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-III
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-III
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-III
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.

5.CHECK COMBINATION METER

With CONSULT-III
Perform the trouble diagnosis of the combination meter. Refer to MWI-50, "COMBINATION METER: Diagnosis Procedure". Combination Meter
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace the combination meter.

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".