Lumbar Support Inoperative
WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
Lumbar Support Inoperative
| Step | Action | Yes | No |
|---|---|---|---|
| Schematic Reference: Driver Seat Schematics or Passenger Seat Schematics Connector End View Reference: Power Seat Systems Connector End Views DEFINITION: One or more of the power lumbar functions are inoperative. |
|||
| 1 | Did you review the Lumbar Support System Description and Operation and perform the necessary inspections? | Go to Step 2 | Go to Symptoms - Seats |
| 2 | Verify that the Lumbar Support Inoperative complaint is present, by attempting to operate the lumbar support motors through their full range of adjustment. Does the lumbar support system operate as described in the system description and operation? |
Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
| 3 | Are both of the lumbar 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 positive voltage circuit of the switch connector to the ground circuit of the switch connector. Does the test lamp illuminate? |
Go to Step 9 | Go to Step 11 |
| 6 |
|
Go to Step 8 | Go to Step 7 |
| 7 | Test the motor control circuits for a short to ground or an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 9 |
| 8 | Inspect for poor connections at the harness connector of the inoperative lumbar motor. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 13 |
| 9 | Inspect for poor connections at the harness connector of the lumbar switch. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
Go to Step 14 | Go to Step 12 |
| 10 | Repair the open in the battery positive voltage circuit of the lumbar switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 11 | Repair the open in the ground circuit of the lumbar switch. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
Go to Step 14 | - |
| 12 | Replace the lumbar switch. Refer to Lumbar Switch Replacement . Did you complete the replacement? |
Go to Step 14 | - |
| 13 | Replace the lumbar motor Refer to Lumbar Replacement - Front Seat . Did you complete the replacement? |
Go to Step 14 | - |
| 14 | Operate the system in order to verify the repair. Did you correct the condition? |
System OK | Go to Step 2 |