Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on and open one of the front doors.
  NOTE:
  A front door must remain open whenever checking or erasing Radio DTCs.
2. With the scan tool, read Radio DTCs and record on the repair order.
3. With the scan tool, erase DTCs.
4. Cycle the ignition switch from on to off, wait five seconds and then back to on.
5. With the scan tool, read Radio DTCs.
  Did the DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK THE (J107) VIDEO CABLE CONNECTIONS
1. Turn the ignition off.
2. Inspect the video cable connection at the rear of the Display Screen Module (DSM).
3. Inspect the video cable connection at the rear of the Radio.
  Is the video cable connection secure and undamaged?
  
  Yes
  - Go To 3
  No
  - Repair the video cable connection as needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
TEST THE (J107) LVDS CABLE
1. Connect the 9977-6-14 HSD-LVDS Adapter test cable between the Radio and DSM.(special tool #9977-6-14, Adapter, HSD-LVDS 4-Pin)
2. Turn the ignition on.
3. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 4
  No
  - Replace the Low Voltage Differential Signal (LVDS) Video Cable in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
TEST THE RADIO
NOTE:
To continue with this test, you must secure a Known Good Radio.
1. Turn the ignition off.
2. Connect a known good Radio to the LVDS cable.
3. With the scan tool, erase DTCs.
4. Turn the ignition on.
5. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Replace the Display Screen Module (DSM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Replace the Radio in accordance with the Service Information. Refer to RADIO, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .