Troubleshooting Hints - Lumbar Seats

1. CHECK condition of CIG LTR Fuse. If fuse is open, LOCATE and REPAIR source of overload. REPLACE fuse.
2. If lumbar supports are inoperative, CHECK ORN (540) or ORN (640) between Splice S256, S255, or S300 and IP Fuse Block or BLK (150) between Splice S259 and Ground G202.
3. If one Seat Lumbar Support is inoperative, CHECK for:
- pinched or punctured bladder tubing
- punctured bladder
- evidence of motor overheating, pinched or broken wires
- REPLACE or REPAIR as necessary
^ CHECK for a broken (or partially broken) wire inside of the insulation which could cause system malfunction 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).
^ CHECK for proper installation of aftermarket electronic equipment which may affect the integrity of other systems. Refer to "General Troubleshooting Procedures". Diagnostic Aids