FRONT SEAT WARMER UNIT INSPECTION

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Warning

•  Handling a side air bag improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings/cautions in the Workshop Manual before handling the front seat (side air bag integrated). (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.)

Caution

•  After removing a front seat, do not operate the slider lever. If the slider lever is operated, the left and right slide positions will deviate, and the slide adjuster may be damaged after the front seat is installed.

•  Verify that there are no malfunctions in the sliding mechanism after installing a front seat.

•  When performing the procedure with a front seat removed from the vehicle, perform the procedure on a clean rag so as not to damage or soil the seat.

Simple Inspection

1.  Place a cooling agent on the seat cushion (thermistor).

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2.  Operate the seat warmer switch to turn on the seat warmer.

3.  Touch the seat cushion and the seat back to verify a temperature increase.

4.  If a temperature increase cannot be verified, go to the resistance inspection. (See Resistance Inspection.)

Resistance Inspection

Driver-side

Seat cushion side

1.  Switch the ignition to off.

2.  Disconnect the negative battery terminal and wait 1 min. or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3.  Disconnect the driver-side seat warmer unit connector.

4.  Inspect for continuity between the driver-side seat warmer unit connector terminal 6A—6B.

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?  If not as specified, replace the front seat cushion pad. (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

5.  Measure the resistance between the front seat warmer unit connector terminal 6C—6D, and verify that the condition is as indicated in the table.

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•  If the thermistor characteristic is not as shown in the graph, replace the front seat cushion pad. (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

Seat back side

1.  Switch the ignition to off.

2.  Disconnect the negative battery terminal and wait 1 min. or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3.  Disconnect the driver-side seat warmer unit connector.

4.  Inspect for continuity between the driver-side seat warmer unit connector (short cord) terminal A—B.

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?  If not as specified, replace the front seat back pad. (See FRONT SEAT BACK TRIM REMOVAL/INSTALLATION.)

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Passenger-side

Seat cushion side

1.  Switch the ignition to off.

2.  Disconnect the negative battery terminal and wait 1 min. or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3.  Inspect for continuity between the passenger-side seat warmer control unit connector terminal N—B.

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?  If not as specified, replace the front seat cushion pad. (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

4.  Measure the resistance between the passenger-side seat warmer control unit connector terminal D—F, and verify that the condition is as indicated in the table.

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•  If the thermistor characteristic is not as shown in the graph, replace the front seat cushion pad. (See FRONT SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

Seat back side

1.  Switch the ignition to off.

2.  Disconnect the negative battery terminal and wait 1 min. or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION.)

3.  Inspect for continuity between the passenger-side seat warmer unit connector (short cord) terminal A—B.

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?  If not as specified, replace the front seat back pad. (See FRONT SEAT BACK TRIM REMOVAL/INSTALLATION.)

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