROL UNIT)

With CONSULT
Perform 4WAS main control unit self-diagnosis.
Is DTC "U1000" or "U1010" detected?
YES- Check the error system.
NO- GO TO 3.

3. PERFORM COMBINATION METER CIRCUIT

1.Turn the ignition switch OFF.
2.Disconnect the unified meter and A/C amp. harness connector.
3.Disconnect the combination meter harness connector.
4.Check the continuity between the unified meter and A/C amp. harness connector and the combination meter harness connector terminal.





Is the inspection result normal?
YES- GO TO 4.
NO- Repair or replace the harnesses and connectors.

4. CHECK 4WAS WARNING LAMP SIGNAL

With CONSULT
1.Connect the unified meter and A/C amp. harness connector.
2.Connect the combination meter harness connector.
3.Disconnect 4WAS front control unit harness connector.
4.Turn the ignition switch ON.

CAUTION:
Never start the engine.
5.Check "WARNING LAMP" item on DATA MONITOR of 4WAS main control unit.
Does the item on "DATA MONITOR" indicate "On"?
YES- GO TO 5.
NO- Replace 4WAS main control unit. Exploded View.

5. CHECK COMBINATION METER

With CONSULT
Perform the trouble diagnosis of the combination meter. Combination Meter.
Is the inspection result normal?
YES- INSPECTION END
NO- Replace the combination meter. Exploded View.


Special Repair Requirement


BEFORE REPLACING 4WAS MAIN CONTROL UNIT

- Record the self-diagnosis results (history).

CAUTION:
- Never erase the memory (history) of self-diagnosis results when replacing 4WAS main control unit after diagnosis.
- Erase the memory of the self-diagnosis results (record) after printing out or recording all the values of "DATA MONITOR".