B12CB-11

B12CB-11-CRUISE CONTROL SWITCH - CIRCUIT SHORT TO GROUND

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

Theory of Operation
The Speed Control Switch Pod is a resistor multiplexed unit that provides hard wired inputs to the Body Control Module (BCM) microprocessor. The BCM relays the speed control switch inputs to the Powertrain Control Module (PCM) over the Controller Area Network (CAN) data bus. The speed control switch pod is located in the right spoke of the steering wheel. This switch has four push buttons and is used on all vehicles equipped with the speed control (also known as cruise control) system. The only visible components of the switch pod are the switch push buttons. The remainder of the switch pod including its mounting provisions and its electrical connection are concealed beneath the switch buttons within the steering wheel.
- When Monitored:
With the ignition on.

- Set Condition:
The Body Control Module (BCM) detects a short to ground on the Cruise Control Switch Sense circuit.





1. CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read DTCs.

Does the scan tool display this DTC as active?

Yes

- Go To 2

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.

2. SPEED CONTROL SWITCH

NOTE: Visually inspect the Steering Wheel Wiring Harness, repair as necessary.

1. Turn the ignition off.
2. Disconnect the Speed Control Switch harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display DTC: B12CB-11-CRUISE CONTROL SWITCH - CIRCUIT SHORT TO GROUND as active?

Yes

- Go To 3

No

- Replace the Speed Control Switch. Speed Control Switch - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

3. CLOCKSPRING
1. Turn the ignition off.
2. Disconnect the Clockspring C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, read DTCs.

Does the scan tool display DTC: B12CB-11-CRUISE CONTROL SWITCH - CIRCUIT SHORT TO GROUND as active with the Clockspring C1 harness connector unplugged?

Yes

- Go To 4

No

- Replace the Clockspring. Clockspring - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

4. CHECK FOR A SHORT BETWEEN THE (V71) CRUISE CONTROL SWITCH SENSE CIRCUIT AND THE (X920) RADIO/CRUISE/HORN RETURN CIRCUIT
1. Turn the ignition off.
2. Measure the resistance between the (V71) Cruise Control Switch Sense circuit and the (X920) Radio/Cruise/Horn Return circuit at the Clockspring C1 harness connector.

Is the resistance above 10K Ohms?

Yes

- Go To 5

No

- Repair the short between the (V71) Cruise Control Switch Sense circuit and the (X920) Radio/Cruise/Horn Return circuit in the wiring harness.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

5. CHECK THE (V71) CRUISE CONTROL SWITCH SENSE CIRCUIT FOR A SHORT TO GROUND
1. Measure the resistance between ground and the (V71) Cruise Control Switch Sense circuit at the Clockspring C1 harness connector.

Is the resistance above 10K Ohms?

Yes

- Replace Body Control Module (BCM). Body Control Module - Removal.
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Repair the (V71) Cruise Control Switch Sense circuit for a short to ground.
- Perform the BODY VERIFICATION TEST. Body Verification Test.