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 BATTERY VOLTAGE TO THE RADIO WITH THE SCAN TOOL
1. With the scan tool in Data Display, read the Radio battery voltage.
  Is the battery voltage less than 8.5 volts?
  
  Yes
  - Go To 3
  No
  - Replace the Radio in accordance with the Service information. Refer to MODULE, RADIO RECEIVER, REMOVAL AND INSTALLATION .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE BATTERY VOLTAGE TO THE RADIO
1. Disconnect the Radio C1 harness connector.
  NOTE:
  Check the Radio harness connector for signs of corrosion, pushed out or bent terminals, and correct pin tension.
2. Measure the voltage between ground and the (A933) Fused B+ circuit at the Radio C1 harness connector.
  Is the battery voltage less than 8.5 volts?
  
  Yes
  - Go To 4
  No
  - Repair the (A933) Fused B+ circuit for high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK RADIO GROUND
1. With a 12-volt test light connected to 12 volts, check the (Z921) Ground circuit at the Radio C1 harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the open or high resistance on the (Z921) Ground circuit.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR CHARGING SYSTEM RELATED DTCS IN THE POWERTRAIN CONTROL MODULE (PCM)
1. With the scan tool in ECU View, select PCM and check for any Charging System related DTCs.
  Does the scan tool display any Charging System related DTCs?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX and perform the appropriate charging system or battery DTC diagnostic procedure.
  No
  - Test Complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .