For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Does the front height adjustment operate properly? | -- | Go to Step 6 | Go to Step 2
2 | Does the rear height adjustment operate properly? | -- | Go to Step 16 | Go to Step 3
3 | Inspect for a poor connection at the affected seat adjuster switch connector or the seat adjuster motor assembly connector. Is there a poor connection at the affected seat adjuster switch connector or the seat adjuster motor assembly connector? | -- | Go to Step 4 | Go to Step 5
4 | Repair the poor connection at the affected seat adjuster switch connector or the seat adjuster motor assembly connector. Has the repair been made and the system rechecked? | -- | Go to Symptoms - Seats | --
5 | Replace the affected seat adjuster switch. Refer to Power Seat Switch Replacement . Has the repair been made and the system rechecked? | -- | Go to Symptoms - Seats | --
6 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C1 terminal A and ground.
2. Set and hold the rear height adjuster switch to down for the affected seat.

Is the test light on?

--

Go to Step 7

Go to Step 12

7 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C2 terminal B and ground.
2. Set and hold the rear height adjuster switch to up for the affected seat.

Is the test light on?

--

Go to Step 8

Go to Step 14

8 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C2 terminal A and terminal B.
2. While observing the test light, perform the following:

• | Set and hold the rear height adjuster switch to up and then release for the affected seat.

• | Set and hold the rear height adjuster switch to down and then release for the affected seat.

Does the test light illuminate in both directions?

--

Go to Step 9

Go to Step 5

9 | Inspect for a poor connection at the affected seat adjuster motor assembly connector C2 terminal A or terminal B. Is there a poor connection at the affected seat adjuster motor assembly connector C2 terminal A or terminal B? | -- | Go to Step 10 | Go to Step 11
10 | Repair the poor connection at the affected seat adjuster motor assembly connector C2 terminal A or terminal B. Has the repair been made and the system rechecked? | -- | Go to Symptoms - Seats | --
11 | Replace the affected seat adjuster motor assembly. Refer to Power Seat Adjuster Mechanism Replacement . Has the repair been made and the system rechecked? | -- | Go to Symptoms - Seats | --
12 | Inspect for the following conditions in CKT 282.

• | a poor connection

• | an open

Is there a poor connection or an open in circuit 282?

--

Go to Step 13

Go to Step 5

13 | Repair the following condition in CKT 282.

• | a poor connection

• | an open

Has the repair been made and the system rechecked?

--

Go to Symptoms - Seats

--

14 | Inspect for the following conditions in CKT 283.

• | a poor connection

• | an open

Is there a poor connection or an open in circuit 283?

--

Go to Step 15

Go to Step 5

15 | Repair the following condition in CKT 283.

• | a poor connection

• | an open

Has the repair been made and the system rechecked?

--

Go to Symptoms - Seats

--

16 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C3 terminal A and ground.
2. Set and hold the rear height adjuster switch to down for the affected seat.

Is the test light on?

--

Go to Step 17

Go to Step 21

17 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C3 terminal B and ground.
2. Set and hold the rear height adjuster switch to up for the affected seat.

Is the test light on?

--

Go to Step 18

Go to Step 23

18 |

1. Using a test light, backprobe between the affected seat adjuster motor assembly connector C3 terminal A and terminal B.
2. While observing the test light, perform the following:

• | Set and hold the rear height adjuster switch to up and then release for the affected seat.

• | Set and hold the rear height adjuster switch to down and then release for the affected seat.

Does the test light illuminate in both directions?

--

Go to Step 19

Go to Step 5

19 | Inspect for a poor connection at the affected seat adjuster motor assembly connector C3 terminal A or terminal B. Is there a poor connection at the affected seat adjuster motor assembly connector C3 terminal A or terminal B? | -- | Go to Step 20 | Go to Step 11
20 | Repair the poor connection at the affected seat adjuster motor assembly connector C3 terminal A or terminal B. Has the repair been made and the system rechecked? | -- | Go to Symptoms - Seats | --
21 | Inspect for the following conditions in CKT 287.

• | a poor connection

• | an open

Is there a poor connection or an open in circuit 287?

--

Go to Step 22

Go to Step 5

22 | Repair the following condition in CKT 287.

• | a poor connection

• | an open

Has the repair been made and the system rechecked?

--

Go to Symptoms - Seats

--

23 | Inspect for the following conditions in CKT 286.

• | a poor connection

• | an open

Is there a poor connection or an open in CKT 286?

--

Go to Step 24

Go to Step 5

24 | Repair the following condition in CKT 286.

• | a poor connection

• | an open

Has the repair been made and the system rechecked?

--

Go to Symptoms - Seats

--