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Diagnostic Test

  1. RADIATOR FAN HIGH RELAY 
    1. Turn the ignition on.
    2. With the scan tool, actuate the High Speed Rad Fan Control State.

      Does The Large Cooling Fan Operate?

      Yes 

      • Go to step  2

      No 

      • Go to step  13
  2. RADIATOR FAN CONTROL RELAY 
    NOTE: Diagnose and repair any Coolant Fan circuit or Temperature Sensor circuit DTCs before proceeding with this test.
    1. With the scan tool, actuate the Low Speed Rad Fan Control State.

      Do both Cooling Fans Operate?

      Yes 

      • Test complete.

      No 

      • Go to step  3
  3. (N24) RAD FAN CONTROL RELAY OUTPUT CIRCUIT 
    Fig 1: Checking Radiator Fan Control Relay Output Circuit
    GC0098262Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Cooling Fan harness connector.
    3. Turn the ignition on.
    4. Using a 12-volt test light connected to ground, check the (N24) Rad Fan Control Relay Output circuit in the Cooling Fan harness connector.
    5. With the scan tool, actuate the Low Speed Rad Fan Control State.
      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  7

      No 

      • Go to step  4
  4. RADIATOR FAN CONTROL RELAY 
    Fig 2: Checking Radiator Fan Control Relay Output Circuit
    GC0098262Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Verify the Radiator Fan Control Relay is installed properly and the terminals are making a tight fit.
    3. Remove the Radiator Fan Control Relay and substitute it with a known good Relay.
    4. Turn the ignition on.
    5. Using a 12-volt test light connected to ground, check the (N24) Rad Fan Control Relay Output circuit in the Cooling Fan harness connector.
    6. With the scan tool, actuate the Low Speed Rad Fan Control State.
      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 Radiator Fan Control Relay.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  5
  5. (N24) RAD FAN CONTROL RELAY OUTPUT CIRCUIT SHORTED TO GROUND 
    Fig 3: Checking Radiator Fan Control Relay Output Circuit For Short To Ground
    GC0098263Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C1 TIPM harness connector.
    3. Measure the resistance between ground and the (N24) Rad Fan Control Relay Output circuit in the Cooling Fan harness connector.

      Is the resistance below 100k Ohms?

      Yes 

      • Repair the (N24) Rad Fan Control Relay Output circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  6
  6. (N24) RAD FAN CONTROL RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 4: Checking Radiator Fan Control Relay Output Circuit For Open Or High Resistance
    GC0098264Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (N24) Rad Fan Control Relay Output circuit between the Cooling Fan harness connector and the C1 TIPM harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (N24) Rad Fan Control Relay Output circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  18
  7. (N210) RAD FAN HIGH/LOW CONTROL FEED 
    Fig 5: Checking Radiator Fan High/Low Control Feed
    GC0098265Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Connect the Cooling Fan harness connector.
    3. Remove the Radiator Fan High/Low Control Relay.
    4. Turn the ignition on.
    5. Using a 12-volt test light connected to ground, check the (N210) Rad Fan High/Low Control Feed circuit in the Radiator Fan High/Low Control Relay harness connector.
    6. With the scan tool, actuate the Low Speed Rad Fan Control State.
      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 

      • Go to step  8
  8. COOLING FAN 
    1. Turn the ignition off.
    2. Disconnect the Cooling Fan harness connector.
    3. Connect a jumper wire between cavity 1 of the Cooling Fan harness connector.
    4. Turn the ignition on.
    5. Using a 12-volt test light connected to ground, check the (N210) Rad Fan High/Low Control Feed circuit in the Cooling Fan harness connector on the Cooling Fan side of the harness connector.
    6. With the scan tool, actuate the Low Speed Rad Fan Control State.
      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 

      No 

      • Go to step  11
  9. RADIATOR FAN HIGH/LOW CONTROL RELAY 
    1. Turn the ignition off.
    2. Verify the Radiator Fan High/Low Control Relay is installed properly and the terminals are making a tight fit.
    3. Remove the Radiator Fan High Low Control Relay and substitute it with a known good Relay.
    4. Turn the ignition on.
    5. With the scan tool, actuate the Low Speed Rad Fan Control State.

      Do Both Cooling Fans Operate?

      Yes 

      • Replace the Radiator Fan High/Low Control Relay.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  10
  10. RADIATOR FAN HIGH RELAY 
    1. Turn the ignition off.
    2. Verify the Radiator Fan High Relay is installed properly and the terminals are making a tight fit.
    3. Remove the Radiator Fan High Relay and substitute it with a known good Relay.
    4. Turn the ignition on.
    5. With the scan tool, actuate the Low Speed Rad Fan Control State.

      Do Both Cooling Fans Operate?

      Yes 

      • Replace the Radiator Fan High Relay.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  18
  11. (N210) RAD FAN HIGH/LOW CONTROL FEED SHORTED TO GROUND 
    Fig 6: Checking Radiator Fan High/Low Control Feed For Short To Ground
    GC0098266Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C1 TIPM harness connector.
    3. Measure the resistance between ground and the (N210) Rad Fan High/Low Relay Feed circuit in the Cooling Fan harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the (N210) Rad Fan High/Low Control Feed circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  12
  12. (N210) RAD FAN HIGH/LOW CONTROL FEED OPEN OR HIGH RESISTANCE 
    Fig 7: Checking Radiator Fan High/Low Control Feed For Open Or High Resistance
    GC0098267Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (N210) Rad Fan High/Low Control Feed circuit between the Cooling Fan harness connector and the C1 TIPM harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (N210) Rad Fan High/Low Control Feed circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  18
  13. (Z904) GROUND CIRCUIT OPEN 
    Fig 8: Checking Radiator Fan Ground Circuit For Open
    GC0098268Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the Cooling Fan harness connector.
    3. Using a 12-volt test light connected to voltage, check the (Z904) Ground circuit in the Cooling Fan 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 

      • Go to step  14

      No 

      • Repair the (Z904) Ground circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  14. (N23) RAD FAN HIGH RELAY OUTPUT CIRCUIT 
    Fig 9: Checking Radiator Fan High Relay
    GC0098269Courtesy of CHRYSLER LLC
    1. Turn the ignition on.
    2. Using a 12-volt test light connected to ground, check the (N23) Rad Fan High Relay Output circuit in the Cooling Fan harness connector.
    3. With the scan tool, actuate the High Speed Rad Fan Control State.
      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 

      No 

      • Go to step  15
  15. RADIATOR FAN HIGH RELAY 
    Fig 10: Checking Radiator Fan High Relay
    GC0098269Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Verify the Radiator Fan High Relay is installed properly and the terminals are making a tight fit.
    3. Remove the Radiator Fan High Relay and substitute it with a known good Relay.
    4. Using a 12-volt test light connected to ground, check the (N23) Rad Fan High Relay Output circuit in the Cooling Fan harness connector.
    5. With the scan tool, actuate the High Speed Rad Fan Control State.
      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 Radiator Fan High Relay.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  16
  16. (N23) RAD FAN HIGH RELAY OUTPUT CIRCUIT SHORTED TO GROUND 
    Fig 11: Checking Radiator Fan High Relay Output Circuit For Short To Ground
    GC0098270Courtesy of CHRYSLER LLC
    1. Turn the ignition off.
    2. Disconnect the C4 TIPM harness connector.
    3. Measure the resistance between ground and the (N24) Rad Fan High Relay Output circuit in the Cooling Fan harness connector.

      Is the resistance below 100 Ohms?

      Yes 

      • Repair the (N23) Rad Fan High Relay Output circuit for a short to ground.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  17
  17. (N23) RAD FAN HIGH RELAY OUTPUT CIRCUIT OPEN OR HIGH RESISTANCE 
    Fig 12: Checking Radiator Fan High Relay Output Circuit For Open Or High Resistance
    GC0098271Courtesy of CHRYSLER LLC
    1. Measure the resistance of the (N23) Rad Fan High Relay Output circuit between the Cooling Fan harness connector and the C4 TIPM harness connector.

      Is the resistance above 5.0 Ohms?

      Yes 

      • Repair the (N23) Rad Fan High Relay Output circuit for an open or high resistance.
      • Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .

      No 

      • Go to step  18
  18. TOTALLY INTEGRATED POWER MODULE (TIPM) 
    NOTE: Before continuing, check the TIPM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
    1. 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 

      No 

      • Replace the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
      • Perform the BODY VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
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