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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 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 operation of the fuel filler door when commanding the fuel door lock actuator to UNLATCH by pressing the refuel request switch.

• If the fuel door lock actuator does not UNLATCH
Refer to Circuit/System Testing

• If the fuel door lock actuator does UNLATCH

3. All OK.

Circuit/System Testing

1. Vehicle OFF, disconnect the harness connector at the S117 refuel request switch. Vehicle in Service Mode.

2. Verify a test lamp illuminates between the B+ circuit terminal 1 and ground.

• If the test lamp does not illuminate and the circuit fuse is good

1. Vehicle OFF.

2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, verify the fuse is not open and there is voltage at the fuse.

• If the test lamp does not illuminate and the circuit fuse is open

1. Vehicle OFF.

2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.

4. Test for infinite resistance between the signal circuit terminal 2 and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the K114B hybrid powertrain control module 2.

• If the test lamp illuminates

3. Vehicle OFF, connect the harness connector at the S117 refuel request switch. Disconnect the X2 harness connector at the K114B hybrid powertrain control module 2.

4. Connect a test lamp between the signal circuit terminal 7 and ground.

5. Verify the test lamp turns ON and OFF by pressing the S117 refuel request switch.

• If the test lamp is always OFF

1. Vehicle OFF, disconnect the harness connector at the S117 refuel request switch.

2. Test for infinite resistance between the signal 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 control circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, test or replace the S117 refuel request switch.

• If the test lamp is always ON

1. Vehicle OFF, disconnect the harness connector at the S117 refuel request switch, Vehicle in Service Mode.

2. Test for less than 1 V between the control circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V, test or replace the S117 refuel request switch.

• If the test lamp turns ON and OFF

6. 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 2 and the B+ terminal 1 with the switch in the open position.

• If less than infinite resistance
Replace the S117 refuel request switch.

• If infinite resistance

3. Test for less than 3 ohms between the signal terminal 2 and the B+ terminal 1 with the switch in the closed position.

• If 3 ohms or greater
Replace the S117 refuel request switch.

• If less than 3 ohms

4. All OK

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

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