Did you perform the Heated Seats System Check?

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Go to Step 2

Go to Heated Seats System Check

1. Disconnect the appropriate heated seat control module connector C1.
2. Connect a J 39200 digital multimeter (DMM) from the heated seat module connector C1 cavity B (ORN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 3

Go to Step 17

1. Turn the ignition switch to the RUN position.
2. Connect a DMM from the appropriate heated seat module connector C1 cavity A (BRN) to ground.

Is the voltage within the specified range?

10-15 V

Go to Step 4

Go to Step 18

1. Turn the ignition switch to the OFF position.
2. Connect a DMM from the appropriate heated seat module connector C1 cavity E (BLK) to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 5

Go to Step 19

Connect a DMM from the appropriate heated seat module connector C1 cavity B (ORN) to cavity H (YEL).

Is the voltage within the specified range?

10-15 V

Go to Step 26

Go to Step 6

1. Press the appropriate heated seat switch.
2. Connect a DMM from the appropriate heated seat module connector C1 cavity to ground:

•	Left: cavity C (PNK)

•	Right: cavity C (PNK/BLK)

Is the resistance less than the specified value?

5 ohms

Go to Step 10

Go to Step 7

Test the appropriate circuit for an open:

Refer to Testing for Continuity in Wiring Systems.

Is there an open in the circuit?

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Go to Step 28

Go to Step 8

Test CKT 450 (BLK) for an open between the appropriate heated seat switch and S217. Refer to Testing for Continuity in Wiring Systems.

Is there an open in CKT 450?

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Go to Step 28

Go to Step 9

Replace the suspect heated seat switch.

Is the heated seat switch replacement complete?

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Go to Step 28

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1. Disconnect the appropriate heated seat control module connector C2.
2. Disconnect the appropriate heated seat control module connector C3.
3. Connect a DMM from the heated seat module connector C2 cavity A to cavity B.

Is the resistance less than the specified value?

10 ohms

Go to Step 11

Go to Step 20

Connect a DMM from the appropriate heated seat module connector C2 cavity A to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 21

Go to Step 12

Important: The thermistor resistance varies according to the temperature. Therefore, if you measure the resistance while the seat is still warm, the resistance may vary outside of the specified range.

With the seat at room temperature, connect a DMM from the appropriate heated seat module connector C2 cavity C to cavity D.

Is the resistance within the specified range?

850-1150 ohms

Go to Step 13

Go to Step 20

Connect a DMM from the appropriate heated seat module connector C2 cavity C to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 21

Go to Step 14

Connect a DMM from the appropriate heated seat module connector C3 cavity A to cavity B.

Is the resistance less than the specified value?

10 ohms

Go to Step 15

Go to Step 22

Connect a DMM from the appropriate heated seat module connector C3 cavity A to ground.

Is the resistance less than the specified value?

5 ohms

Go to Step 23

Go to Step 16

Replace the suspect heated seat module. Refer to Heater Module Replacement .

Is the heated seat module replacement complete?

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Go to Step 29

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Repair the open in the appropriate circuit between the rear junction block and the heated seat module:

Is the repair complete?

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Go to Step 29

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Repair the open in CKT 241 (BRN) between the rear junction block and the heated seat module. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 29

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Repair the open in CKT 450 (BLK) between the heated seat module and the appropriate splice:

Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 29

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Test the appropriate seat cushion heating element wiring for an open. Refer to Testing for Short to Ground in Wiring Systems.

Is there an open in the seat cushion heating element?

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Go to Step 28

Go to Step 24

Test the appropriate seat cushion element wiring for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in the seat cushion heating element?

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Go to Step 28

Go to Step 24

Test the appropriate seat back heating element for an open. Refer to Testing for Continuity in Wiring Systems.

Is there an open in the seat back heating element?

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Go to Step 28

Go to Step 25

Test the appropriate seat back heating element wiring for a short to ground. Refer to Testing for Continuity in Wiring Systems.

Is there a short to ground in the seat back heating element wiring?

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Go to Step 28

Go to Step 25

Replace the suspect seat cushion heating element. Refer to Front Seat Heater Element Replacement .

Is the seat cushion heating element replacement complete?

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Go to Step 29

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Replace the suspect seat back heating element. Refer to Front Seat Heater Element Replacement .

Is the seat back heating element replacement complete?

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Go to Step 29

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Test CKT 182 (YEL) for a short to ground. Refer to Testing for Short to Ground in Wiring Systems.

Is there a short to ground in CKT 182?

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Go to Step 28

Go to Step 27

Replace the body control module (SBM). Refer to Body Control Module Replacement in Body Control System.

Is the SBM replacement complete?

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Go to Step 29

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Repair the faulty wiring. Refer to Wiring Repairs in Wiring Systems.

Is the repair complete?

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Go to Step 29

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Perform the Heated Seats System Check. Refer to Heated Seats System Check .

Was the Heated Seats System Check performed?

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Go to Heated Seats System Check

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