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Diagnostic Aids

By manipulating the harnesses at the various connectors it is often possible to isolate the cause of the circuit interruption. This harness can then be removed and repaired. Inspect for any damage to the harness which could cause an intermittent open or short to ground or backed out terminals at the instrument cluster connectors, broken connector locks, improperly formed or damaged terminals. The multimeter allows continuity of the wiring harness circuit 1061 to be checked.

DTC 15 - NO SERIAL DATA FROM AUDIO SYSTEM

Step Action Value(s) Yes No
1 Did you perform the Instrument Cluster Diagnostic System Check? - Go to Step 2  Go to Diagnostic System Check - Instrument Cluster 
2
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. With the scan tool, observe the Radio Data display.
Does the Tech 2 display Radio information?		 - Go to Step 3  Go to Scan Tool Does Not Communicate with UART Data Line in Data Link Communications
3
  1. Remove the instrument cluster.
  2. Remove the radio head unit.
  3. Inspect continuity in the Secondary universal asynchronous receiver transmitter (UART) Serial Data circuit between the radio and the instrument panel (I/P). Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and complete the repair?		 - Go to Step 4  Go to Step 4 
4
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 - Go to Step 2  System OK
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