Diagnostic Test

WARNING: This page is about a different car, the 2016 Dodge Durango. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR INTERMITTENT CONDITION
NOTE:
Check for any Service Bulletin(s) related to the condition. If a Service Bulletin applies, perform the procedure outlined in the Service Bulletin before continuing.
1. Turn the ignition on.
  NOTE:
  Make sure the battery voltage is between 10.0 and 16.0 volts.
2. With the scan tool, read the module status.
  NOTE:
  Check the BCM for any active CAN hardware DTCs, perform DTC before proceeding. Refer to the DTC INDEX article.
  
  Does the scan tool indicate that the module is active on the bus?
  
  Yes
  - The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
  No
  - Go To 2
CHECK THE (A209) FUSED B(+) CIRCUIT FOR AN OPEN OR SHORT
1. Turn the ignition off.
2. Disconnect the PCM C1 harness connector.
  CAUTION:
  Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.
3. Connect the (special tool #10436, Adapter, GPEC Diagnostic) in-line with the PCM C1 connector.
4. Using a 12-volt test light connected to ground, probe the (A209) Fused B(+) circuit at the GPEC Adaptor.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the (A209) Fused B(+) circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance .
CHECK THE (Z903) GROUND CIRCUITS FOR AN OPEN
1. Using a 12-volt test light connected to 12 volts, probe the (Z903) Ground circuits at the GPEC Adaptor.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (Z903) Ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance .
CHECK THE (F942) FUSED RUN-START RELAY OUTPUT CIRCUIT FOR AN OPEN OR SHORT
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, probe the (F942) Fused Run-Start Relay Output circuit at the GPEC Adaptor.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the (F942) Fused Run-Start Relay Output circuit for an open or short to ground.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance .
CHECK THE (D27) AND (D28) CAN C BUS CIRCUITS FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the Star CAN C Dash C2 harness connector.
3. Measure the resistance of the (D27) CAN C Bus (+) circuit between the Star CAN C Dash C2 harness connector and the GPEC Adaptor.
4. Measure the resistance of the (D28) CAN C Bus (-) circuit between the Star CAN C Dash C2 harness connector and the GPEC Adaptor.
  Are the resistances below 3.0 Ohms?
  
  Yes
  - Replace and program the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance .
  No
  - Repair the (D27) or (D28) CAN C Bus circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to the appropriate Diagnostics & Testing article in Engine Performance .