Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.

TEST FOR AN INTERMITTENT CONDITION
NOTE:
Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB 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 and perform those DTC before proceeding.
  
  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.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  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).
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.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L, POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (Z908) GROUND CIRCUITS FOR AN OPEN/HIGH RESISTANCE
1. Using a 12-volt test light connected to 12 volts, probe the (Z908) Ground circuits at the GPEC Adaptor.
  Does the test light illuminate brightly at each ground circuit?
  
  Yes
  - Go To 4
  No
  - Repair the (Z908) Ground circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L, POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (F942) FUSED IGNITION SWITCH OUTPUT (RUN-START) 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 Ignition Switch Output (Run-Start) circuit at the GPEC Adaptor.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 5
  No
  - Repair the (F942) Fused Ignition Switch Output (Run-Start) circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L, POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (F1) IGNITION OFF/RUN/START CONTROL OUTPUT CIRCUIT FOR AN OPEN OR SHORT
1. Using a 12-volt test light connected to ground, probe the (F1) Ignition Off/Run/Start Control Output circuit at the GPEC Adaptor.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 6
  No
  - Repair the (F1) Ignition Off/Run/Start Control Output circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L,POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (F342) FUSED ASD RELAY OUTPUT CIRCUITS FOR AN OPEN OR SHORT
1. Turn the ignition off
2. Remove the ASD Relay from the Power Distribution Center (PDC).
3. Connect a jumper between terminal 30 and terminal 87 at the ASD Relay connector in the PDC.
4. Turn the ignition on.
5. Using a 12-volt test light connected to ground, probe the (F342) Fused ASD Relay Output circuits at the GPEC Adaptor.
  Does the test light illuminate brightly at each ASD Control Output circuit?
  
  Yes
  - Go To 7
  No
  - Repair the (F342) Fused ASD Relay Output circuit for an open or short.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L,POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (D27) CAN C BUS (+) CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Turn the ignition off.
2. Disconnect the STAR CAN Connector DASH C4 harness connector. and perform the CAN C DASH STAR CONNECTOR REMOVAL process. Refer to STANDARD PROCEDURE .
3. Measure the resistance of the (D27) CAN C Bus (+) circuit between the STAR CAN Connector DASH C4 harness connector and the GPEC Adaptor.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Go To 8
  No
  - Repair the (D27) CAN C Bus (+) circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L,POWERTRAIN VERIFICATION TEST - 6.4L .
CHECK THE (D28) CAN C BUS (-) CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (D28) CAN C Bus (-) circuit between the STAR CAN Connector DASH C4 harness connector and the GPEC Adaptor.
  Is resistance below 5.0 Ohms?
  
  Yes
  - Replace the Powertrain Control Module in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L,POWERTRAIN VERIFICATION TEST - 6.4L .
  No
  - Repair the (D28) CAN C Bus (-) circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST - 5.7L,POWERTRAIN VERIFICATION TEST - 6.4L .