WF-Faulty Warning Light or Harness

DIAGNOSIS
- Faulty D check and read memory harnesses.
- Faulty power supply or GND circuit.
- Faulty warning light or harness.
- Faulty PCM (power steering control module.

SYMPTOM
- Warning light remains off during diagnosis.





1. Check D check and read memory harnesses.
a. Turn ignition switch "OFF.
b. Disconnect PCM from connector.





c. Check continuity between PCM connector and connector (B36). Specified resistance:
- (R91) No. 5-(B36) No. 6/1 ohm. or less
- (R91) No. 6-(B36) No. 5/1 ohm. or less
d. Check connector (R91) terminal and GND. Connector & Terminal/Specified resistance: (R91) No. 13-Body/1 ohm, or less
2. Check warning light system.
a. Disconnect connector (i1). Turn ignition switch "ON."





b. Measure voltage across connector (B40) terminal and GND. Connector & Terminal/Specified voltage: (B40) No. 18-Body/10 V, or more:
- OK - Go to c.
- NOT OK - Open circuit between connector (B40) and PCM terminals
c. Turn ignition switch "OFF."
d. Remove steering warning light (including combination meter).
e. Apply a voltage of 12 volts across warning light terminals to make sure it illuminates.
- OK - Go to f.
- NOT OK - Faulty warning light
f. Disconnect connectors (i6) and (i7).





g. Check continuity between connector (i1) and connector (i7) terminals. Connector & Terminal/Specified resistance: (i1) No. 18-(i7) No. 9/1 ohm. or less
h. Turn ignition switch "ON."





i. Measure voltage across connector (i6) terminal and GND. Connector & Terminal/Specified voltage: (is) No. 3-Body/10 V, or more
- OK - Faulty PCM
- NOT OK - Open circuit between F/B (Fuse Block) and combination meter