Lumbar Support Inoperative
Lumbar Support Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Lumbar Support Schematics
IMPORTANT:
This table assumes that the mechanical systems are clear and free of obstructions.
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| 1 | Did you review the Lumbar Support Description and Operation? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Operate the Lumbar/Bolster system. Does the system operate normally? |
Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS | Go to Step 3 |
| 3 | Are both the lumbar and the bolster motors inoperative? | Go to Step 4 | Go to Step 6 |
| 4 |
|
Go to Step 5 | Go to Step 10 |
| 5 | Connect a test lamp from the battery voltage supply circuit terminal to the ground circuit terminal in the lumbar/bolster switch harness connector. Does the test lamp illuminate? |
Go to Step 8 | Go to Step 11 |
| 6 |
|
Go to Step 9 | Go to Step 7 |
| 7 | Test the motor control circuits for an open or short to ground. Refer to CIRCUIT TESTING
and WIRING REPAIRS
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 8 |
| 8 | Inspect for poor connections at the lumbar/bolster switch connector. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and to CONNECTOR REPAIRS
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 9 | Inspect for poor connections at the motor connector. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
and to CONNECTOR REPAIRS
. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 10 | Repair the open or short to ground in the battery voltage supply circuit to the lumbar/bolster switch. Refer to WIRING REPAIRS
. Did you complete the repair? |
Go to Step 14 | - |
| 11 | Repair the open in the lumbar/bolster switch ground circuit. Refer to WIRING REPAIRS
. Did you complete the repair? |
Go to Step 14 | - |
| 12 | Replace the inoperative motor. Refer to Lumbar Replacement - Front Seat (Manual) or Lumbar Replacement - Front Seat (Power Lumbar/Bolster) . Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the inoperative lumbar/bolster switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? |
Go to Step 14 | - |
| 14 | Operate the system to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |