Diagnostic Test

WARNING: This page is about a different car, the 2015 Fiat 500. However, it is still accessible from the selected car via links, so may be relevant.

CHECK E-MOTOR COOLING SYSTEM
1. 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 information.
  
  No
  - Go To 2
CHECK TEMPERATURE SENSOR
1. Vehicle ignition off and without charging (at least 6 hours).
2. Measure ambient temperature and record.
3. 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 3Otherwise, troubleshooting is complete.
CHECK TEMPERATURE SENSOR WIRING HARNESS
1. Disconnect Temperature Sensor wiring harness from PIM and from e-Motor.
2. 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.
3. Check continuity between motor side pin 5 to PIM side pin 23; motor side pin 6 to PIM side pin 22.
  Was there continuity?
  
  Yes
  - Go To 4
  No
  
  Replace Wire Harness in accordance with the service information.

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 EVCU VERIFICATION TEST .
No
- Replace the Power Inverter Module (PIM). Refer to MODULE, POWER INVERTER (PIM), REMOVAL .
- Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .