RAS Warning Lamp

RAS WARNING LAMP





Description
- RAS warning lamp turns ON when ignition switch turns ON from OFF. Then, RAS warning lamp turns OFF after the engine is started.
- The check of RAS system is performed.
- RAS system stops (error) when RAS warning lamp turns ON.




Component Function Check
1.CHECK RAS WARNING LAMP FUNCTION
1. Turn ignition switch ON.
2. Make sure that RAS warning lamp lights up.
Is the inspection result normal?
YES - INSPECTION END
NO - Proceed to diagnosis procedure. SEE Diagnosis Procedure.




Diagnosis Procedure
1.PERFORM UNIFIED METER AND A/C AMP. SELF-DIAGNOSIS
With CONSULT-III
Perform "METER/M&A" self-diagnosis.
Is any error system detected?
YES - Check the error system.
NO - GO TO 2.
2.PERFORM SELF-DIAGNOSIS
With CONSULT-III
Perform "4WAS(MAIN)/RAS/HICAS" 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 RAS 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. Turn the ignition switch ON.

CAUTION:
Never start the engine.
4. Select "DATA MONITOR" of "4WAS(MAIN)/RAS/HICAS".
5. Check "WARNING LAMP" item on DATA MONITOR of RAS control unit.
Does the item on "DATA MONITOR" indicate "On"?
YES - GO TO 5.
NO - Replace RAS control unit. RAS Control Unit.
5.CHECK COMBINATION METER
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 RAS CONTROL UNIT
- Record the self-diagnosis results (history).

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