Toyota 4Runner: Inspection

Toyota 4Runner Service Manual / Vehicle Interior / Seat / Seat Heater Switch / Inspection

INSPECTION

PROCEDURE

1. INSPECT SEAT HEATER SWITCH LH

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
3 (SW) - 7 (RV)	Switch off	2.7 to 4.1 kΩ
	Switch on (Min.)	2.7 to 4.1 kΩ
	Switch on (Max.)	0.28 to 0.42 kΩ

HINT:

As the dial is being turned, the resistance changes gradually.

If the result is not as specified, replace the seat heater switch.

Text in Illustration

*a	Component without harness connected (Seat Heater Switch)

(b) Apply battery voltage to the switch connector, and check that the seat heater switch illuminates.

OK:

Measurement Condition	Specified Condition
Battery positive (+) → 8 (ILL+) Battery negative (-) → 2 (ILL-)	Illuminates

Measurement Condition

Specified Condition

Battery positive (+) → 8 (ILL+)

Battery negative (-) → 2 (ILL-)

Illuminates

If the result is not as specified, replace the seat heater switch.

OK:

Measurement Condition	Switch Condition	Specified Condition
Battery positive (+) → 9 (IG) Battery negative (-) → 4 (E)	Switch on	Indicator illuminates

Measurement Condition

Switch Condition

Specified Condition

Battery positive (+) → 9 (IG)

Battery negative (-) → 4 (E)

Switch on

Indicator illuminates

If the result is not as specified, replace the seat heater switch.

2. INSPECT SEAT HEATER SWITCH RH

(a) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Switch Condition	Specified Condition
2 (SW) - 5 (RV)	Switch off	2.7 to 4.1 kΩ
	Switch on (Min.)	2.7 to 4.1 kΩ
	Switch on (Max.)	0.28 to 0.42 kΩ

HINT:

As the dial is being turned, the resistance changes gradually.

If the result is not as specified, replace the seat heater switch.

Text in Illustration

*a	Component without harness connected (Seat Heater Switch)

(b) Apply battery voltage to the switch connector, and check that the seat heater switch illuminates.

OK:

Measurement Condition	Specified Condition
Battery positive (+) → 6 (ILL+) Battery negative (-) → 1 (ILL-)	Illuminates

Measurement Condition

Specified Condition

Battery positive (+) → 6 (ILL+)

Battery negative (-) → 1 (ILL-)

Illuminates

If the result is not as specified, replace the seat heater switch.

OK:

Measurement Condition	Switch Condition	Specified Condition
Battery positive (+) → 7 (IG) Battery negative (-) → 3 (E)	Switch on	Indicator illuminates

Measurement Condition

Switch Condition

Specified Condition

Battery positive (+) → 7 (IG)

Battery negative (-) → 3 (E)

Switch on

Indicator illuminates

If the result is not as specified, replace the seat heater switch.

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