Step
| Action
| Value(s)
| Yes
| No
|
1
| Did you perform the
Power Seats System Check?
| --
| Go
to
Step 2
| Go to
Lumbar Support System Check
|
2
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminal C and ground.
Does the test lamp light?
| --
| Go to
Step 3
| Go to
Step 11
|
3
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminal A and ground.
- Set and hold the driver seat lumbar adjuster switch to the UP
position.
Does the test lamp light?
| --
| Go to
Step 4
| Go to
Step 12
|
4
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminal F and ground.
- Set and hold the driver seat lumbar adjuster switch to the DOWN
position.
Does the test lamp light?
| --
| Go to
Step 5
| Go to
Step 15
|
5
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminal B and ground.
- Set and hold the driver seat lumbar adjuster switch to the UP
position.
Does the test lamp light?
| --
| Go to
Step 6
| Go to
Step 17
|
6
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminal E and ground.
- Set and hold the driver seat lumbar adjuster switch to the DOWN
position.
Does the test lamp light?
| --
| Go to
Step 7
| Go to
Step 17
|
7
|
- Connect a test lamp.
- Backprobe between the up/down lumbar adjuster relay connector
terminals C and D.
Does the test lamp light?
| --
| Go to
Step 8
| Go to
Step 18
|
8
| Inspect for a poor connection or open in CKTs 767 or 768.
Did you find a poor connection or open in CKTs 767 or 768?
| --
| Go to
Step 9
| Go to
Step 10
|
9
|
- Repair the poor connection or open in CKTs 767 or 768.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
10
|
- Replace the up/down lumbar adjuster relay.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
11
|
- Repair the poor connection or open in CKT 340 between S331
and the up/down lumbar adjuster relay connector terminal C.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
12
| Inspect for a poor connection or open in CKT 387.
Did you find a poor connection or open in CKT 387?
| --
| Go to
Step 13
| Go to
Step 14
|
13
|
- Repair the poor connection or open in CKT 387.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
14
|
- Replace the driver seat lumbar adjuster switch.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
15
| Inspect for a poor connection or open in CKT 386.
Did you find a poor connection or open in CKT 386?
| --
| Go to
Step 16
| Go to
Step 14
|
16
|
- Repair the poor connection or open in CKT 386.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
17
|
- Replace the up/down lumbar support motor. Refer to
Front Seat Lumbar Support Replacement
.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
18
|
- Repair the poor connection or open in CKT 750 between S330
and the up/down lumbar adjuster relay.
- Inspect the system.
Is the repair complete?
| --
| Go to
Lumbar Support System Check
| --
|
