INSPECTION PROCEDURE 4: 4WD system check screen is displayed on the center of the multi-information display and a "4WD" symbol flashes at the left top. But no diagnostic trouble codes are stored.
COMMENTS ON TROUBLE SYMPTOM
- When a 4WD system check screen is displayed on the center of the multi-information display and a "4WD" symbol flashes at the left top without storing any diagnostic trouble codes, the power supply to the AWC-ECU may be defective.
- When the power supply voltage to the AWC-ECU drops under approx. 6 V, the ECU cannot store any diagnostic trouble codes due to the poor power supply. In this case, the combination meter will determine that the AWC-ECU is timed out, and then display "4WD system check" at the center of the multi-information display and make "4WD" symbol flash at the left top.
PROBABLE CAUSES
- Damaged wiring harness and connectors
- Malfunction of AWC-ECU
DIAGNOSTIC PROCEDURE
1. Check the Inspection Procedure 5: Malfunction of power supply circuit system. (Refer to 
) 2. Check the trouble symptom.
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