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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1573 (6.7L Diesel - DTCS P065A To P209F - 2500 Hd) >> DTC Troubleshooting >> P0691-Cooling Fan 1 Control Circuit Low >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2017 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
  1. ACTIVE DTC 
    1. Turn the ignition on.
    2. Using the scan tool, erase DTCs.
    3. Turn the ignition off for 75 seconds.
    4. Turn the ignition on.
    5. Using the scan tool, actuate the Radiator Clutch Fan control on.
    6. Using the scan tool, read DTCs.

      Did the DTC reset?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K161) CLUTCH FAN SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    1. Stop actuation of the Radiator Clutch Fan.
    2. Disconnect the Radiator Clutch Fan harness connector.
    3. Disconnect the PCM C1 harness connector.
    4. Measure the resistance between ground and the (K161) Clutch Fan Supply circuit at the Radiator Clutch Fan harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the (K161) Clutch Fan Supply circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK FOR THE (K161) CLUTCH FAN SUPPLY CIRCUIT SHORTED TO THE (K934) SENSOR GROUND CIRCUIT 
    1. Measure the resistance between the (K161) Clutch Fan Supply circuit and the (K934) Sensor Ground circuit at the Radiator Clutch Fan harness connector.

      Is the resistance below 10k Ohms?

      Yes 

      • Repair the short between the (K161) Clutch Fan Supply circuit and the (K934) Sensor Ground circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  4
  4. CHECK THE RADIATOR CLUTCH FAN 
    1. Measure the resistance between ground and the (K161) Clutch Fan Supply circuit at the Radiator Clutch Fan.

      Is the resistance below 10k Ohms?

      Yes 

      • Replace the Powertrain Control Module (PCM) in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Replace the Radiator Clutch Fan in accordance with the Service Information.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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