Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Driver Seat Schematics Connector End View Reference: Power Seat Connector End Views DEFINITION: One or more of the power lumbar functions are inoperative. | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
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 | Go to Step 3 |
3 | Are both of the lumbar motors inoperative? | Go to Step 4 | Go to Step 6 |
4 |
Does the test lamp illuminate? | 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 |
Does the test lamp illuminate in both directions? | 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 . 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 . 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 . Did you find and correct the condition? | Go to Step 14 | Go to Step 12 |
10 | Repair the short to ground, poor connection, or an open in the battery positive voltage circuit of the lumbar switch. Refer to Wiring Repairs . 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 . 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 Front Seat Lumbar Support Replacement . 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 |
