P169D
DTC P169D
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 Descriptor
DTC P169D 00
- Fuel Fill Door Open Request Switch Wake-Up Circuit Performance
Diagnostic Fault Information
Circuit/System Description
The hybrid powertrain control module 2 monitors the voltage values of the fuel fill door open request wake-up signal circuit and the fuel door request signal circuit. When the refuel request switch is pressed, the two switch contacts close. This provides B+ to the Wake-up Circuit input of the hybrid powertrain control module 2 and lowers the voltage on the fuel door request signal circuit input to the hybrid powertrain control module 2.
The hybrid powertrain control module 2 detects the voltage on the signal circuits and commands the fuel system to vent and sends a serial data message to the driver information center to display the Wait to Refuel message. The hybrid powertrain control module 2 then energizes the fuel door lock/unlock actuator to unlock the fuel door
Conditions for Running the DTC
* The hybrid powertrain control module 2 is awake
* A refuel request has been commanded
Conditions for Setting the DTC
The hybrid powertrain control module 2 detects that the Fuel Fill Door Open Request Switch Wake-Up Circuit value does not match the expected corresponding value for the Fuel Fill Door Open Request resistor ladder switch input.
Action Taken When the DTC Sets
* The fuel filler door unlatch request will only function when the hybrid powertrain control module 2 is awake.
* The driver information center will display the Service Refueling System message.
Conditions for Clearing the DTC
DTC P169D 00 is a type B DTC
Reference Information
Schematic Reference
Release Systems Schematics (Release) Release Systems Schematics (Release)Release Systems Schematics (Liftgate) Release Systems Schematics (Liftgate)
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
Vehicle in Service Mode, command the fuel filler door to UNLATCH by pressing the S117 refuel request switch. The M97 fuel door lock actuator should unlatch allowing the fuel filler door to open
Circuit/System Testing
1. Vehicle OFF, disconnect the harness connector at the S117 refuel request switch.
2. Verify that a test lamp illuminates between the B+ circuit terminal 1 and ground.
• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
3. Connect the harness connector at the S117 refuel request switch.
4. Disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.
5. Connect a test lamp between the signal circuit terminal 7 and ground.
6. Observe the function of the test lamp while pressing and releasing the S117 refuel request switch. The test lamp should turn ON each time the switch is pressed.
• If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the S117 refuel request switch.
• If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the S117 refuel request switch.
7. If all circuits test normal, replace the K114B hybrid powertrain control module 2.
Component Testing
1. Vehicle OFF, disconnect the harness connector at the S117 refuel request switch.
2. Test for infinite resistance between the signal terminal 1 and the B+ terminal 2 with the switch in the open position.
• If not the specified value, replace the S117 refuel request switch.
3. Test for less than 2 ohm between the signal terminal 1 and the B+ terminal 2 with the switch in the closed position.
• If greater than the specified range, replace the S117 refuel request switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Fuel Tank Filler Door Lock Release Switch Replacement Fuel Tank Filler Door Lock Release Switch Replacement
* Control Module References Programming and Relearning for the hybrid powertrain control module 2 replacement, programming and setup