Diagnostic Test

CHECK FOR AN ACTIVE DIAGNOSTIC TROUBLE CODE (DTC)
1. Turn the ignition on.
2. With the scan tool, read Body Control Module (BCM) DTCs and record on the repair order.
3. Record the Environmental Data.
4. With the scan tool, erase DTCs.
5. Turn the ignition off.
6. Wait 10 seconds.
7. Turn the ignition on.
8. Press and release the Speed Control Switches three times.
9. With the scan tool, read BCM DTCs.
  Did the DTC return?
  
  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.
CHECK FOR VOLTAGE ON THE (V72) S/C SIGNAL 2 CIRCUIT
NOTE:
Inspect the wiring harness between the SCM and Right Steering Wheel (Speed Control) Switch for any damage or loose connections. Repair as necessary.
1. Turn the ignition off.
2. Disconnect the Right Steering Wheel (Speed Control) Switch harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (V72) S/C Signal 2 circuit at the Right Steering Wheel Switch harness connector.
  Is there any voltage present?
  
  Yes
  - Go To 7
  No
  - Go To 3
CHECK THE SPEED CONTROL SWITCH
1. Turn the ignition off.
2. Perform the Right Steering Wheel (Speed Control) Switch functionality test. Refer to DIAGNOSIS AND TESTING - SPEED CONTROL SWITCH .
  Does the Right Steering Wheel (Speed Control) Switch operate correctly?
  
  Yes
  - Go To 4
  No
  - Replace the Right Steering Wheel (Speed Control) Switch in accordance with the Service Information. Refer to SWITCH, SPEED CONTROL, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR AN OPEN OR HIGH RESISTANCE BETWEEN THE RIGHT STEERING WHEEL SWITCH AND SCM
1. Disconnect the SCM C4 harness connector.
2. Measure the resistance of the (V72) S/C Signal 2 circuit between the Right Steering Wheel Switch harness connector and SCM C4 harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the (V72) S/C Signal 2 circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 5
CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR AN OPEN OR HIGH RESISTANCE BETWEEN THE SCM AND BCM
1. Disconnect the SCM C1 harness connector.
2. Disconnect the BCM C4 harness connector.
3. Measure the resistance of the (V72) S/C Signal 2 circuit between the SCM C1 harness connector and BCM C4 harness connector.
  Is the resistance above 3.0 Ohms?
  
  Yes
  - Repair the (V72) S/C Signal 2 circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 6
CHECK THE SCM
1. Connect the BCM C4 harness connector.
2. Connect a jumper wire between ground and the (V72) S/C Signal 2 circuit at the SCM C1 harness connector.
3. Turn the ignition on.
4. With the scan tool, read BCM DTCs.
  Does the scan tool display DTC B1075-11-CRUISE CONTROL ON/OFF - CIRCUIT SHORT TO GROUND as active?
  
  Yes
  - Replace the SCM in accordance with the Service Information. Refer to CLOCKSPRING, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Body Control Module (BCM) in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), EMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO VOLTAGE BETWEEN THE RIGHT STEERING WHEEL SWITCH AND SCM
1. Turn the ignition off.
2. Disconnect the SCM C4 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (V72) S/C Signal 2 circuit at the SCM C4 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (V72) S/C Signal 2 circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 8
CHECK THE (V72) S/C SIGNAL 2 CIRCUIT FOR A SHORT TO VOLTAGE BETWEEN THE SCM AND BCM
1. Turn the ignition off.
2. Disconnect the SCM C1 harness connector.
3. Turn the ignition on.
4. Measure the voltage on the (V72) S/C Signal 2 circuit at the SCM C1 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (V72) S/C Signal 2 circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the SCM in accordance with the Service Information. Refer to CLOCKSPRING, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .