Diagnosis And Testing - Power Lumbar Switch
NOTE:
For complete circuit diagrams, Refer to Appropriate Wiring Information. Wiring Information includes wiring diagrams, connector pin-out and location views, details of wire harness routing and retention, splice and ground locations and proper wire and connector repair procedures.
- Disconnect and isolate the battery negative cable.
- Remove the power lumbar support switch from the seat. Refer to SWITCH, LUMBAR CONTROL, REMOVAL AND INSTALLATION .
- Use an ohmmeter to test the continuity of the power lumbar support switch in the following position shown in illustration, using the following table. If not OK, replace the inoperative power lumbar support switch. If switch tests OK, check for an open or short in the power lumbar support circuit wiring. If no open or short is found, replace the power lumbar support adjuster motor(s) as required.
DRIVER SEAT LUMBAR SWITCH CONTINUITY
| SWITCH POSITION | CONTINUITY BETWEEN |
|---|---|
| OFF | 1-2, 1-3, 1-4, 1-5, 2-3, 2-4, 2-5, 3-4, 3-5, 4-5 |
| LEFT (4) | 1-3, 1-4, 1-5, 2-6, 3-4, 3-5, 4-5 |
| RIGHT (2) | 1-2, 1-4, 1-5, 2-4, 2-5, 3-6, 4-5 |
| UP (1) | 1-2, 1-3, 1-4, 2-3, 2-4, 3-4, 5-6 |
| DOWN (3) | 1-6, 2-3, 2-4, 2-5, 3-4, 3-5, 4-5 |