Volt

DTC P169D

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 centre to display the Wait to Refuel message. The hybrid powertrain control module 2 then energises the fuel door lock/unlock actuator to unlock the fuel door

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.

DTC P169D 00 is a type B DTC

Schematic Reference

Release Systems Schematics : Tailgate Schematics → Release System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Fuel Fill Door Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

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

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.

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 Ω 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.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.