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| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
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 provide 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 is awake |
| • | The fuel tank is being filled. |
The hybrid powertrain control module 2 has detected that the fuel level in the fuel tank has increased but detects that the fuel filler door was always in the closed position.
The driver information centre will display the Service Refuel System message.
DTC P04B6 is a type B DTC.
Release Systems Schematics : Tailgate Schematics → Release System Schematics
Fuel Fill Door Description and Operation
Control Module References for scan tool information
Observe the scan tool Fuel Door Position parameter while opening and closing the fuel filler door, the value should change between Open and Closed as the fuel filler door is opened and closed.
| ⇒ | If the value is always Open or always Closed, refer to Fuel Filler Door Ajar Indicator Malfunction . |
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