Test E: The Steering Wheel Control Switch(es) Illumination Is Inoperative

PINPOINT TEST E: THE STEERING WHEEL CONTROL SWITCH(ES) ILLUMINATION IS INOPERATIVE

E1-E2:

E2-E4:

E4-E5:

E5-E6:

Normal Operation
The lighting control module (LCM) supplies a variable pulse width modulated (PWM) voltage to the steering wheel control switches through circuit 484 (OG/BK). The steering wheel control switches are grounded through circuit 57 (BK).

Possible Causes
- circuit 57 (BK) open
- circuit 484 (OG/BK) open
- audio/climate control switch
- speed control switch
- steering wheel wiring harness
- clockspring