B12CB-12

B12CB-12-CRUISE CONTROL SWITCH - CIRCUIT SHORT TO BATTERY

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 voltage 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. CHECK THE (V71) CRUISE CONTROL SWITCH SENSE CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Body Control Module C3 harness connector.
3. Turn the ignition on.
4. Measure the voltage of the (V71) Cruise Control Switch Sense circuit in the C3 harness connector.

Is the voltage present?

Yes

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

No

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