Pinpoint Test B : The Liftgate Unlatches But The Power Liftgate Is Inoperative: Notes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

Refer to Power Liftgate/Retractable Running Boards for schematic and connector information.

Normal Operation and Fault Conditions

REFER to: Body Closures - System Operation and Component Description .

RGTM DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
B144D:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 1: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 1 input or the sensor inputs are out of phase.
B144E:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 2: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 2 input or the sensor inputs are out of phase.
B1556:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 3: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 3 input or the sensor inputs are out of phase.
B1555:29	Tailgate/Liftgate/Boot/Trunk Position Sensor 4: Signal Invalid	Sets when the RGTM receives no signal from the liftgate motor sensor 4 input or the sensor inputs are out of phase.
B144F:11	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the Left power liftgate motor circuitry.
B144F:12	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Short To Battery	Sets when the RGTM detects a short to voltage from the Left power liftgate motor circuitry.
B144F:13	Tailgate/Liftgate/Boot/Trunk Driver Motor: Circuit Open	Sets when the RGTM detects an open from the Left power liftgate motor circuitry.
B144F:79	Tailgate/Liftgate/Boot/Trunk Driver Motor: Mechanical Linkage Failure	Sets when the RGTM detects the power liftgate requires extra effort to open or the hydraulic strut does not keep the liftgate open.
B1557:11	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Ground	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
B1557:12	Power Liftgate/Decklid Driver Motor 2: Circuit Short To Battery	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
B1557:13	Power Liftgate/Decklid Driver Motor 2: Circuit Open	Sets when the RGTM detects an open from the Right power liftgate motor circuitry.
B1515:97	Tailgate/Liftgate/Boot/Trunk: Component or System Operation Obstructed or Blocked	Sets when the RGTM detects the power liftgate requires extra effort to open or the hydraulic strut does not keep the liftgate open.
B145D:11	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Ground	Sets when the RGTM detects a short to ground from one of the liftgate latch motor circuits.
B145D:12	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Short To Battery	Sets when the RGTM detects a short to voltage from one of the liftgate latch motor circuits.
B145D:13	Tailgate/Liftgate/Boot/Trunk Power Cinch Striker Motor: Circuit Open	Sets when the RGTM detects an open from one of the liftgate latch motor circuits.
B1A59:11	Sensor 5 Volt Supply: Circuit Short To Ground	Sets when the RGTM detects a short to ground from the power liftgate motor sensor voltage supply circuit.
B1A59:13	Sensor 5 Volt Supply: Circuit Open	Sets when the RGTM detects an open from the power liftgate motor sensor circuitry.

Possible Causes

Wiring, terminals or connectors
Liftgate latch
Power liftgate motor
RGTM