LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 337 (Can Communication System - Non-DTC Diagnostics) >> Diagnosis and Testing >> No Response From ECM (Engine Control Module) - Diesel >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2010 Dodge Charger and 2010 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. TEST FOR INTERMITTENT CONDITION 
    1. Turn the ignition on.
      NOTE: Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.
    2. With the scan tool, select ECU View.
      NOTE: A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
      NOTE: Check the TIPM for any active CAN C hardware and any ignition related DTCs, perform DTCs before proceeding.

      Does the scan tool display a red "X" next to the module?

      Yes 

      • Go to step  2

      No 

      • 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.
  2. CHECK ECM POWER AND GROUND 
    1. Check the ECM power and ground circuits.

      Were any problems found?

      Yes 

      • Repair as necessary.
      • Perform the ECM VERIFICATION TEST.

      No 

      • Go to step  3
  3. (D65) CAN C BUS (+) CIRCUIT OPEN 
    Fig 1: Measuring Resistance Of CAN C Bus (+) Circuit Between TIPM Harness Connector & ECM Harness Connector
    GC0098151Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the TIPM C6 harness connector.
    3. Disconnect the ECM C2 harness connector.
    4. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM harness connector and the ECM harness connector.

      Is resistance below 5.0 Ohms?

      Yes 

      • Go to step  4

      No 

      • Repair the (D65) CAN C Bus (+) circuit for an open.
      • Perform the ECM VERIFICATION TEST.
  4. (D64) CAN C BUS (-) CIRCUIT OPEN 
    Fig 2: Measuring Resistance Of CAN C Bus (-) Circuit Between TIPM Harness Connector & ECM Connector
    GC0098152Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM harness connector and the ECM connector.

      Is resistance below 5.0 Ohms?

      Yes 

      • Replace and program the Engine Control Module in accordance with the Service Information.
      • Perform the ECM VERIFICATION TEST.

      No 

      • Repair the (D64) CAN C Bus (-) circuit for an open.
      • Perform the ECM VERIFICATION TEST.
scientia non olet · About LEMON Manuals