Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptor
DTC B153B 02
- Liftgate Open Switch Signal Circuit Short to Ground
DTC B153B 05
- Liftgate Open Switch Signal Circuit Open
Diagnostic Fault Information
Circuit/System Description
The full open switch is part of the gear motor assembly and will close and become active when the liftgate reaches the full open position. The full
open switch signal circuit is supplied battery voltage through a resistor and monitored within the liftgate control module. The liftgate control module
(LGM) provides a low reference circuit and when the switch contacts close, the signal circuit goes low and the LGM determines the switch to be
active.
Conditions for Running the DTC
* The system voltage is 9-16 volts.
* Power open or close operation is attempted.
Conditions for Setting the DTC
B153B 02
The LGM detects a short to ground in the full open switch signal circuit
