SEAT WARMER ON SEAT BACK SIDE DOES NOT WARM UP [SEAT WARMER SYSTEM]

id0903m2022400

Note

• When the seat warmer switch is turned on with the ignition switched ON (engine on), the seat warmer system operates.

Outline

Description

• The seat warmer on the seat cushion side warms up, but the seat warmer on the seat back side does not.

Possible cause

• Seat warmer unit 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 SEAT WARMER UNIT FOR MALFUNCTION

•  Inspect the applicable part.
(See SEAT WARMER UNIT 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 FRONT SEAT BACK TRIM REMOVAL/INSTALLATION [(E)].)

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

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 [(E)].)

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

Description	• The seat warmer on the seat cushion side warms up, but the seat warmer on the seat back side does not.
Possible cause	• Seat warmer unit 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 SEAT WARMER UNIT FOR MALFUNCTION • Inspect the applicable part. (See SEAT WARMER UNIT INSPECTION [(E)].) • 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 FRONT SEAT BACK TRIM REMOVAL/INSTALLATION [(E)].) (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION [(E)].)
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 [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1.