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Diagnostic Test

WARNING: This page is about a different car, the 2013 Dodge Avenger and 2013 Chrysler 200. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Diagnose and repair any Cooling Fan Relay control circuit DTCs before proceeding with this test.

  1. COOLING FAN OPERATION (LOW SPEED) 
    1. With a scan tool, actuate the cooling fans in low speed operation.
      NOTE:

      During low speed actuation the Cooling Fan Motors are barely audible.

      Are the Cooling Fan Motors operating?

      Yes 

      • Go To Step  2

      No 

      • Go To Step  3
  2. COOLING FAN OPERATION (HIGH SPEED) 
    1. With a scan tool, actuate the cooling fans in high speed operation.
      NOTE:

      During high speed actuation the Cooling Fan Motors are easily audible.

      Are both Cooling Fan Motors operating?

      Yes 

      • The Cooling Fan Motors are operating properly.

      No, Cooling Fan Motor 1 is inoperative 

      • Go To Step  8

      No, Cooling Fan Motor 2 is inoperative 

      • Go To Step  11
  3. CHECK THE (A16) COOLING FAN 12 VOLT SUPPLY CIRCUIT 
    1. Turn the ignition on.
    2. Remove the Hi-Med. Fan Relay.
    3. Using a 12-Volt test light connected to ground, probe the (A16) Cooling Fan 12 Volt Supply circuit at the Relay connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To Step  4

      No 

      • Repair the (A16) Cooling Fan 12 Volt Supply circuit for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  4. CHECK THE (N23) COOLING FAN MOTOR 1 OUTPUT VOLTAGE 
    1. Disconnect the Cooling Fan Motor 1 harness connector.
    2. Using a Voltmeter connected to ground, probe the (N23) Cooling Fan Motor 1 Output circuit at the Cooling Fan Motor 1 harness connector.
      NOTE:

      The voltage reading should be approximately Battery voltage.

      Is the voltage reading equal to Battery voltage?

      Yes 

      • Go To Step  5

      No 

      • Repair the (N23) Cooling Fan Motor 1 Output circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  5. CHECK THE COOLING FAN MOTOR 2 OUTPUT VOLTAGE 
    1. Reconnect the Cooling Fan Motor 1 harness connector.
    2. Disconnect the Cooling Fan Motor 2 harness connector.
      NOTE:

      Cooling Fan Motor 1 must be connected before checking for voltage at the (N24) circuit.

    3. Measure the voltage of the (N24) Cooling Fan Motor 2 Output circuit at the Cooling Fan Motor 2 harness connector.
      NOTE:

      The voltage reading should be approximately Battery voltage.

      Is the voltage reading equal to Battery voltage?

      Yes 

      • Go To Step  6

      No 

      • Go To Step  7
  6. CHECK THE (Z901) GROUND CIRCUIT 
    1. Using a 12-Volt test light connected to 12 Volts, probe the (Z901) Ground circuit at the Cooling Fan Motor 2 harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Replace the Cooling Fan Motor 2 in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Repair the (Z901) Ground circuit for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  7. CHECK THE COOLING FAN MOTOR 2 SUPPLY 
    1. Turn the ignition off.
    2. Disconnect the Cooling Fan Motor 1 harness connector.
    3. Measure the resistance from the (N210) Cooling Fan Lo-Hi Control circuit at the Cooling Fan Motor 1 harness connector and the (N24) Cooling Fan Motor 2 Output circuit at the Cooling Fan Motor 2 harness connector.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Replace the Cooling Fan Motor 1 in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Repair the open or high resistance in the circuit or circuits. Try switching the Hi-Lo Fan Relay with a known good relay and rechecking the circuit before checking the (N210) and (N24) circuits for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  8. CHECK THE (A16) COOLING FAN 12 VOLT SUPPLY CIRCUIT 
    1. Turn the ignition on.
    2. Remove the Hi-Med. Fan Relay.
    3. Using a 12-Volt test light connected to ground, probe the (A16) Cooling Fan 12 Volt Supply circuit at the Relay connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To Step  9

      No 

      • Repair the (A16) Cooling Fan 12 Volt Supply circuit for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  9. CHECK THE (N23) COOLING FAN MOTOR 1 OUTPUT VOLTAGE 
    1. Connect a jumper between the (A16) Cooling Fan 12 Volt Supply circuit and the (N23) Cooling Fan Motor 1 Output circuit at the Hi-Med. Fan Relay.
    2. Disconnect the Cooling Fan Motor 1 harness connector.
    3. Using a Voltmeter connected to ground, probe the (N23) Cooling Fan Motor 1 Output circuit at the Cooling Fan Motor 1 harness connector.
      NOTE:

      The voltage reading should be approximately Battery voltage.

      Is the voltage reading equal to Battery voltage?

      Yes 

      • Go To Step  10

      No 

      • Repair the (N23) Cooling Fan Motor 1 Output circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  10. CHECK THE GROUND CIRCUIT 
    1. With a scan tool, actuate the cooling fans in high speed operation.
    2. Using a 12-Volt test light connected to 12 Volts, probe the (N210) Cooling Fan Lo-Hi Control circuit at the Cooling Fan Motor 1 harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Replace the Cooling Fan Motor 1 in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Repair the open or high resistance in the circuit or circuits. Try switching the Hi-Lo Fan Relay with a known good relay and rechecking the circuit before checking the (N210) and (Z901) circuits for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  11. CHECK THE (A16) COOLING FAN 12 VOLT SUPPLY CIRCUIT 
    1. Turn the ignition on.
    2. Remove the Series-Parallel Fan Relay.
    3. Using a 12-Volt test light connected to ground, probe the (A16) Cooling Fan 12 Volt Supply circuit at the Relay connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Go To Step  12

      No 

      • Repair the (A16) Cooling Fan 12 Volt Supply circuit for an open.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  12. CHECK THE (N24) COOLING FAN MOTOR 2 OUTPUT VOLTAGE 
    1. Connect a jumper between the (A16) Cooling Fan 12 Volt Supply circuit and the (N24) Cooling Fan Motor 2 Output circuit at the Series-Parallel Fan Relay.
    2. Disconnect the Cooling Fan Motor 2 harness connector.
    3. Using a Voltmeter connected to ground, probe the (N24) Cooling Fan Motor 2 Output circuit at the Cooling Fan Motor 2 harness connector.
      NOTE:

      The voltage reading should be approximately Battery voltage.

      Is the voltage reading equal to Battery voltage?

      Yes 

      • Go To Step  13

      No 

      • Repair the (N24) Cooling Fan Motor 2 Output circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
  13. CHECK THE (Z901) GROUND CIRCUIT 
    1. Using a 12-Volt test light connected to 12 Volts, probe the (Z901) Ground circuit at the Cooling Fan Motor 2 harness connector.
      NOTE:

      The test light should be illuminated and bright. Compare the brightness to that of a direct connection to the battery.

      Is the test light illuminated and bright?

      Yes 

      • Replace the Cooling Fan Motor 2 in accordance with the service information.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .

      No 

      • Repair the (Z901) Ground circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to the appropriate Testing & Diagnostics article in Engine Performance .
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