REAR SEAT WARMER UNIT INSPECTION

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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

LH-side

Seat cushion side

1.  Switch the ignition to off.

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

3.  Disconnect the rear seat warmer unit (LH) connector.

4.  Inspect for continuity between the rear seat warmer unit (LH) connector terminal G and H.

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―  If not as specified, replace the rear seat cushion pad. (See REAR SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

5.  Measure the resistance between the rear seat warmer unit (LH) connector terminal E and D, 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 rear seat cushion pad. (See REAR SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

Seat back side

1.  Switch the ignition to off.

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

3.  Disconnect the rear seat warmer unit (LH) connector.

4.  Inspect for continuity between the rear seat warmer unit (LH) connector (short cord) terminal A and B.

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―  If not as specified, replace the rear seat back pad. (See REAR SEAT BACK TRIM REMOVAL/INSTALLATION.)

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RH-side

Seat cushion side

1.  Switch the ignition to off.

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

3.  Disconnect the rear seat warmer unit (RH) connector.

4.  Inspect for continuity between the rear seat warmer unit (RH) connector (short cord) terminal A and B.

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―  If not as specified, replace the rear seat cushion pad. (See REAR SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

5.  Measure the resistance between the rear seat warmer unit (RH) connector terminal C and D, 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 rear seat cushion pad. (See REAR SEAT CUSHION TRIM REMOVAL/INSTALLATION.)

Seat back side

1.  Switch the ignition to off.

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

3.  Disconnect the rear seat warmer unit (RH) connector.

4.  Inspect for continuity between the rear seat warmer unit (RH) connector (short cord) terminal A and B.

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―  If not as specified, replace the rear seat back pad. (See REAR SEAT BACK TRIM REMOVAL/INSTALLATION.)

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