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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 601 (3.0L Diesel - DTCS P05EF-00 To P2002-00 - 1500) >> Diagnosis And Testing >> P0683-00-Glow Plug Control Module 1 To Pcm Communication Circuit >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2014 RAM 1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. DTC IS ACTIVE 
    1. Ignition on, engine not running.
    2. With the scan tool, erase DTCs in the PCM.
    3. Turn the ignition off. Leave the ignition off for 5 minutes.
    4. Start the engine.
    5. Allow the engine to run for 2 minutes.
    6. With the scan tool, select View DTCs.

      Is the status Active for this DTC?

      Yes 

      • Go To  2

      No 

  2. GENERATOR 
    1. Turn the ignition off. Leave it off for 5 minutes.
    2. Disconnect the Generator Module harness connector.
    3. Ignition on, engine not running.
    4. With the scan tool, erase DTCs in the PCM.
    5. Crank the engine for no more than 10 seconds if it will not start.
    6. With the scan tool, select View DTCs.

      Is DTC U0407 active?

      Yes 

      • Go To  3

      No 

      • Replace the Generator in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  3. CHECK THE (D511) LIN BUS CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Glow Plug Module harness connector.
    3. Disconnect the PCM C1 harness connector.
    4. Measure the resistance between the (D511) LIN Bus circuit and all other circuits on the PCM C1 harness connector at the PCM C1 harness connector.

      Is the resistance above 10k Ohms on all other circuits?

      Yes 

      • Go To  4

      No 

      • Repair the (D511) LIN Bus circuit for a short to the circuit that measured less than 10k Ohms.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  4. CHECK THE (D511) LIN BUS CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance between ground and the (D511) LIN Bus circuit at the Glow Plug Module harness connector.

      Is the resistance above 10k Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (D511) LIN Bus circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  5. CHECK THE (D511) LIN BUS CIRCUIT FOR AN OPEN/HIGH RESISTANCE 
    1. Measure the resistance of the (D511) LIN Bus circuit between the Glow Plug Module harness connector and the PCM C1 harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (D511) LIN Bus circuit for an open/high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  6
  6. CHECK THE (F343) ASD SUPPLY CIRCUIT, (A29) FUSED B+ CIRCUIT AND THE (Z909) GLOW PLUG MODULE GROUND CIRCUIT FOR A SHORT TO GROUND OR AN OPEN/HIGH RESISTANCE 
    1. Reconnect the PCM C1 harness connector.
    2. Turn the engine on.
    3. Turn the ignition on, engine off.
    4. Measure the voltage across the (F343) ASD Supply circuit and the (Z909) Glow Plug Module Ground circuit at the Glow Plug Module harness connector. Then, measure the voltage across the (A29) Fused B+ circuit and the (Z909) Glow Plug Module Ground circuit at the Glow Plug Module harness connector.

      Was the difference of either voltage reading greater than 1.0 Volts of battery voltage?

      Yes 

      • Repair the (F343) ASD Supply circuit or the (A29) Fused B+ circuit for an open or short to ground, or check the (Z909) Ground circuit for an open.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go To  7
  7. CHECK FOR DAMAGED WIRES OR DAMAGED TERMINALS 
    1. Turn the ignition off.
    2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Glow Plug Module and the PCM.
    3. Look for any chafed, pierced, pinched, or partially broken wires.
    4. Look for broken, bent, pushed out or corroded terminals.

      Were any problems found?

      Yes 

      No 

      • Go To  8
  8. GLOW PLUG MODULE 
    1. Replace the Glow Plug Module in accordance with the service information.
    2. Turn the ignition on.
    3. With the scan tool, erase PCM DTCs.
    4. Turn the ignition off. Leave the ignition off for 5 minutes.
    5. Start the engine.
    6. Allow the engine to run for 2 minutes.
    7. With the scan tool, read PCM DTCs.

      Does the scan tool display this DTC?

      Yes 

      • Replace the Powertrain Control Module in accordance with the service information. Refer to REMOVAL .
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

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