P04C4
DTC P04C3-P04C6
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P04C3 00
- Fuel Fill Door Lock Position Sensor Circuit
DTC P04C4 00
- Fuel Fill Door Lock Position Sensor Performance
DTC P04C5 00
- Fuel Fill Door Lock Position Sensor Circuit Low Voltage
DTC P04C6 00
- Fuel Fill Door Lock Position Sensor Circuit High Voltage
Diagnostic Fault Information
Circuit/System Description
The hybrid powertrain control module 2 provides a 5V signal through a pull-up resistor to the Fuel Door Lock Position Sensor Circuit. The other end of the Fuel Door Lock Position Sensor Circuit is connected to the Fuel Door Lock Position Sensor in the Fuel Door Status Switch Assembly. The hybrid powertrain control module 2 monitors the voltage on the Fuel Door Lock Position Sensor Circuit. In normal operation, when the Fuel Door Lock moves to the unlocked position, the switch in the Fuel Door Lock Position closes and lowers the voltage on the Fuel Door Lock Position Sensor Circuit.
The hybrid powertrain control module 2 monitors the Fuel Door Lock Position Sensor Circuit for invalid and out of range voltages and for unexpected lock and unlock statuses
Conditions for Running the DTC
The hybrid powertrain control module 2 is awake.
Conditions for Setting the DTC
P04C3 00
The hybrid powertrain control module 2 detects the fuel door position sensor signal circuit voltage is mid range between expected high and low voltage values.
P04C4 00
The hybrid powertrain control module 2 detects an unlock condition when there was not a corresponding unlock command.
P04C5 00
The hybrid powertrain control module 2 detects a short to ground in the fuel door lock sensor signal circuit.
P04C6 00
The hybrid powertrain control module 2 detects a short to voltage or an open/high resistance in the fuel door lock sensor signal circuit.
Action Taken When the DTC Sets
The fuel door lock actuator may malfunction.
Conditions for Clearing the DTC
DTC P04C3 00, P04C4 00, P04C5 00 and P04C6 00 are type B DTCs
Reference Information
Schematic Reference
Release Systems Schematics Release Systems Schematics
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Description and Operation
Fuel Fill Door Description and Operation Fuel Fill Door
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
1. Vehicle in Service Mode.
2. Verify the scan tool Fuel Door Lock parameter changes between Locked and Unlocked when commanding the Fuel Fill Door Lock to LOCK and UNLOCK with a scan tool.
• If the parameter does not change
Refer to Circuit/System Testing.
• If the parameter changes
3. All OK.
Circuit/System Testing
1. Vehicle OFF, disconnect the harness connector at the B208 fuel door status switch assembly. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the ground circuit terminal 4 and ground.
• If 10 ohms or greater
1. Vehicle OFF.
2. Test for less than 2 ohms in the ground circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, repair the open/high resistance in the ground connection.
• If less than 10 ohms
3. Vehicle in Service Mode, test for 4.8-5.2 V between the 5 V reference circuit terminal 3 and ground.
• If less than 4.8 V
1. Vehicle OFF, disconnect the harness connector at the K114B hybrid powertrain control module 2.
2. Test for infinite resistance between the 5 V reference circuit and ground
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance
3. Test for less than 2 ohms in the 5 V reference circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K114B hybrid powertrain control module 2.
• If greater than 5.2 V
1. Vehicle OFF, disconnect the harness connector at the K114B hybrid powertrain control module 2, Vehicle in Service Mode.
2. Test for less than 1 V between the 5 V reference circuit and ground.
• If 1 V or greater, repair the short to voltage on the circuit.
• If less than 1 V, replace the K114B hybrid powertrain control module 2.
• If between 4.8-5.2 V
4. Test or replace the B208 fuel door status switch assembly.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Programming and Relearning for the hybrid powertrain control module 2 replacement, programming and setup