Diagnostic Instructions

DTC Descriptors

DTC B2495 01: Endgate/Liftgate Latch Control Circuit Short to Battery

DTC B2495 02: Endgate/Liftgate Latch Control Circuit Short to Ground

DTC B2495 04: Endgate/Liftgate Latch Control Circuit Open Circuit

Diagnostic Fault Information

Circuit	Short to Ground	Open/High Resistance	Short to Voltage	Signal Performance
Liftgate Module B+	B153A 08, B396A 02	B153A 08, B396A 02	--	--
Liftgate Module B+	U0230 00	U0230 00	--	--
Liftgate Position Sensor 5V Reference Voltage	B153E 02	B153B 08	2	B1019 00
Full Open Signal	B153E 08	B153B 05	2	--
Object Sensors Signal	B153F 02	B153F 05	B153F 05	B153F 03, B153F 07
Open/Close Switches Signal	B2494 02	1, 2	1, 2	--
Pawl Switch Signal	B153A 00	B153A 08	B153A 00	B153A 08
Position Sensor Signal 1	B153E 08	B153E 08	B153E 05	--
Position Sensor Signal 2	B153E 08	B153A 08	B153E 05	B153E 08
Ratchet Switch Signal	B153A 00	B153A 08	B153A 00	B153A 08
Sector Switch Signal	B153A 00	B153A 00	B153A 00	B153A 08
Disengage Clutch Control	B396B 02	B396B 04	B396B 01	--
Engage Clutch Control	B396B 02	B396B 04	B396B 01	--
Liftgate Latch Cinch Control	B2495 02	B2495 04	B2495 01	--
Liftgate Latch Release Control	B2495 02	B2495 04	B2495 01	--
Liftgate Motor Close Control	B396A 02	B396A 04	B396A 01	B153E 08
Liftgate Motor Open Control	B396A 02	B396A 04	B396A 01	B153E 08
Full Open Low Reference	--	B153B 05	2	--
Liftgate Switches Low Reference	--	B153A 08	1	B153E 08
Position Sensor Low Reference	--	B153E 08	2	--
Liftgate Control Module Ground	--	U0230 00	2	--
1. Liftgate Switch Malfunction 2. Liftgate Malfunction

Circuit/System Description

The latch motor is a bi-directional motor and cinch or unlatch operation is the result of the direction of the motor rotation. The liftgate module (LGM) controls the latch motor through the control circuits by supplying power and ground in the appropriate polarity. The motor control circuits are monitored by the LGM prior to activation for a high or low condition and during motor operation for an insufficient current flow condition.

Conditions for Running the DTC

The system voltage is 9-16 volts.

Conditions for Setting the DTC

B2495 01

The LGM detects a short to voltage in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 02

The LGM detects a short to ground in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

B2495 04

The LGM detects an open/high resistance in the liftgate latch motor open control circuit or the liftgate latch motor close control circuit.

Action Taken When the DTC Sets

The liftgate latch will be inoperative.

Conditions for Clearing the DTC

Diagnostic Aids

Whenever the LGM loses power or is disconnected, the ignition must be cycled OFF then ON in order to reactivate the LGM.

Reference Information

Schematic Reference

Liftgate Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Liftgate Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Ignition ON, command the liftgate to OPEN and CLOSE with the scan tool. The liftgate latch assembly should release the liftgate allowing the liftgate to open.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the liftgate latch assembly.
2. Test for less than 5 ohms between the control circuit terminal 1 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the LGM.

3. Test for less than 5 ohms between the control circuit terminal 3 and ground.

⇒	If greater than the specified range, test the control circuit for a short to voltage or an open/high resistance. If circuits test normal, replace the LGM.

4. Connect a test lamp between control circuit terminal 1 and ground.
5. Install a jumper wire between the low reference circuit terminal 2 and ground.
6. Ignition ON, command the liftgate to OPEN by pressing and releasing the liftgate close switch. The test lamp should illuminate while commanding the OPEN state.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the LGM.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the LGM.

7. Ignition OFF, connect a test lamp between the control circuit terminal 3 and ground.
8. Connect a 3A fused jumper wire between the signal circuit terminal 6 and ground.
9. Ignition ON, command the liftgate to CLOSE by pressing and releasing the liftgate close switch. The test lamp should illuminate while commanding the CLOSE state.

⇒	If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the LGM.

⇒	If the test lamp is always ON, test the control circuit for a short to voltage, if the circuit tests normal, replace the LGM.

10. If all circuits test normal, test or replace the liftgate latch assembly.

Component Testing

1. Ignition OFF, disconnect the harness connector at the liftgate latch.
2. Install a 20A fused jumper wire between the control terminal 1 and 12 volts. Momentarily install a jumper wire between the control terminal 3 and ground. The liftgate latch should perform the CINCH or RELEASE function.

⇒	If the function does not perform as specified, replace the liftgate latch.

3. Reverse the jumper wires; the liftgate should perform the RELEASE or CINCH function.

⇒	If the function does not perform as specified, replace the liftgate latch.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for LGM replacement, setup and programming