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DTC B103A:63 [DASH-ELECTRICAL SUPPLY UNIT (E)]

id0702k80014ka

Without Position Memory System (L.H.D.)

Outline

System malfunction location

Seat warmer unit (RH) circuit malfunction (Thermistor side)

Detection condition

•  The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).

Fail-safe

•  Stops the driver and front passenger’s seat warmer output.

Possible cause

•  DTCs are stored in the dash-electrical supply unit.

―  Other DTCs related to seat warmer unit (RH) circuit are stored

•  Seat warmer control unit connector or terminal malfunction

•  Front seat (RH) malfunction

―  Short to power supply in any of following seat warmer unit (RH) circuits:

•  Signal circuit

•  Ground circuit

―  Seat warmer unit (RH) malfunction

•  Seat warmer control unit malfunction

•  Dash-electrical supply unit malfunction

System malfunction location	Seat warmer unit (RH) circuit malfunction (Thermistor side)
Detection condition	• The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).
Fail-safe	• Stops the driver and front passenger’s seat warmer output.
Possible cause	• DTCs are stored in the dash-electrical supply unit. ― Other DTCs related to seat warmer unit (RH) circuit are stored • Seat warmer control unit connector or terminal malfunction • Front seat (RH) malfunction ― Short to power supply in any of following seat warmer unit (RH) circuits: • Signal circuit • Ground circuit ― Seat warmer unit (RH) malfunction • Seat warmer control unit malfunction • Dash-electrical supply unit malfunction

Diagnostic procedure

Step

Inspection

Results

Action

1

VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT

•  Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)

•  Are other DTCs related to the seat warmer unit (RH) circuit displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)

No

Go to the next step.

2

INSPECT SEAT WARMER CONTROL UNIT 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 SEAT WARMER UNIT (RH) AND SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND CIRCUIT FOR MALFUNCTION

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

•  Switch the ignition off.

•  Switch the ignition ON (engine off or on).

•  With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side).

―  Seat warmer control unit terminal 2O

―  Seat warmer control unit terminal 2X

•  Does the resistance change with the elapse of time (temperature increase)?

Yes

Go to the next step.

No

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

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

4

INSPECT SEAT WARMER CONTROL UNIT 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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 malfunctioning location and perform the repair completion verification.

(See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION [(E)].)

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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 dash-electrical supply unit, then go to the next step.
(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

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

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT • Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.) • Are other DTCs related to the seat warmer unit (RH) circuit displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)
No	Go to the next step.
2	INSPECT SEAT WARMER CONTROL UNIT 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 SEAT WARMER UNIT (RH) AND SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND CIRCUIT FOR MALFUNCTION • Install/connect the part removed/disconnected during the troubleshooting procedure. • Switch the ignition off. • Switch the ignition ON (engine off or on). • With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side). ― Seat warmer control unit terminal 2O ― Seat warmer control unit terminal 2X • Does the resistance change with the elapse of time (temperature increase)?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location and perform the repair completion verification. (See FRONT SEAT REMOVAL/INSTALLATION [(E)].)
4	INSPECT SEAT WARMER CONTROL UNIT 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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 malfunctioning location and perform the repair completion verification. (See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION [(E)].)
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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 dash-electrical supply unit, then go to the next step. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].) (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

With Position Memory System (L.H.D.)

Outline

System malfunction location

Seat warmer unit (RH) circuit malfunction (Thermistor side)

Detection condition

•  The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).

Fail-safe

•  Stops the driver and front passenger’s seat warmer output.

Possible cause

•  DTCs are stored in the dash-electrical supply unit.

―  Other DTCs related to seat warmer unit (RH) circuit are stored

•  Seat warmer control unit connector or terminal malfunction

•  Connector C-62 malfunction

•  Short to power supply in any of following seat warmer unit (RH) circuits:

―  Signal circuit

―  Ground circuit

•  Front seat (RH) malfunction

―  Seat warmer unit (RH) malfunction

•  Seat warmer control unit malfunction

•  Dash-electrical supply unit malfunction

System malfunction location	Seat warmer unit (RH) circuit malfunction (Thermistor side)
Detection condition	• The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).
Fail-safe	• Stops the driver and front passenger’s seat warmer output.
Possible cause	• DTCs are stored in the dash-electrical supply unit. ― Other DTCs related to seat warmer unit (RH) circuit are stored • Seat warmer control unit connector or terminal malfunction • Connector C-62 malfunction • Short to power supply in any of following seat warmer unit (RH) circuits: ― Signal circuit ― Ground circuit • Front seat (RH) malfunction ― Seat warmer unit (RH) malfunction • Seat warmer control unit malfunction • Dash-electrical supply unit malfunction

Diagnostic procedure

Step

Inspection

Results

Action

1

VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT

•  Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)

•  Are other DTCs related to the seat warmer unit (RH) circuit displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)

No

Go to the next step.

2

INSPECT SEAT WARMER CONTROL UNIT 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 CONNECTOR C-62 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.

4

INSPECT SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND 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 SEAT WARMER UNIT (RH) FOR MALFUNCTION

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

•  Switch the ignition off.

•  Switch the ignition ON (engine off or on).

•  With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side).

―  Connector C-62 terminal 6C

―  Connector C-62 terminal 6D

•  Does the resistance change with the elapse of time (temperature increase)?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location, then go to the next step.

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

6

INSPECT SEAT WARMER CONTROL UNIT 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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 malfunctioning location and perform the repair completion verification.

(See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION [(E)].)

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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 dash-electrical supply unit, then go to the next step.
(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

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

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT • Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.) • Are other DTCs related to the seat warmer unit (RH) circuit displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)
No	Go to the next step.
2	INSPECT SEAT WARMER CONTROL UNIT 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 CONNECTOR C-62 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.
4	INSPECT SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND 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 SEAT WARMER UNIT (RH) FOR MALFUNCTION • Install/connect the part removed/disconnected during the troubleshooting procedure. • Switch the ignition off. • Switch the ignition ON (engine off or on). • With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side). ― Connector C-62 terminal 6C ― Connector C-62 terminal 6D • Does the resistance change with the elapse of time (temperature increase)?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location, then go to the next step. (See FRONT SEAT REMOVAL/INSTALLATION [(E)].)
6	INSPECT SEAT WARMER CONTROL UNIT 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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 malfunctioning location and perform the repair completion verification. (See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION [(E)].)
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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 dash-electrical supply unit, then go to the next step. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].) (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

Without Position Memory System (R.H.D.)

Outline

System malfunction location

Seat warmer unit (RH) circuit malfunction (Thermistor side)

Detection condition

•  The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).

Fail-safe

•  Stops the driver and front passenger’s seat warmer output.

Possible cause

•  DTCs are stored in the dash-electrical supply unit.

―  Other DTCs related to seat warmer unit (RH) circuit are stored

•  Seat warmer control unit connector or terminal malfunction

•  Connector C-61 malfunction

•  Short to power supply in any of following seat warmer unit (RH) circuits:

―  Signal circuit

―  Ground circuit

•  Front seat (RH) malfunction

―  Seat warmer unit (RH) malfunction

•  Seat warmer control unit malfunction

•  Dash-electrical supply unit malfunction

System malfunction location	Seat warmer unit (RH) circuit malfunction (Thermistor side)
Detection condition	• The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).
Fail-safe	• Stops the driver and front passenger’s seat warmer output.
Possible cause	• DTCs are stored in the dash-electrical supply unit. ― Other DTCs related to seat warmer unit (RH) circuit are stored • Seat warmer control unit connector or terminal malfunction • Connector C-61 malfunction • Short to power supply in any of following seat warmer unit (RH) circuits: ― Signal circuit ― Ground circuit • Front seat (RH) malfunction ― Seat warmer unit (RH) malfunction • Seat warmer control unit malfunction • Dash-electrical supply unit malfunction

Diagnostic procedure

Step

Inspection

Results

Action

1

VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT

•  Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)

•  Are other DTCs related to the seat warmer unit (RH) circuit displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)

No

Go to the next step.

2

INSPECT SEAT WARMER CONTROL UNIT 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 CONNECTOR C-61 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.

4

INSPECT SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND 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 SEAT WARMER UNIT (RH) FOR MALFUNCTION

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

•  Switch the ignition off.

•  Switch the ignition ON (engine off or on).

•  With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side).

―  Connector C-61 terminal 6C

―  Connector C-61 terminal 6D

•  Does the resistance change with the elapse of time (temperature increase)?

Yes

Go to the next step.

No

Repair or replace the malfunctioning location, then go to the next step.

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

6

INSPECT SEAT WARMER CONTROL UNIT 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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 malfunctioning location and perform the repair completion verification.

(See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION [(E)].)

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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 dash-electrical supply unit, then go to the next step.
(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

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

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT • Perform the DTC inspection for the dash-electrical supply unit. (See DTC INSPECTION.) • Are other DTCs related to the seat warmer unit (RH) circuit displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting. (See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)
No	Go to the next step.
2	INSPECT SEAT WARMER CONTROL UNIT 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 CONNECTOR C-61 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.
4	INSPECT SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND 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 SEAT WARMER UNIT (RH) FOR MALFUNCTION • Install/connect the part removed/disconnected during the troubleshooting procedure. • Switch the ignition off. • Switch the ignition ON (engine off or on). • With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side). ― Connector C-61 terminal 6C ― Connector C-61 terminal 6D • Does the resistance change with the elapse of time (temperature increase)?	Yes	Go to the next step.
No	Repair or replace the malfunctioning location, then go to the next step. (See FRONT SEAT REMOVAL/INSTALLATION [(E)].)
6	INSPECT SEAT WARMER CONTROL UNIT 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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 malfunctioning location and perform the repair completion verification. (See SEAT WARMER CONTROL UNIT REMOVAL/INSTALLATION [(E)].)
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.) • Perform the DTC inspection for the dash-electrical supply unit. (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 dash-electrical supply unit, then go to the next step. (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].) (See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)
No	Go to the next step.
Repair completion verification 2	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
No	DTC troubleshooting completed.

With Position Memory System (R.H.D.)

Outline

System malfunction location	Seat warmer unit (RH) circuit malfunction (Thermistor side)
Detection condition	• The dash-electrical supply unit detects the output time-out status on the heater side due to a malfunction on the thermistor side of the seat warmer unit (RH).
Fail-safe	• Stops the driver and front passenger’s seat warmer output.
Possible cause	• DTCs are stored in the dash-electrical supply unit. ― Other DTCs related to seat warmer unit (RH) circuit are stored • Seat warmer control unit connector or terminal malfunction • Front seat (RH) malfunction ― Short to power supply in any of following seat warmer unit (RH) circuits: • Signal circuit • Ground circuit ― Seat warmer unit (RH) malfunction • Seat warmer control unit malfunction • Dash-electrical supply unit malfunction

Diagnostic procedure

Step

Inspection

Results

Action

1

VERIFY OTHER DTCs RELATED TO SEAT WARMER UNIT (RH) CIRCUIT

•  Perform the DTC inspection for the dash-electrical supply unit.
(See DTC INSPECTION.)

•  Are other DTCs related to the seat warmer unit (RH) circuit displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

(See DTC TABLE [DASH-ELECTRICAL SUPPLY UNIT (E)].)

No

Go to the next step.

2

INSPECT SEAT WARMER CONTROL UNIT 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 SEAT WARMER UNIT (RH) AND SEAT WARMER UNIT (RH) SIGNAL CIRCUIT AND GROUND CIRCUIT FOR MALFUNCTION

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

•  Switch the ignition off.

•  Switch the ignition ON (engine off or on).

•  With the seat warmer switch (RH) turned on, measure the resistance between the following terminals (vehicle wiring harness side).

―  Seat warmer control unit terminal 2O

―  Seat warmer control unit terminal 2X

•  Does the resistance change with the elapse of time (temperature increase)?

Yes

Go to the next step.

No

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

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

4

INSPECT SEAT WARMER CONTROL UNIT 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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 malfunctioning location and perform the repair completion verification.

(See POSITION MEMORY CONTROL MODULE REMOVAL/INSTALLATION [(E)].)

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.)

•  Perform the DTC inspection for the dash-electrical supply unit.
(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 dash-electrical supply unit, then go to the next step.
(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (E)].)

(See DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (E)].)

No

Go to the next step.

Repair completion verification 2

VERIFY IF OTHER DTCs DISPLAYED

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

•  Are any DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.