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.

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record and erase BPCM DTCs.
3. Turn the ignition off. Wait one minute.
4. Turn the ignition on. Wait one minute.
5. With the scan tool, actuate the Battery Coolant Pump Duty Cycle in the Electronic Vehicle Control Unit (EVCU) Actuators screen.
6. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - The condition or conditions that originally set this DTC are not present at this time. Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
CHECK THE VOLTAGE OF THE (D515) LIN BUS CIRCUIT
1. Turn the ignition off.
2. Disconnect the Battery Coolant Pump harness connector.
3. Turn the ignition on.
4. Measure the voltage between ground and the (D515) LIN BUS circuit at the Battery Coolant Pump harness connector.
  Is the voltage above 5.0 volts?
  
  Yes
  - Replace the Battery Coolant Pump in accordance with the Service Information. Refer to PUMP, BATTERY COOLANT, REMOVAL .
  - Perform the BATTERY PACK CONTROL MODULE (BPCM) VERIFICATION TEST. Refer to BPCM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE (D515) LIN BUS CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Disconnect the High Voltage Battery Pack C3 low voltage harness connector.
3. Measure the resistance of the (D515) LIN BUS circuit between the Battery Coolant Pump harness connector and the High Voltage Battery Pack C3 low voltage harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Replace the High Voltage Battery Pack in accordance with the Service Information. Refer to BATTERY, HIGH-VOLTAGE, REMOVAL .
  - Perform the BATTERY PACK CONTROL MODULE (BPCM) VERIFICATION TEST. Refer to BPCM VERIFICATION TEST .
  No
  - Repair the open in the (D515) LIN Bus circuit between the Battery Coolant Pump harness connector and the High Voltage Battery Pack C3 low voltage harness connector.
  - Perform the BATTERY PACK CONTROL MODULE (BPCM) VERIFICATION TEST. Refer to BPCM VERIFICATION TEST .