LIFTGATE DOES NOT OPEN [SECURITY AND LOCKS]

id0903k7027000

Outline

Description

•  Liftgate does not open even if liftgate opener switch is pressed

Possible cause

•  Connector or terminal malfunction of the following parts:

―  Liftgate opener switch

―  Liftgate latch and lock actuator

―  BCM

―  Electrical supply unit

•  Open circuit in liftgate opener switch signal circuit

•  Open circuit in liftgate opener switch ground circuit

•  Short to ground or open circuit in liftgate latch and lock actuator signal circuit

•  Open circuit in liftgate latch and lock actuator ground circuit

•  Liftgate opener switch malfunction

•  Liftgate latch and lock actuator malfunction

•  Electrical supply unit malfunction

•  BCM malfunction

Diagnostic Procedure

Step

Inspection

Results

Action

1

VERIFY ALL SYSTEM DTCs

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

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

Go to the next step.

2

INSPECT LIFTGATE OPENER SWITCH, LIFTGATE LATCH AND LOCK ACTUATOR, BCM, AND ELECTRICAL SUPPLY UNIT CONNECTORS 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 LIFTGATE OPENER SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT

•  Inspect the signal circuit for 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.

4

INSPECT LIFTGATE OPENER SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT

•  Inspect the ground circuit for 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.

5

INSPECT LIFTGATE LATCH AND LOCK ACTUATOR SIGNAL CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT

•  Inspect the signal circuit for a short to ground and 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 LIFTGATE LATCH AND LOCK ACTUATOR GROUND CIRCUIT FOR OPEN CIRCUIT

•  Inspect the ground circuit for 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.

7

INSPECT LIFTGATE OPENER SWITCH FOR MALFUNCTION

•  Inspect the applicable part.
(See LIFTGATE OPENER SWITCH INSPECTION.)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See LIFTGATE OPENER SWITCH REMOVAL/INSTALLATION.)

8

INSPECT LIFTGATE LATCH AND LOCK ACTUATOR FOR MALFUNCTION

•  Inspect the applicable part.
(See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)

9

INSPECT ELECTRICAL SUPPLY UNIT FOR MALFUNCTION

•  Inspect the applicable part.
(See ELECTRICAL SUPPLY UNIT (ESU) INSPECTION [(E)].)

•  Is the part normal?

Yes

Go to the next step.

No

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

(See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)

Repair completion verification

VERIFY THAT VEHICLE IS REPAIRED

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

•  Has the malfunction symptom been eliminated?

Yes

Complete the symptom troubleshooting. (Explain contents of repair to customer)

No

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 [L.H.D. (E)].)

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].)

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

•  If the malfunction is not resolved, replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)

Description	• Liftgate does not open even if liftgate opener switch is pressed
Possible cause	• Connector or terminal malfunction of the following parts: ― Liftgate opener switch ― Liftgate latch and lock actuator ― BCM ― Electrical supply unit • Open circuit in liftgate opener switch signal circuit • Open circuit in liftgate opener switch ground circuit • Short to ground or open circuit in liftgate latch and lock actuator signal circuit • Open circuit in liftgate latch and lock actuator ground circuit • Liftgate opener switch malfunction • Liftgate latch and lock actuator malfunction • Electrical supply unit malfunction • BCM malfunction

Step	Inspection	Results	Action
1	VERIFY ALL SYSTEM DTCs • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
1		No	Go to the next step.
2	INSPECT LIFTGATE OPENER SWITCH, LIFTGATE LATCH AND LOCK ACTUATOR, BCM, AND ELECTRICAL SUPPLY UNIT CONNECTORS 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 LIFTGATE OPENER SWITCH SIGNAL CIRCUIT FOR OPEN CIRCUIT • Inspect the signal circuit for open circuit (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 LIFTGATE OPENER SWITCH GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the ground circuit for open circuit. (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 LIFTGATE LATCH AND LOCK ACTUATOR SIGNAL CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT • Inspect the signal circuit for a short to ground and 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 LIFTGATE LATCH AND LOCK ACTUATOR GROUND CIRCUIT FOR OPEN CIRCUIT • Inspect the ground circuit for open circuit. (See CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
6		No	Repair or replace the malfunctioning location and perform the repair completion verification.
7	INSPECT LIFTGATE OPENER SWITCH FOR MALFUNCTION • Inspect the applicable part. (See LIFTGATE OPENER SWITCH INSPECTION.) • Is the part normal?	Yes	Go to the next step.
7		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See LIFTGATE OPENER SWITCH REMOVAL/INSTALLATION.)
8	INSPECT LIFTGATE LATCH AND LOCK ACTUATOR FOR MALFUNCTION • Inspect the applicable part. (See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.) • Is the part normal?	Yes	Go to the next step.
8		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
9	INSPECT ELECTRICAL SUPPLY UNIT FOR MALFUNCTION • Inspect the applicable part. (See ELECTRICAL SUPPLY UNIT (ESU) INSPECTION [(E)].) • Is the part normal?	Yes	Go to the next step.
9		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION.)
Repair completion verification	VERIFY THAT VEHICLE IS REPAIRED • Install/connect the part removed/disconnected during the troubleshooting procedure. • Has the malfunction symptom been eliminated?	Yes	Complete the symptom troubleshooting. (Explain contents of repair to customer)
Repair completion verification		No	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 [L.H.D. (E)].) (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [R.H.D.].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction is not resolved, replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)