LEMON Manuals: Even more car manuals for everyone
Home >> Chrysler >> 2005 >> 300 Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Diagnostic Code Index, DTCS P0016 To P0121, Troubleshooting Procedure & Intermittent Condition >> Diagnosis And Testing >> P0118-Engine Coolant Temperature Sensor Circuit High >> Diagnostic Test

Diagnostic Test

  1. 1)  ECT SENSOR VOLTAGE ABOVE 4.98 VOLTS 
    Fig 1: SCAN TOOL (STARSCAN)
    GC0013164Courtesy of DAIMLERCHRYSLER CORP.

    Ignition on, engine not running.

    With a scan tool, read the ECT voltage.

    Is the voltage above 4.98 volts? 

    Yes 

    1. Go To step  2).

    No 

    1. Refer to INTERMITTENT CONDITION .
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .
  2. 2)  ECT SENSOR 
    Fig 2: Checking Engine Coolant Temperature Sensor Signal Circuit & Ground Circuit
    GC0014781Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the ECT harness connector.

    Connect a jumper wire between the (K2) ECT Signal circuit and the (K900) Sensor ground circuit in the ECT harness connector.

    Ignition on, engine not running.

    With a scan tool, read ECT voltage.

    Is the voltage below 1.0 volt with the jumper wire installed? 

    Yes 

    1. Replace the ECT Sensor.
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .

    No 

    1. Go To step  3).
      NOTE: Remove the jumper wire before continuing.
  3. 3)  (K2) ECT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 3: Checking Engine Coolant Temperature Sensor Signal Circuit
    GC0014780Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the PCM harness connectors.

    Ignition on, engine not running.

    Measure the voltage on the (K2) ECT Signal circuit in the ECT Sensor harness connector.

    Is voltage present? 

    Yes 

    1. Repair the short to battery voltage in the (K2) ECT Signal circuit.
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .

    No 

    1. Go To step  4).
  4. 4)  (K2) ECT SIGNAL CIRCUIT OPEN 
    Fig 4: Checking Engine Coolant Temperature Sensor Signal Circuit
    GC0014782Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    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 Miller Special Tool #8815 to perform diagnosis.

    Measure the resistance of the (K2) ECT Signal circuit from the ECT Sensor harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To step  5).

    No 

    1. Repair the open in the (K2) ECT Signal circuit.
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .
  5. 5)  (K900) SENSOR GROUND CIRCUIT OPEN  
    Fig 5: Checking Engine Coolant Temperature Sensor Ground Circuit
    GC0014783Courtesy of DAIMLERCHRYSLER CORP.

    Measure the resistance of the (K900) Sensor ground circuit from the ECT Sensor harness connector to the appropriate terminal of special tool #8815.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To step  6).

    No 

    1. Repair the open in the (K900) Sensor ground circuit.
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .
  6. 6)  PCM  
    NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

    Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and Ground circuits.

    Were there any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .

    No 

    1. Replace and program the Powertrain Control Module. Refer to MODULE-POWERTRAIN CONTROL .
    2. Perform NGC POWERTRAIN VERIFICATION TEST VER - 5 .
scientia non olet · About LEMON Manuals