GM Service Manual Online
For 1990-2009 cars only

Step

Action

Values

Yes

No

Schematic Reference: Heated/Cooled Seat Schematics

Connector End View Reference: Power Seat Connector End Views

1

Did you review the Heated Seat System Description and Operation and perform the necessary inspections?

--

Go to Step 2

Go to Heated Seats Description and Operation

2

  1. Turn ON the ignition.
  2. Operate the heated seat switch in the 1, 2, and OFF switch positions.

Does the heated seat system operate normally?

--

Go to Testing for Intermittent Conditions and Poor Connections

Go to Step 3

3

Operate the heated seat switch to the OFF position.

Is the heated seat switch indicator illuminated?

--

Go to Step 6

Go to Step 4

4

  1. Disconnect the heated seat switch connector.
  2. Measure the voltage of the heated seat switch signal circuit of the connector.

Is the voltage at or near the specified value ?

12 V

Go to Step 5

Go to Step 7

5

Test the heated seat switch signal circuit for a short to voltage. Refer to Wiring Repairs .

Did you find and correct the condition?

--

Go to Step 10

Go to Step 6

6

Inspect for poor connections at the heated seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 10

Go to Step 8

7

Inspect for poor connections at the heated seat module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .

Did you find and correct the condition?

--

Go to Step 10

Go to Step 9

8

Replace the heated seat switch. Refer to Heated Seat Switch Replacement .

Did you complete the replacement?

--

Go to Step 10

--

9

Replace the heated seat module. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

--

Go to Step 10

--

10

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2