B1504

B1504-2A-LEFT STEERING WHEEL CONTROL SWITCH - STUCK

For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The Left Steering Wheel Control Switch is used to control the Electronic Vehicle Information Center (EVIC) in the Cluster. The switch is hardwired to the Right Steering Wheel Control Switch (Speed Control Switch). The Right Steering Wheel Control Switch (Speed Control Switch) transmits Left Steering Wheel Control Switch information to the Steering Angle Sensor (SAS) (integral to the Steering Column Control Module) via the LIN Bus. The SAS then converts this data to a CAN Bus signal and broadcasts the message to the corresponding module on the bus.

- When Monitored:
Continuously with the ignition on.

- Set Condition:
The Steering Column Control Module (SCCM) senses that the Left Steering Wheel Control Switch is in the Set position for greater than 20 seconds. Phone related switches have a set time of 600 seconds.





CHECK FOR AN ACTIVE DTC

NOTE: Before proceeding with the diagnostic procedure, verify that the connections are properly made, seated and verify proper pin terminal tension. A loose connection at any of the SCCM connectors may cause the DTC to set.

1. Turn the ignition on.

NOTE: Check for a stuck Left Steering Wheel Control Switch.

2. Press each switch on the Left Steering Wheel Switch assembly twice. (The scan tool can be used to monitor switch status. Status can be viewed in the SCCM data display.)
3. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- WARNING: Turn the ignition off disconnect the 12-volt battery and wait two minutes before proceeding. Failure to follow these instructions may result in possible serious or fatal injury.
WARNING: Do not place an intact non-deployed airbag face down on a hard surface, the airbag propels into the air if accidentally deployed. Failure to follow these instructions may result in possible serious or fatal injury.
NOTE: Visually and physically inspect the wiring harness between the Left Steering Wheel Control Switch harness connector and the Right Steering Wheel Control Switch (Speed Control Switch) harness connector. Repair any damaged wires, connectors, and open/spread terminals. If harness is OK, proceed with test.

- Replace the Left Steering Wheel Control Switch. Electronic Vehicle Information Center Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Test complete, the condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
- Perform the BODY VERIFICATION TEST. Body Verification Test.