Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Lumbar Support Schematics Important: This table assumes that the mechanical systems are clear and free of obstructions. | ||||
1 | Did you review the Power Lumbar Circuit Description ? | -- | Go to Step 2 | Go to Symptoms |
2 | Verify the fault is present. Does the system operate normally? | -- | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
3 | Are both the lumbar and the bolster inoperative? | -- | Go to Step 4 | Go to Step 6 |
4 |
Does the test lamp illuminate? | -- | Go to Step 5 | Go to Step 8 |
5 | Test the ground circuit of the lumber/bolster switch for an open. Did you find an open? | -- | Go to Step 9 | Go to Step 6 |
6 |
Does the lumbar/bolster motor operate in both directions? | -- | Go to Step 7 | Go to Step 10 |
7 | Replace the inoperative lumbar/bolster switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
8 |
Did you find and correct the condition? | -- | Go to Step 11 | -- |
9 | Repair the open in the ground circuit between the seat switch and ground. Refer to Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 11 | -- |
10 | Replace the inoperative lumbar/bolster motor and wiring harness. Refer to Front Seat Lumbar Support Replacement . Did you complete the replacement? | -- | Go to Step 11 | -- |
11 | Operate the system to verify the repair. Did you correct the condition? | -- | System OK | Go to Step 3 |
