Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on and open one of the Rear doors.
  NOTE:
  A front door must remain open whenever checking or erasing Radio DTCs.
2. With the scan tool, record and erase the Radio DTCs.
3. Cycle the ignition switch from on to off, wait five seconds and then back to on.
4. Turn the Radio on and set the volume to 25.
5. Adjust the speakers to the Rear and center.
6. With the scan tool, read Radio 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.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE AMPLIFIER
1. Make sure one of the front doors is still open.
2. With the scan tool, erase the DTCs.
3. Turn the ignition off.
4. Disconnect the Amplifier C1 harness connector.
5. Turn the ignition on.
6. Turn the radio on and set the volume to 25.
7. With the scan tool, read Radio DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Replace the Amplifier in accordance with the Service Information. Refer to AMPLIFIER, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X51) LEFT REAR AUDIO (+) CIRCUIT, AND THE (X57) LEFT REAR AUDIO (-) CIRCUITS FOR A SHORT TOGETHER
1. Disconnect the Radio C1 harness connector.
2. Check for continuity between the (X51) Left Rear Audio (+) circuit, and the (X57) Left Rear Audio (-) circuit at the Radio C1 harness connector.
  Is there continuity between the (X51) Left Rear Audio (+) circuit, and the (X57) Left Rear Audio (-) circuit?
  
  Yes
  - Repair the (X51) Left Rear Audio (+) circuit, and the (X57) Left Rear Audio (-) circuit for a short together.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Radio in accordance to the service information. Refer to RADIO, REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .