Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Radio DTCs and record on the repair order.
2. With the scan tool, erase DTCs.
3. With the scan tool, read Radio DTCs.
  Did the DTC return?
  
  Yes
  - Go To 3
  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 INSIDE REARVIEW MIRROR
1. Turn the ignition off.
2. Disconnect the Inside Rearview Mirror harness connector.
3. Turn the ignition on.
4. With the scan tool, read Radio DTCs.
  Is the DTC active?
  
  Yes
  - Go To 3
  No
  - Replace the Inside Rearview Mirror in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE (X712) MICROPHONE 1 IN (+) AND THE (X792) MICROPHONE 1 IN (-) CIRCUITS FOR A SHORT TOGETHER
1. Turn the ignition off.
2. Disconnect the Radio harness C1 connector.
3. Measure the resistance between the (X712) Microphone 1 IN (+) circuit, and the (X792) Microphone 1 IN (-) circuit at the Radio C1 harness connector.
  Is there continuity between the (X712) Microphone 1 IN (+) circuit and the (X792) Microphone 1 IN (-) circuit?
  
  Yes
  - Repair the (X712) Microphone 1 IN (+) and the (X792) Microphone 1 IN (-) circuits for a short together.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Radio in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .