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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.6L Engine - DTCS P0646 To P127C >> Diagnosis And Testing >> P0694-High Speed Fan Relay Control Circuit High >> Diagnostic Test

Diagnostic Test

  1. 1)  RADIATOR COOLING FAN MODULE OPERATION 

    Ignition on, engine not running.

    With a scan tool, actuate the High Speed Cooling Fan.

    Is the Cooling Fan operating (high speed)? 

    Yes 

    1. Refer to the INTERMITTENT CONDITION diagnostic procedure.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  2).
  2. 2)  (A16) FUSED B+ CIRCUIT 
    Fig 1: Checking Fused B+ Circuit
    GC0041674Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition off.

    Disconnect the Radiator Cooling Fan Module harness connector.

    Using a 12-volt test light connected to ground, probe the (A16) Fused B+ circuit in the Radiator Cooling Fan Module harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  3).

    No 

    1. Repair the (A16) Fused B+ circuit. Inspect the related fuse and repair as necessary.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  3. 3)  (Z903) GROUND CIRCUIT 
    Fig 2: Checking Ground Circuit
    GC0041675Courtesy of DAIMLERCHRYSLER CORP.

    Using a 12-volt test light connected to battery voltage, probe the (Z903) Ground circuit in the Radiator Cooling Fan Module harness connector.

    Does the test light illuminate brightly? 

    Yes 

    1. Go To  4).

    No 

    1. Repair the (Z903) Ground circuits.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
  4. 4)  HIGH SPEED RAD FAN CONTROL CIRCUIT 
    Fig 3: CHECKING HIGH SPEED RAD FAN CONTROL CIRCUIT
    GC0041959Courtesy of DAIMLERCHRYSLER CORP.

    Turn the ignition on, engine not running.

    With a scan tool, actuate the High Speed Cooling Fan.

    Using a 12-volt test light connected to battery voltage, probe the (N112) High Speed Rad Fan Control circuit in the Radiator Cooling Fan Module harness connector.

    Does the test light illuminate brightly and flash on and off? 

    Yes 

    1. Replace the Radiator Cooling Fan Module.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Go To  5).
  5. 5)  (N112) HIGH SPEED RAD FAN CONTROL CIRCUIT SHORTED TO BATTERY VOLTAGE 
    Fig 4: CHECKING HIGH SPEED RAD FAN CONTROL CIRCUIT
    GC0041962Courtesy of DAIMLERCHRYSLER CORP.

    Turn ignition off.

    Disconnect the PCM harness connector.

    Turn ignition on, engine not running.

    Using a voltmeter, measure the voltage of the (N112) High Speed Rad Fan Control circuit in the Radiator Cooling Fan Module harness connector.

    Is there voltage present? 

    Yes 

    1. Repair the short to voltage in the (N112) High Speed Rad Fan Control circuit
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .

    No 

    1. Replace the Powertrain Control Module in accordance with the Service Information.
    2. Perform the POWERTRAIN VERIFICATION TEST. (Refer to STANDARD PROCEDURE - POWERTRAIN VERIFICATION TEST) .
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