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 operation and perform the necessary inspections?

--

Go to Step 2

Go to Symptoms

2

Does the other power seat operate properly?

--

Go to Step 8

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 4

Go to Step 6

4

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 5

5

Replace the rear fuse block. Refer to Rear Electrical Center or Junction Block Replacement .

Did you complete the replacement?

--

Go to Step 14

--

6

Repair the short to ground in the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 7

--

7

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

--

8

Measure the battery positive voltage circuit of the power seat switch to a good ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 9

Go to Step 12

9

Measure the battery positive voltage of the power seat switch to the ground circuit of the power seat switch.

Does the voltage measure within the specified range?

10-15 V

Go to Step 10

Go to Step 13

10

Inspect for poor connections at the harness connector of the 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 11

11

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

Did you complete the replacement?

--

Go to Step 14

--

12

Repair the battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 14

--

13

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

Did you complete the repair?

--

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 the Diagnostic System Check-Power Seat Systems?

--

Go to Step 2

Go to Diagnostic System Check - Power Seat Systems

2

Test the circuit breaker.

Does the circuit breaker test OK?

--

Go to Step 3

Go to Step 4

3

Test the Fuse.

Does the Fuse test OK?

--

Go to Step 6

Go to Step 4

4

Repair the short to ground in the appropriate battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 5

--

5

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

Did you complete the replacement?

--

Go to Step 16

--

6

Measure the battery positive voltage circuit feeds of the memory seat module to a good ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 7

Go to Step 15

7

Measure the voltage between the battery positive voltage circuit feeds and the memory seat module ground circuit.

Does the voltage measure within the specified range?

10-15 V

Go to Step 8

Go to Step 14

8

Measure the battery positive voltage circuit feed of the LH seat switch to a good ground.

Does the voltage measure within the specified range?

10-15 V

Go to Step 9

Go to Step 15

9

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

--

Go to Step 10

Go to Step 12

10

Inspect for poor connections at the harness connector of the LH 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 16

Go to Step 11

11

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

Did you complete the replacement?

--

Go to Step 16

--

12

Inspect for poor connections at the harness connector of the memory seat module (MSM). 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 16

Go to Step 13

13

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

Did you complete the replacement?

--

Go to Step 16

--

14

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

Did you complete the repair?

--

Go to Step 16

--

15

Repair the open in the appropriate battery positive voltage circuit. Refer to Wiring Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 16

--

16

Operate the system in order to verify the repair.

Did you correct the condition?

--

System OK

Go to Step 2