Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. With the scan tool, read Display Screen Module (DSM) DTCs and record on the repair order.
2. With the scan tool, erase the DTC.
3. Wait 60 seconds.
4. Turn the DSM on.
5. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Test complete.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE BATTERY VOLTAGE TO THE DSM
1. Disconnect the DSM C1 harness connector.
  NOTE:
  Check the DSM harness connector for signs of corrosion, pushed out or bent terminals, and correct pin tension.
2. Measure the voltage between ground and the Fused B+ circuit at the DSM C1 harness connector.
  Is the battery voltage less than 9.0 volts?
  
  Yes
  - Go To 3
  No
  - Go To 4
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 BODY CONTROL MODULE (BCM) - DIAGNOSTIC CODE INDEX and perform the appropriate charging system or battery DTC diagnostic procedure.
  No
  - Check for voltage drop concerns across the Fused B+ circuit and repair as needed.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK THE GROUND CIRCUIT TO THE DSM FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the DSM C1 harness connector.
  NOTE:
  Check the DSM harness connector for signs of corrosion, pushed out or bent terminals, and correct pin tension.
3. Measure the resistance of the ground circuit between DSM harness connector and ground.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Replace the Display Screen Module (DSM) in accordance with the Service information. Refer to MODULE, DISPLAY SCREEN (DSM), REMOVAL .
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Repair the ground circuit for an open or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .