Troubleshooting Hints - Lumbar Seats

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. Check the rear junction block PWR SEAT circuit breaker for continuity. If open, check for a short to ground in CKT 1340 (ORN).
2. Check the rear junction block MEM/RFA Fuse by visual inspection. If open, check for a short to ground in CKT 2040 (ORN).
3. Make sure that ground G2O1 is clean and tight.
4. If a lumbar motor's internal circuit breaker trips, it will not reset until voltage is removed from the motor.
5. For Power Seats, refer to Power Seats. Testing and Inspection
6. For Power Seat: Memory (A43), refer to Power Seat: Memory. This is the information for the memory seat not related to the lumbar. Testing and Inspection
7. Before component replacement, check for poor connections at related component and in-line harness connector terminal connections.
8. Check for broken (or partially broken) wire inside of the insulation which could cause a system malfunction but prove good in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
9. Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.