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Pinpoint Test A : The Power Liftgate Is Inoperative: Notes

WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Power Liftgate , for schematic and connector information.

Normal Operation and Fault Conditions 

Refer to Body Closures .

During power opening and/or power closing operation, the LTM receives inputs from the following system components:

During power opening and/or power closing operation, the LTM provides outputs to the following system components:

LTM DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
B106E Solid State Driver Disabled Due to Short Circuit Sets when the LTM detects a short to ground from the power liftgate clutch power circuit. The power liftgate is disabled until the fault is corrected and this DTC is cleared (unless LTM DTC B106F is also present).
B106F Module Disabled Due to External Fault Sets when the LTM has permanently disabled the power liftgate clutch power circuit due to a repetitive circuit overload. This DTC cannot be cleared. Repair the cause of the excessive high current craw from the clutch actuator circuit.
B1179 Latch Motor Circuit Short to Battery Sets when the LTM detects a short to battery from one of the latch motor circuits.
B117A Latch Motor Circuit Short to Ground Sets when the LTM detects a short to ground from one of the latch motor circuits.
B117B Latch Motor Circuit Open Sets when the LTM detects an open from one of the latch motor circuits.
B2418 Sensor Power Short to Ground Sets when the LTM detects a short to ground from the position sensor 5-volt power circuit.
B2419 Sensor 1 Invalid Sets when the LTM detects the position sensor feedback signals are not correct.
B2420 Sensor 2 Invalid Sets when the LTM detects the position sensor feedback signals are not correct.
B2552 Vbatt. 2 Circuit Open Sets when the LTM does not detect battery voltage from the high current power feed circuit.
B2819 Gate Motor Circuit Short to Battery Sets when the LTM detects a short to battery from one of the power liftgate motor circuits.
B2908 Latch Switch Invalid Sets when the LTM detects the liftgate is not in the fully latched (primary) position at the beginning of the self-test. This may also set if the LTM does not detect a change in the latch status during latch releasing/cinching.
B2935 Drive Unit Failure Sets when the time to complete a LTM self-test cycle (power open and power close to fully latched position) exceeds 20 seconds.
B2936 Gate Motor Open Sets when the LTM detects an open from one of the power liftgate motor circuits.
B2937 Gate Motor Short to Ground Sets when the LTM detects a short to ground from one of the power liftgate motor circuits.
B2939 Gate Clutch Short to Ground or Open Sets when the LTM detects an open or short to ground from the actuator clutch power circuit.

Possible Causes 

Visual Inspection and Diagnostic Pre-checks 

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