Pinpoint Test I: The Steering Wheel Switch(Es) Illumination Is Inoperative Or Always On (Without Active Front Steering)
- Refer to CLUSTER AND PANEL ILLUMINATION
for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Instrument Panel and Interior Switches Illumination .
Possible Sources
- Wiring, terminals or connectors
- Steering wheel switch(es)
- Paddle shift switch(es)
- Clockspring
- Steering wheel
- WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
- I1 INSPECT THE NON-NETWORKED ILLUMINATION COMPONENTS
- Ignition ON.
- Place the headlamp switch in the PARKING LAMPS ON position.
- While pressing the illumination dim up and dim down switch, monitor the non-networked illumination components.
Are all of the non-networked illumination sources inoperative or always on?
Yes If all non-networked illumination sources are inoperative, GO to Pinpoint Test C If all non-networked illumination sources are always on, GO to Pinpoint Test E No If all steering wheel switch illumination is inoperative, GO to I2 If only one steering wheel switch is inoperative, GO to I5 - I2 CHECK FOR ILLUMINATION VOLTAGE AT THE CLOCKSPRING
- Ignition OFF.
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering
- Remove the driver airbag. REFER to: Driver Airbag
- Disconnect Clockspring C218A.
- Place a light source over the ambient light sensor so the illumination can reach maximum brightness.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Ignition ON.
- Press the illumination dim up switch to the full illumination position.
- Measure:
Positive Lead Measurement / Action Negative Lead C218A-1 Ground
Is the voltage greater than 10 volts?
Yes GO to I3 No REPAIR the circuit - I3 CHECK THE ILLUMINATION GROUND CIRCUIT
Is the voltage greater than 10 volts?
Yes GO to I4 No REPAIR the circuit. - I4 CHECK THE CLOCKSPRING
- Ignition OFF.
- Connect C218A.
- Disconnect C218B.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C218B pin 1 (component side) C218B pin 11 (component side)
Is the voltage greater than 10 volts?
Yes INSTALL a new steering wheel. REFER to: Steering Wheel No INSTALL a new clockspring. REFER to: Clockspring - I5 CHECK THE STEERING WHEEL HARNESS VOLTAGE CIRCUIT FOR AN OPEN
- Ignition OFF.
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering
- Remove the driver airbag. REFER to: Driver Airbag
- Disconnect faulty switch.
- Disconnect Clockspring C218B.
- Measure:
LH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-11 C2490-8 RH steering wheel switch
Positive Lead Measurement / Action Negative Lead C218B-11 C2491-8 Downshift Paddle Switch
Positive Lead Measurement / Action Negative Lead C218B-11 C2429-1 Upshift Paddle Switch
Positive Lead Measurement / Action Negative Lead C218B-11 C2428-4
Is the resistance less then 3 ohms?
Yes GO to I6 No INSTALL a new steering wheel. REFER to: Steering Wheel - I6 CHECK THE STEERING WHEEL HARNESS GROUND CIRCUIT FOR AN OPEN
- Measure:
LH Steering Wheel Switch
Positive Lead Measurement / Action Negative Lead C218B-1 C2490-2 RH Steering Wheel Switch
Positive Lead Measurement / Action Negative Lead C218B-1 C2491-2 Downshift Paddle Switch
Positive Lead Measurement / Action Negative Lead C218B-1 C2429-2 Upshift Paddle Switch
Positive Lead Measurement / Action Negative Lead C218B-1 C2428-3
Is the resistance less then 3 ohms?
Yes INSTALL a new steering wheel switch. REFER to: Steering Wheel Multifunction Switch . If the downshift paddle switch is faulty, INSTALL a new switch. REFER to: Downshift Paddle Switch . If the upshift paddle switch is faulty, INSTALL a new switch. REFER to: Upshift Paddle Switch No INSTALL a new steering wheel. REFER to: Steering Wheel - Measure: