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Home >> Chrysler >> 2006 >> Crossfire Base, 2D Convertible >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0301 To P0441 >> Diagnosis And Testing >> P0400 - EGR System Performance >> Diagnostic Test

Diagnostic Test

  1. 1) PRE-DIAGNOSTIC CHECK OUT 
    Fig 1: Connecting Scan Tool & Turning Ignition On
    GC0032455Courtesy of DAIMLERCHRYSLER CORP.
    NOTE: Always perform diagnostics with a fully charged battery.
    NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.
    NOTE: Check for applicable TSBs related to the problem.

    Turn the ignition on.

    With the DRB III®, read PCM DTCs.

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors. Repair as necessary.

    Perform this procedure prior to symptom diagnosis. 

    Continue 

    1. Go To  2).
  2. 2) CHECK FOR CURRENT DTC 
    Fig 2: Connecting Scan Tool & Turning Ignition On
    GC0032455Courtesy of DAIMLERCHRYSLER CORP.
    WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
    NOTE: If the PCM detects and stores a DTC, the PCM also stores the engine/vehicle operating conditions under which the DTC was set. Some of these conditions are displayed on the DRB III® at the same time the DTC is displayed.
    NOTE: Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for a DTC.

    Turn the ignition on.

    With the DRB III®, erase PCM DTCs.

    NOTE: It maybe necessary to road test the vehicle for this DTC to set.

    With the DRB III®, read PCM DTCs.

    Did this DTC set again? 

    Yes 

    1. Go To  3).

    No 

    1. Go To  10).
  3. 3) EGR OPERATION 

    Turn the ignition on.

    Turn all accessories off.

    Start the engine.

    Allow the engine to reach normal operating temperature.

    Does the engine run rough or stall? 

    Yes 

    1. Go To  4).

    No 

    1. Go To  5).
  4. 4) EGR VALVE OPEN AT IDLE 

    Turn the ignition off.

    Disconnect the EGR Solenoid harness connector.

    NOTE: Check connectors - Clean/repair as necessary.

    Start engine. Attempt to allow the engine to idle.

    Does the engine run rough or stall? 

    Yes 

    1. Inspect the EGR tube assembly. If OK, replace the EGR valve. (Refer to EMISSIONS CONTROL/EXHAUST GAS RECIRCULATION/VALVE - REMOVAL) .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .

    No 

    1. Go To  5).
  5. 5) EGR SOLENOID 
    Fig 3: Checking EGR Circuits
    GC0034241Courtesy of DAIMLERCHRYSLER CORP.
    NOTE: Check the Engine Control Fuse 2 in the Relay Control Module. If it is open, multiple DTCs will be set in the PCM. Determine the cause of the open fuse before continuing using the wiring diagrams/schematics as a guide.

    Turn the ignition off.

    Disconnect the EGR solenoid harness connector.

    NOTE: Check connectors - Clean/repair as necessary.

    Connect a 12-volt test lamp between the EGR Solenoid Control circuit and the Fused Engine Control Relay Output circuit.

    Turn the ignition on.

    With the DRB III®, actuate the EGR VAC TRANSDUCER.

    Does the test light flash on and off? 

    Yes 

    1. Replace the EGR Solenoid. (Refer to EMISSIONS CONTROL/EXHAUST GAS RECIRCULATION/SOLENOID - REMOVAL) .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .

    No 

    1. Go To  6).
  6. 6) FUSED ENGINE CONTROL RELAY OUTPUT CIRCUIT OPEN 
    Fig 4: Checking Engine Control Relay Output Circuit
    GC0034242Courtesy of DAIMLERCHRYSLER CORP.

    With the ignition on.

    Measure the voltage of the Fused Engine Control Relay Output circuit at the EGR Solenoid harness connector.

    Is the voltage above 10 volts? 

    Yes 

    1. Go To  7).

    No 

    1. Repair the Engine Control Relay Output circuit for an open.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .
  7. 7) EGR SOLENOID CONTROL CIRCUIT SHORT TO GROUND 
    Fig 5: Checking EGR Solenoid Control Circuit
    GC0034243Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect PCM C2 harness connector.

    NOTE: Check connectors - Clean/repair as necessary.

    Measure the resistance between ground and the EGR solenoid control circuit.

    Is resistance above 100 kohms? 

    Yes 

    1. Go To  8).

    No 

    1. Repair the EGR solenoid control circuit for a short to ground.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .
  8. 8) EGR SOLENOID CONTROL CIRCUIT OPEN  
    Fig 6: Checking EGR Solenoid Control Circuit
    GC0034244Courtesy of DAIMLERCHRYSLER CORP.

    With the ignition off.

    Measure the resistance of the EGR Solenoid Control circuit from the EGR Solenoid harness connector to the PCM C2 harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  9).

    No 

    1. Repair the EGR Solenoid Control circuit for an open.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .
  9. 9) EGR SOLENOID CONTROL CIRCUIT SHORT TO VOLTAGE 
    Fig 7: Checking EGR Solenoid Control Circuit
    GC0034245Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition on.

    Measure the voltage of the EGR Solenoid Control circuit at the EGR Solenoid connector.

    Is the voltage below 1.0 volt? 

    Yes 

    1. Replace and program the Powertrain Control Module. (Refer to ELECTRICAL/ELECTRONIC CONTROL MODULES/POWERTRAIN CONTROL MODULE - REMOVAL) .
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .

    No 

    1. Repair the EGR Solenoid Control circuit short to voltage.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .
  10. 10) INTERMITTENT WIRING AND CONNECTORS 

    The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.

    NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal connections can set DTCs.
    NOTE: Check for any Technical Service Bulletins that may apply.

    Using the wiring diagram/schematic as a guide, inspect the wiring and connectors specific to this DTC. Wiggle the wires while checking for shorts and open circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform POWERTRAIN VERIFICATION TEST - VER 2 .

    No 

    1. The condition that caused this DTC to set is currently not present. Inspect the related wiring harness for a possible intermittent condition.
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