SECOND-ROW 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 (6:4 Split Adjustable-Type Bench Type).) (See Resistance Inspection (Captain Seat Type) (R.H.D.).) (See Resistance Inspection (Captain Seat Type) (L.H.D.).)


Resistance Inspection (6:4 Split Adjustable-Type Bench Type)


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 second-row seat warmer unit (LH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (LH) connector terminal F (R.H.D.)/ I (L.H.D.) and E (R.H.D.)/ L (L.H.D.).
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―  If not as specified, replace the second-row seat cushion pad. (See SECOND-ROW SEAT CUSHION TRIM REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (LH) connector terminal L (R.H.D.)/ F (L.H.D.) and H, 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 second-row seat cushion pad. (See SECOND-ROW 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 second-row seat warmer unit (LH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (LH) connector (short cord) terminal A and B.
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―  If not as specified, replace the second-row seat back pad. (See SECOND-ROW SEAT BACK TRIM REMOVAL/INSTALLATION.)


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 second-row seat warmer unit (RH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (RH) connector terminal E (R.H.D.)/ F (L.H.D.) and L (R.H.D.)/ E (L.H.D.).
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―  If not as specified, replace the second-row seat cushion pad. (See SECOND-ROW SEAT CUSHION TRIM REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (RH) connector terminal B (R.H.D.)/ L (L.H.D.) and D (R.H.D.)/ H (L.H.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 second-row seat cushion pad. (See SECOND-ROW 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 second-row seat warmer unit (RH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (RH) connector (short cord) terminal A and B.
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―  If not as specified, replace the second-row seat back pad. (See SECOND-ROW SEAT BACK TRIM REMOVAL/INSTALLATION.)


Resistance Inspection (Captain Seat Type) (R.H.D.)


LH-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 second-row seat warmer unit (LH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (LH) connector terminal A and O.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (LH) connector terminal L and K , 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 second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)


RH-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 second-row seat warmer unit (RH) connector.
4.  Inspect for continuity between the second-row seat warmer unit (RH) connector terminal N and B.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (RH) connector terminal M 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 second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)


Resistance Inspection (Captain Seat Type) (L.H.D.)


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 second-row seat warmer unit (LH) (seat cushion side) connector.
4.  Inspect for continuity between the second-row seat warmer unit (LH) (seat cushion side) connector terminal B and D.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (LH) (seat cushion side) connector terminal A and C , 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 second-row seat. (See SECOND-ROW SEAT 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 second-row seat warmer unit (LH) (seat back side) connector.
4.  Inspect for continuity between the second-row seat warmer unit (LH) (seat back side) connector terminal A and B.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)


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 second-row seat warmer unit (RH) (seat cushion side) connector.
4.  Inspect for continuity between the second-row seat warmer unit (RH) (seat cushion side) connector terminal B and D.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)
5.  Measure the resistance between the second-row seat warmer unit (RH) connector terminal A and C, 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 second-row seat. (See SECOND-ROW SEAT 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 second-row seat warmer unit (RH) (seat back side) connector.
4.  Inspect for continuity between the second-row seat warmer unit (RH) (seat back side) connector terminal A and B.
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―  If not as specified, replace the second-row seat. (See SECOND-ROW SEAT REMOVAL/INSTALLATION.)