B148C

B148C-STEERING WHEEL CONTROL DOWN SWITCH CIRCUIT

For a complete wiring diagram, refer to the wiring information Electrical Diagrams.

Theory of Operation

The Steering Wheel Control Down Switch, when pressed, sends a multiplexed signal to the Right Steering Switch. The switching status is transferred to the Steering Control Module (SCM) by way of the LIN bus, a serial sub-bus. The SCM converts the data to CAN(B) and sends the message to the corresponding module on the bus.

- When Monitored:
Continuously with the ignition on.

- Set Condition:
The Steering Control Module senses that the Steering Wheel Control Down Switch is in the Set position for greater than 50 seconds.





CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Press the DOWN switch three times.
4. Wait one minute.
5. With the scan tool, read DTCs.

Does the scan tool display this DTC as Active?

Yes

- Replace the Left Steering Switch.
- Perform the BODY VERIFICATION TEST Body Verification Test.

No

- Test complete.