Forester F4-2.5L Turbo (2009)
Seat Heater: Testing and Inspection
Seat Heater System
INSPECTION
1. WIRING DIAGRAM
<Ref. to WI-96, WIRING DIAGRAM, Seat Heater System.>
2. DIAGNOSIS CHART
3. CHECK SEAT HEATER FUSE
Remove the seat heater fuse and inspect visually.
Is the fuse blown out?
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Yes -> Replace the fuse.
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No -> Check the power supply and ground circuit.
4. CHECK POWER SUPPLY AND GROUND CIRCUIT
1. CHECK POWER SUPPLY CIRCUIT
1. Disconnect the seat heater switch.
2. Turn the ignition switch to ON.
3. Measure the voltage between harness connector terminal and chassis ground.
Connector & terminal
(AD8) No. 12 (+) - Chassis ground (-):
Is the voltage 12 V or more?
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Yes -> Go to step 2.
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No -> Check the harness between the seat heater switch and fuse.
2. CHECK GROUND CIRCUIT
Measure the resistance between harness connector terminal and chassis ground.
Connector & terminal (AD8) No.2 - Chassis ground:
Is the resistance less than 10 ohms?
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Yes -> Go to step 3.
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No -> Repair the harness.
3. CHECK GROUND CIRCUIT
Measure the resistance between harness connector terminals.
Connector & terminal
(AD8) No. 1 - (AD8) No. 2:
(AD8) No. 3 - (AD8) No. 2:
Is the resistance less than 10 ohms?