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DTC B144D:95 [BODY CONTROL MODULE (BCM)]

id0902r7133400

Outline

System malfunction location

Error signal received from power liftgate (PLG) drive unit (LH)

Detection condition

•  The power liftgate (PLG) control module detects a pulse opposite to the direction from the power liftgate (PLG) drive unit (LH) for a continuous 5 times.

Fail-safe

•  Stops the power liftgate (PLG) system operation.

Possible cause

•  Power liftgate (PLG) drive unit (LH) connector or terminal malfunction

•  Power liftgate (PLG) control module connector or terminal malfunction

•  Short to ground in power liftgate (PLG) drive unit (LH) signal circuit

•  Short to power supply in power liftgate (PLG) drive unit (LH) signal circuit

•  Open circuit in power liftgate (PLG) drive unit (LH) signal circuit

•  Power liftgate (PLG) drive unit (LH) malfunction

•  Power liftgate (PLG) control module malfunction

•  Body control module (BCM) malfunction

System malfunction location	Error signal received from power liftgate (PLG) drive unit (LH)
Detection condition	• The power liftgate (PLG) control module detects a pulse opposite to the direction from the power liftgate (PLG) drive unit (LH) for a continuous 5 times.
Fail-safe	• Stops the power liftgate (PLG) system operation.
Possible cause	• Power liftgate (PLG) drive unit (LH) connector or terminal malfunction • Power liftgate (PLG) control module connector or terminal malfunction • Short to ground in power liftgate (PLG) drive unit (LH) signal circuit • Short to power supply in power liftgate (PLG) drive unit (LH) signal circuit • Open circuit in power liftgate (PLG) drive unit (LH) signal circuit • Power liftgate (PLG) drive unit (LH) malfunction • Power liftgate (PLG) control module malfunction • Body control module (BCM) malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

2

INSPECT POWER LIFTGATE (PLG) CONTROL MODULE CONNECTOR FOR MALFUNCTION

•  Inspect the applicable connector and terminal.
(See CONNECTOR INSPECTION.)

•  Are the connector and terminal normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

3

INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR SHORT TO GROUND

•  Inspect the applicable circuit for a short to ground.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

4

INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY

•  Inspect the applicable circuit for a short to power supply.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

5

INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR OPEN CIRCUIT

•  Inspect the applicable circuit for an open circuit.
(See CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location and perform the repair completion verification.

6

INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) FOR MALFUNCTION DEPENDING ON REPEATABILITY

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Operate the power liftgate (PLG) system.

•  Perform the DTC inspection for the body control module (BCM).
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, replace the power liftgate (PLG) drive unit (LH), then go to the next step.

(See POWER LIFTGATE (PLG) DRIVE UNIT REMOVAL/INSTALLATION.)

No

Go to repair completion verification 2.

7

INSPECT POWER LIFTGATE (PLG) CONTROL MODULE FOR MALFUNCTION DEPENDING ON REPEATABILITY

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Operate the power liftgate (PLG) system.

•  Perform the DTC inspection for the body control module (BCM).
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, replace the power liftgate (PLG) control module and perform the repair completion verification.

(See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)

No

Go to repair completion verification 2.

Repair completion verification 1

VERIFY THAT VEHICLE IS REPAIRED

•  Install/connect the part removed/disconnected during the troubleshooting procedure.

•  Clear the DTC recorded in the memory.
(See CLEARING DTC.)

•  Operate the power liftgate (PLG) system.

•  Perform the DTC inspection for the body control module (BCM).
(See DTC INSPECTION.)

•  Is the same Pending DTC present?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the body control module (BCM), then go to the next step.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTC IS DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
1		No	Repair or replace the malfunctioning location and perform the repair completion verification.
2	INSPECT POWER LIFTGATE (PLG) CONTROL MODULE CONNECTOR FOR MALFUNCTION • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION.) • Are the connector and terminal normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification.
3	INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR SHORT TO GROUND • Inspect the applicable circuit for a short to ground. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
3		No	Repair or replace the malfunctioning location and perform the repair completion verification.
4	INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY • Inspect the applicable circuit for a short to power supply. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
4		No	Repair or replace the malfunctioning location and perform the repair completion verification.
5	INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect the applicable circuit for an open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
5		No	Repair or replace the malfunctioning location and perform the repair completion verification.
6	INSPECT POWER LIFTGATE (PLG) DRIVE UNIT (LH) FOR MALFUNCTION DEPENDING ON REPEATABILITY • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Operate the power liftgate (PLG) system. • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, replace the power liftgate (PLG) drive unit (LH), then go to the next step. (See POWER LIFTGATE (PLG) DRIVE UNIT REMOVAL/INSTALLATION.)
6		No	Go to repair completion verification 2.
7	INSPECT POWER LIFTGATE (PLG) CONTROL MODULE FOR MALFUNCTION DEPENDING ON REPEATABILITY • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Operate the power liftgate (PLG) system. • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, replace the power liftgate (PLG) control module and perform the repair completion verification. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
7		No	Go to repair completion verification 2.
Repair completion verification 1	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Clear the DTC recorded in the memory. (See CLEARING DTC.) • Operate the power liftgate (PLG) system. • Perform the DTC inspection for the body control module (BCM). (See DTC INSPECTION.) • Is the same Pending DTC present?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the body control module (BCM), then go to the next step. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION [(E)].)
Repair completion verification 1		No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTC IS DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification 2		No	DTC troubleshooting completed.