WALK-IN SYSTEM DOES NOT OPERATE [POWER SEAT SYSTEM]

id0903p4027200

Outline

Description

•  With occupant not seated in the front seat (driver's side), reclining and sliding of the driver’s seat do not operate when the walk-in switch on the back of the front seat back is operated.

Possible cause

•  Walk-in switch malfunction

•  Walk in control circuit malfunction

•  Occupancy sensor 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 WALK IN SWITCH FOR MALFUNCTION

•  Inspect the applicable part.
(See WALK IN 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 WALK IN SWITCH REMOVAL/INSTALLATION.)

3

INSPECT WALK IN CONTROL CIRCUIT FOR MALFUNCTION

•  Inspect the applicable part.
(See WALK IN CONTROL CIRCUIT INSPECTION.)

•  Is the circuit normal?

Yes

Go to the next step.

No

Replace the front seat wiring harness (driver’s side) and perform the repair completion verification.

4

INSPECT OCCUPANCY SENSOR FOR MALFUNCTION

•   Inspect the applicable part.
(See OCCUPANCY SENSOR INSPECTION.)

•  Is the part normal?

Yes

Replace the front seat cushion (driver's side) and perform the repair completion verification.

(See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION [(E)].)

No

Go to the next step.

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 position memory control module.
(See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION.)

Description	• With occupant not seated in the front seat (driver's side), reclining and sliding of the driver’s seat do not operate when the walk-in switch on the back of the front seat back is operated.
Possible cause	• Walk-in switch malfunction • Walk in control circuit malfunction • Occupancy sensor 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 WALK IN SWITCH FOR MALFUNCTION • Inspect the applicable part. (See WALK IN SWITCH INSPECTION.) • Is the part normal?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning location and perform the repair completion verification. (See WALK IN SWITCH REMOVAL/INSTALLATION.)
3	INSPECT WALK IN CONTROL CIRCUIT FOR MALFUNCTION • Inspect the applicable part. (See WALK IN CONTROL CIRCUIT INSPECTION.) • Is the circuit normal?	Yes	Go to the next step.
3		No	Replace the front seat wiring harness (driver’s side) and perform the repair completion verification.
4	INSPECT OCCUPANCY SENSOR FOR MALFUNCTION • Inspect the applicable part. (See OCCUPANCY SENSOR INSPECTION.) • Is the part normal?	Yes	Replace the front seat cushion (driver's side) and perform the repair completion verification. (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION [(E)].)
4		No	Go to the next step.
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 position memory control module. (See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION.)