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 FOR VOLTAGE BETWEEN THE (H300) POSITIVE AND (H301) NEGATIVE HIGH VOLTAGE CIRCUITS AT THE HIGH VOLTAGE BATTERY PACK
1. Turn the ignition off.
2. Perform the High Voltage Power Down procedure. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
3. Unlock and disconnect the C1 high-voltage harness connector from the High Voltage Battery Pack. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
4. Unlock and disconnect the C2 high-voltage harness connector from the High Voltage Battery Pack. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
5. Measure the voltage between the (H300) High Voltage Battery positive circuit connector terminal (A), and the (H301) High Voltage Battery negative circuit connector terminal (B) at the C1 high-voltage connector socket on the High Voltage Battery Pack.
  Is there any voltage present?
  
  Yes
  - There should not be voltage present at the high-voltage connector when powered down. 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
  - Go To 2
CHECK (H300) POSITIVE AND (H301) NEGATIVE HIGH VOLTAGE CIRCUITS FOR AN OPEN/HIGH RESISTANCE WITHIN THE HIGH VOLTAGE BATTERY PACK
1. Measure the resistance of the (H301) High Voltage Battery positive circuit between connector terminal (B) at the C1 high-voltage connector socket and connector terminal (A) at the C2 high-voltage connector socket on the High Voltage Battery Pack.
2. Measure the resistance of the (H300) High Voltage Battery negative circuit between connector terminal (A) at the C1 high-voltage connector socket and connector terminal (B) at the C2 high-voltage connector socket on the High Voltage Battery Pack.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3
  No
  - The internal Battery Pack Charger Fuse is open. 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 .
ACTIVE DTC
1. Connect and lock the C1 high-voltage harness connector to the High Voltage Battery Pack. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
2. Connect and lock the C2 high-voltage harness connector to the High Voltage Battery Pack. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
3. Perform the High Voltage Power Up procedure. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .
4. Turn the ignition on.
5. With the scan tool, record and erase BPCM DTCs.
6. Turn the ignition off. Wait one minute.
7. Turn the ignition on. Wait one minute.
8. With the scan tool, read DTCs.
  Is the status Active for this DTC?
  
  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
  - 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 .