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.

PERFORM VISUAL INSPECTION OF 3-PHASE WIRING HARNESS BETWEEN E-MOTOR AND PIM
NOTE:
Any time the Power Inverter Module (PIM) cover is removed, it MUST BE REPLACED due to a non reusable seal.
1. Disconnect 3 Phase harness from PIM and e-Motor, and inspect for corrosion.
  Was there any corrosion at connections?
  
  Yes
  
  Replace 3 Phase Wire Harness according to written service procedure.
  
  No
  - Go To 2
CHECK PIM DIODE
1. Disconnect 12V Battery.
2. Disconnect the 28 way Low Voltage connector from PIM.
  NOTE:
  Any time the Power Inverter Module (PIM) cover is removed, it MUST BE REPLACED due to a non reusable seal.
3. Disconnect all High Voltage wires from PIM.
4. Measure Diode with multimeter.
5. Measure T-Plus (3 Measurements) : U/V/W and record.
6. Measure T-Minus (3 Measurements) : U/V/W and record.
  Were the readings between 0.2V and 0.4V ?
  
  yes
  - Go To 3
  No
  - Replace the Power Inverter Module (PIM). Refer to MODULE, POWER INVERTER (PIM), REMOVAL .
  - Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .
CHECK E-MOTOR
1. Perform isolation measurements of PIM.
  Refer to ISOLATION MEASUREMENTS OF PIM .
2. Perform isolation measurements of e-Motor.
  Refer to ISOLATION MEASUREMENTS OF E-MOTOR .
3. Perform isolation measurement of 3 phase wiring harness.
  Refer to ISOLATION MEASUREMENT OF 3 PHASE WIRING HARNESS .
4. Check electrical resistance of e-Motor phases.
  Refer to CHECK ELECTRICAL RESISTANCE BETWEEN E-MOTOR PHASES .
  
  Did any of the above tests fail?
  
  Yes
  - Repair in accordance with the service information.
  - Perform the EVCU VERIFICATION TEST. Refer to EVCU VERIFICATION TEST .
  No
  - The condition that caused the DTC to set is not present at this time.
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .