Diagnostic Test

WARNING: This page is about a different car, the 2016 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the PCM.
3. Start the engine.
4. Allow the engine to reach normal operating temperature.
5. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Refer to STORED LOST COMMUNICATION DTCS and perform the Stored Lost Communication DTCs diagnostic procedure.
CHECK (A801) 12-VOLT SUPPLY FOR OPEN/HIGH RESISTANCE
1. Turn the ignition off.
  NOTE:
  The 12-Volt Supply circuit to the Generator is a B+ circuit. The voltage supply comes directly from the Battery through a Maxi-Fuse located near the Battery.
2. With a 12-volt test light connected to ground, check the (A801) 12-Volt Supply circuit at the Generator B+ post.
  Does the test light illuminate as brightly as a direct probe of the Battery?
  
  Yes
  - Go To 3
  No
  - Repair the (A801) 12-Volt Supply circuit for an open/high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
GLOW PLUG MODULE
1. Turn the ignition off.
2. Unplug the Glow Plug Module.
3. Turn the ignition on.
4. With the scan tool, select View DTCs.
  Did the DTC remain active?
  
  Yes
  - Go To 4
  No
  - Replace the Glow Plug Module in accordance with the service information. Refer to MODULE, GLOW PLUG, 3.0L DIESEL
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
ACTIVE GRILL SHUTTER MODULE (IF EQUIPPED)
1. Turn the ignition off.
2. Unplug the Active Grill Shutter Module (if equipped).
3. Turn the ignition on.
4. With the scan tool, select View DTCs.
  Did the DTC remain active?
  
  Yes
  - Go To 5
  No
  - Replace the Active Grill Shutter Module in accordance with the service information.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (D511) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition off.
2. Disconnect the Generator C1 harness connector.
3. Disconnect the PCM C1 harness connector.
4. Remove the ASD Relay.
5. Connect a jumper between terminal 30 and terminal 87.
6. Turn the ignition on.
7. Measure the voltage of the (D511) LIN BUS circuit at the Generator C1 harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the (D511) LIN BUS circuit for a short to voltage.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 6
CHECK THE (D511) LIN BUS CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Remove the jumper.
3. Reinstall the ASD Relay.
4. Measure the resistance between ground and the (D511) LIN BUS circuit at the Generator C1 harness connector.
  Is the resistance above 10k Ohms?
  
  Yes
  - Go To 7
  No
  - Repair the (D511) LIN BUS circuit for a short to ground.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE (D511) LIN BUS CIRCUIT FOR AN OPEN/HIGH RESISTANCE
1. Measure the resistance of the (D511) LIN BUS circuit between the Generator C1 harness connector and the PCM C1 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 8
  No
  - Repair the (D511) LIN BUS circuit for an open or high resistance.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
GENERATOR
1. Replace the Generator in accordance with the Service Information. Refer to GENERATOR .
2. Reconnect the PCM C1 harness connector.
3. Reconnect the Generator C1 harness connector.
4. Start the engine.
5. Allow the engine to reach normal operating temperature.
6. With the scan tool, select View DTCs.
  Did the DTC return?
  
  Yes
  - Go To 9
  No
  - Test complete
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
POWERTRAIN CONTROL MODULE
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator and the Powertrain Control Module.
2. Look for any chafed, pierced, pinched, or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Replace the Powertrain Control Module in accordance with the service information. Refer to DIESEL, PCM REMOVAL .
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .