Diagnostic Test

WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.

CHECK IF DTC IS CURRENT
1. Turn the ignition on.
2. With the scan tool, read Electric Vehicle Control Unit (EVCU) DTCs.
3. Record any DTCs and Environmental Data.
4. With the scan tool, erase EVCU DTCs.
5. Using the recorded Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
6. With the scan tool, read EVCU DTCs.
  Does this DTC reset?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
CHECK THE (F940) RADIATOR FAN MODULE POWER CIRCUIT FOR OPEN/HIGH RESISTANCE
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F940) Radiator Fan Module power circuit at the Fan Module harness connector.
  NOTE:
  The test light must illuminate brightly. Compare the brightness to that of a direct connection to the battery.
  
  Does the test light illuminate brightly?
  
  Yes
  - Go To 3
  No
  - Repair the open/high resistance in the (F940) Radiator Fan Module power circuit.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (Z823) RADIATOR FAN MODULE GROUND CIRCUIT FOR OPEN/HIGH RESISTANCE
1. Turn the ignition on.
2. Using a 12-volt test light connected to 12-volts, check the (Z823) Radiator Fan Module ground circuit at the Fan Module.
  Does the test light illuminate brightly?
  
  Yes
  - Go To 4
  No
  - Repair the open/high resistance in the (Z823) Radiator Fan Module ground circuit.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (N27) RADIATOR FAN PWM CONTROL CIRCUIT FOR A SHORT TO GROUND
1. Turn the ignition off.
2. Remove the key from the Ignition Switch, close doors and allow the EVCU to shut down. Allow up to 2 minutes for this to occur. Opening the vehicle door will interrupt the shut down process.
3. Disconnect the EVCU C1 harness connector.
4. Measure the resistance of the (N27) Radiator Fan PWM Control circuit between ground and the EVCU C1 harness connector.
  Is the resistance above 100k Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the (N27) Radiator Fan PWM Control circuit for a short to ground.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK THE (N27) RADIATOR FAN PWM CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
1. Turn the ignition on.
2. Measure the voltage between ground and the (N27) Radiator Fan PWM Control circuit in the EVCU C1 harness connector.
  Is the voltage above 0.5 volts?
  
  Yes
  - Repair the (N27) Radiator Fan PWM Control circuit for a short to voltage.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Replace the Radiator Fan Module in accordance with the Service Information.
  - Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .