GM Service Manual Online
For 1990-2009 cars only

Power Seat Inoperative w/o A45

Step

Action

Value(s)

Yes

No

1

Did you review the power seat system operation and perform the necessary inspection?

--

Go to Step 2

Go to Symptoms

2

Does the other power seat operate properly?

--

Go to Step 4

Go to Step 3

3

Check the rear fuse block PWR SEAT circuit breaker for continuity.

Is the PWR SEAT circuit breaker OK?

--

Go to Step 7

Go to Step 8

4

Measure the voltage from the battery positive voltage (B+) circuit of the power seat switch harness connector to a good ground.

Does the voltage measure within the specified range?

9-16 V

Go to Step 5

Go to Step 9

5

Measure the voltage from the battery positive voltage (B+) circuit of the power seat switch to the ground circuit of the seat switch.

Does the voltage measure within the specified range?

9-16 V

Go to Step 6

Go to Step 10

6

Inspect for poor connections at the harness connector of the power seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 13

7

Inspect for poor connections at the harness connector of the rear fuse block. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 14

Go to Step 12

8

Repair the short to ground in the battery positive voltage circuit of the power seat switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 11

--

9

Repair the open in the battery positive voltage circuit of the power seat switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 14

--

10

Repair the open in the ground circuit of the power seat switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 14

--

11

Replace the PWR SEAT circuit breaker in the rear fuse block. Refer to Wiring Repairs in Wiring Systems.

Did you complete the replacement?

--

Go to Step 14

--

12

Replace the rear fuse block. Refer to Relay/Fuse Center Replacement in Wiring Systems.

Did you complete the replacement?

--

Go to Step 14

--

13

Replace the power seat switch. Refer to Power Seat Switch Replacement .

Did you complete the replacement?

--

Go to Step 14

--

14

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2

Power Seat Inoperative w/A45

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check - Power Seat Systems?

--

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2

Test the rear fuse block PWR SEAT circuit breaker for continuity.

Does the PWR SEAT Circuit Breaker test OK?

--

Go to Step 3

Go to Step 10

3

Test the rear fuse block MEM Fuse.

Does the MEM Fuse test OK?

--

Go to Step 4

Go to Step 10

4

Measure the voltage from the battery positive voltage (B+) circuit of the memory seat module connector to a good ground.

Does the voltage measure within the specified range?

9-16 V

Go to Step 5

Go to Step 11

5

Measure the voltage between the battery positive voltage (B+) circuit of the memory seat module and the ground circuit of the memory seat module.

Does the voltage measure within the specified range?

9-16 V

Go to Step 6

Go to Step 12

6

Measure the voltage from the battery positive voltage (B+) circuit of the power seat switch connector to a good ground.

Does the voltage measure within the specified range?

9-16 V

Go to Step 7

Go to Step 13

7

Does the seat move when a memory recall or easy exit function is performed?

--

Go to Step 8

Go to Step 9

8

Inspect for poor connections at the harness connector of the power seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 15

9

Inspect for poor connections at the harness connector of the power seat switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.

Did you find and correct the condition?

--

Go to Step 17

Go to Step 16

10

Repair the short to ground in the appropriate battery positive voltage circuit of the power seat switch or the memory seat module (MSM). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 14

--

11

Repair the open in the battery positive voltage (B+) circuit of the memory seat module (MSM). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 17

--

12

Repair the open in the ground circuit of the memory seat module (MSM). Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 17

--

13

Repair the open in the battery positive voltage (B+) circuit of the power seat switch. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 17

--

14

Replace the PWR SEAT circuit breaker or the MEM fuse. Refer to Wiring Repairs in Wiring Systems.

Did you complete the replacement?

--

Go to Step 17

--

15

Replace the power seat switch. Refer to Power Seat Switch Replacement .

Did you complete the replacement?

--

Go to Step 17

--

16

Replace the memory seat module (MSM). Refer to Memory Seat Control Module Replacement .

Did you complete the replacement?

--

Go to Step 17

--

17

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2