Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. turn the ignition on.
2. Apply the Brake Pedal.
3. With the scan tool, read the Body Control Module (BCM) DTCs and record on the repair order.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - 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. If no problems are found, test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE BRAKE TRANSMISSION SHIFT INTERLOCK (BTSI) SOLENOID
1. Turn the ignition off to the lock position.
2. Disconnect the Shifter Lever Assembly harness connector.
3. Turn the ignition on.
4. With the scan tool, actuate the BTSI Solenoid.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
5. Using a 12-volt test light connected to ground, check the (K321) BTSI Control circuit at the Shifter Lever Assembly harness connector.
  Does the test light illuminate brightly on and off while cycling the actuator?
  
  Yes
  - Replace the Shifter Lever Assembly in accordance with the Service Information. Refer to CONSOLE, FLOOR, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (K321) BTSI CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Disconnect the BCM C5/E harness connector.
3. Check for continuity between ground and the (K321) BTSI Control circuit.
  Is there continuity between ground and the (K321) BTSI Control circuit?
  
  Yes
  - Repair the short to ground in the (K321) BTSI Control circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the BCM in accordance with the Service Information. Refer to MODULE, BODY CONTROL (BCM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .