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.
- E-MOTOR COOLING SYSTEM
- Visually Inspect e-Motor Cooling System.
Were there any Leakages, Defective Parts or Improper Connections Found?
Yes
Repair/Replace the damaged parts in accordance with the service procedure.
No
- Go To 2
- Visually Inspect e-Motor Cooling System.
- CHECK TEMPERATURE SENSOR
- Vehicle ignition off and without charging (at least 6 hours).
- Measure ambient temperature and record.
- Using Scan tool, measure e-Motor Stator Temperature.
Is the difference between e-Motor stator temperature and ambient temperature greater than 8 degrees Celsius?
Yes
- Go To 3
No
- Clear all fault codes, key OFF, wait 30 seconds, then key ON, but do not crank, wait 30 seconds.
- If fault of interest is still present, Go To 3. Otherwise, troubleshooting is complete.
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to STANDARD PROCEDURE .
- CHECK TEMPERATURE SENSOR WIRING HARNESS
- Disconnect temperature sensor wiring harness from PIM (28-way) and from e-Motor (6-way connector WITHOUT yellow clip).
- Check the harness for connector corrosion on both sides of the wiring harness. If temperature sensor wiring harness connectors have moderate to high corrosion, then replace wiring harness.
- Check continuity between motor side pin 5 to PIM side pin 23; motor side pin 6 to PIM side pin 22.
Were any problems found?
Yes
Repair wire Harness in accordance with the Service Procedure.
No
- Go To 4
- CHECK TEMPERATURE SENSOR SIGNAL PINS ON E-MOTOR
- E-machine temperature sensor - Sensor type: NTC-10K (inside of E-machine) - - - - NTC Resistance Temperature Curve: - - - - - Temp. [°C] Temp. [°F] R Nom [Ohm] R Min [Ohm] R Max [Ohm] - - - 60 140 2, 826 2, 743 2, 909 - - - 55 131 3, 335 3, 233 3, 437 - - - 50 122 3, 955 3, 829 4, 081 - - - 45 113 4, 712 4, 556 4, 868 - - - 40 104 5, 642 5, 447 5, 837 - - - 35 95 6, 791 6, 546 7, 035 - - - 30 86 8, 217 7, 910 8, 525 - - - 25 77 10, 000 9, 610 10, 389 - - - 20 68 12, 240 11, 745 12, 735 - - - 15 59 15, 074 14, 440 15, 708 - - - 10 50 18, 683 17, 865 19, 500 - - - 5 41 23, 310 22, 250 24, 370 - - - 0 32 29, 285 27, 901 30, 670 - - - -5 23 37, 060 35, 240 38, 881 - - - -10 14 47, 256 44, 844 49, 669 - - - -15 5 60, 737 57, 515 63, 959 - - - -20 -4 78, 713 74, 373 83, 052 - - - Measure the resistance between Pin 5, 6.
Is the resistance outside the value specified in the temperature/resistance reference table?
Yes
- Replace the e-Motor. Refer to MOTOR, ELECTRIC, REMOVAL .
- Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
No
- Replace the Power Inverter Module (PIM). Refer to MODULE, POWER INVERTER (PIM), REMOVAL .
- Perform the EVCU VERIFICATION TEST. Refer to STANDARD PROCEDURE .
- Measure the resistance between Pin 5, 6.