Step
| Action
| Value(s)
| Yes
| No
|
1
| Inspect the
SEAT circuit breaker.
Is the SEAT circuit breaker open?
| --
| Go to
Step 2
| Go to
Step 3
|
2
|
- Repair a short to ground in CKT 340.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 3
| System OK
|
3
| Inspect the H SEAT/LUM fuse.
Is the H SEAT/LUM fuse open?
| --
| Go to
Step 4
| Go to
Step 5
|
4
|
- Repair a short to ground in CKT 2040.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 5
| System OK
|
5
|
- Connect a test lamp.
- Backprobe between the driver seat lumbar adjuster switch connector
terminal E and ground.
Does the test lamp light?
| --
| Go to
Step 6
| Go to
Step 8
|
6
|
- Connect a test lamp.
- Backprobe between the driver seat lumbar adjuster switch connector
terminal C and ground.
Does the test lamp light?
| --
| Go to
Step 7
| Go to
Step 9
|
7
|
- Connect a test lamp.
- Backprobe between the driver seat lumbar adjuster switch connector
terminals A and D.
Does the test lamp light?
| --
| Go to
Step 11
| Go to
Step 10
|
8
|
- Repair the poor connection or open in CKT 2040.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 9
| System OK
|
9
|
- Repair the poor connection or open in CKT 340 between C311
terminal A and S331.
- Inspect the system.
Is the symptom still present?
| --
| Go to
Step 10
| System OK
|
10
|
- Repair the poor connection or the open in CKT 750 between
S330 and G301.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
11
|
- Replace the driver seat lumbar adjuster switch. Refer to
Front Seat Lumbar Support Replacement
.
- Inspect the system.
Is the symptom still present?
| --
| --
| System OK
|
