Pinpoint Test E : The Steering Wheel Switch(Es) Illumination Is Inoperative Or Always On
- Cluster and Panel Illumination for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Instrument Panel and Interior Switches Illumination - System Operation and Component Description .
Possible Sources
- Wiring, terminals or connectors
- Steering wheel switch
- Clockspring
- Steering wheel
- Driver airbag
- E1 CHECK IF ALL THE STEERING WHEEL ILLUMINATED SWITCHES ARE INOPERATIVE
- Ignition OFF.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Press and hold the instrument panel dimmer up switch until the dimmable illumination is at full intensity.
- Check the operation of the dimmable steering wheel switches.
Is any steering wheel switch illuminated?
Yes GO to E6 No GO to E2 - E2 CHECK THE HORN OPERATION
- Check the operation of the traffic horn.
Does the traffic horn operate?
Yes GO to E3 No REFER to: Horn . - E3 CHECK FOR ILLUMINATION VOLTAGE SUPPLY CIRCUIT FOR AN OPEN
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
- Disconnect Clockspring C218A.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Press and hold the instrument panel dimmer up switch until the dimmable illumination is at full intensity.
- Measure:
Vehicles Not Equipped With Adaptive Steering
Positive Lead Measurement / Action Negative Lead Refer to C218A-9 Ground Vehicles Equipped With Adaptive Steering
Positive Lead Measurement / Action Negative Lead Refer to C218A-4 Ground
Is the voltage greater than 11 volts?
Yes For vehicles not equipped with adaptive steering, GO to E4 For vehicles Equipped with adaptive steering, GO to E5 No REPAIR the circuit. - E4 CHECK THE CLOCKSPRING (VEHICLES NOT EQUIPPED WITH ADAPTIVE STEERING)
- Place the headlamp switch in the OFF position.
- Connect Clockspring C218A.
- Remove the driver airbag. REFER to: Driver Airbag .
- Disconnect Clockspring C218B.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead Clockspring C218B, pin 11, component side Clockspring C218B, pin 1, component side
Is the voltage greater than 11 volts?
Yes INSTALL a new steering wheel. REFER to: Steering Wheel . No INSTALL a new clockspring. REFER to: Clockspring . - E5 CHECK THE CLOCKSPRING (VEHICLES EQUIPPED WITH ADAPTIVE STEERING)
- Place the headlamp switch in the OFF position.
- Connect Clockspring C218A.
- Remove the steering wheel. REFER to: Steering Wheel - Vehicles With: Adaptive Steering .
- Disconnect Clockspring C218B.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead Clockspring C218E, pin 3, component side Clockspring C218E, pin 4, component side
Is the voltage greater than 11 volts?
Yes INSTALL a new steering wheel. REFER to: Steering Wheel - Vehicles With: Adaptive Steering . No INSTALL a new clockspring. REFER to: Clockspring - Vehicles With: Adaptive Steering . - E6 CHECK FOR VOLTAGE TO THE SUSPECT STEERING WHEEL SWITCH
- Place the headlamp switch in the OFF position.
- Depower the SRS. REFER to: Supplemental Restraint System (SRS) Depowering .
- Disconnect the suspect steering wheel switch.
- Place the headlamp switch in the PARKING LAMPS ON position.
- Measure:
Left Upper Steering Control Switch
Positive Lead Measurement / Action Negative Lead C2998-4 C2998-1 Right Upper Steering Control Switch
Positive Lead Measurement / Action Negative Lead Refer to C2491-4 Refer to C2491-1 Left Lower Steering Control Switch (without cruise control)
Positive Lead Measurement / Action Negative Lead C2429-6 C2429-1 Left Lower Steering Control Switch (with cruise control)
Positive Lead Measurement / Action Negative Lead Refer to C2366-6 Refer to C2366-1 Right Lower Steering Control Switch
Positive Lead Measurement / Action Negative Lead C2367-6 C2367-1
Is the voltage greater than 11 volts?
Yes INSTALL a new steering wheel switch in question. REFER to: Steering Wheel Multifunction Switch . No INSTALL a new steering wheel. REFER to: Steering Wheel . or REFER to: Steering Wheel - Vehicles With: Adaptive Steering .