Diagnostic Test

TEST FOR INTERMITTENT CONDITION
1. Turn the ignition on.
2. Using a scan tool, record and erase Diagnostic Trouble Codes (DTCs).
3. Operate the Inverter Switch several times.
4. Cycle the ignition from on to off three times and leave on.
5. Using a scan tool, read DTCs.
  Does the scan tool display: B1E73-POWER INVERTER ENABLE OUTPUT SIGNAL CIRCUIT LOW?
  
  Yes
  - Go to step 2
  No
  - The conditions that caused this code to set are not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
CHECK FOR A SHORTED POWER INVERTER SWITCH

Fig 1: Checking For Shorted Power Inverter Switch
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the Inverter Switch connector.
  NOTE: Check connectors. Clean and repair as necessary.
3. Turn the ignition on.
4. Using a scan tool, select FCM, then select Data Display, and then read the Inverter Switch state.
  Does the switch state display Not Set?
  
  Yes
  - Replace the Inverter Switch in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 3
CHECK (P807) INVERTER SWITCH SIGNAL CIRCUIT FOR A SHORT TO GROUND

Fig 2: Checking Inverter Switch Signal Circuit
Courtesy of CHRYSLER LLC
1. Turn the ignition off.
2. Disconnect the FCM C2 connector.
  NOTE: Check connectors. Clean and repair as necessary.
3. Measure the resistance of the (P807) Inverter Switch Signal circuit between the Inverter Switch connector and ground.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (P807) Inverter Switch Signal circuit for a short to ground.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Go to step 4
CHECK (P807) INVERTER SWITCH SIGNAL CIRCUIT FOR A SHORT TO (Z600) GROUND CIRCUIT

Fig 3: Checking Inverter Switch Signal Circuit
Courtesy of CHRYSLER LLC
1. Measure the resistance between the (P807) Inverter Switch Signal circuit and the (Z600) Ground circuit at the Inverter Switch connector.
  Is the resistance below 10K Ohms?
  
  Yes
  - Repair the (P807) Inverter Switch Signal circuit for a short to the (Z600) Ground circuit.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .
  No
  - Replace the Front Control Module (FCM) in accordance with the Service Information.
  - Perform the BODY VERIFICATION TEST. See DTC-Based Diagnostics/MODULE, Front Control (FCM) - Standard Procedure .