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 both driver and passenger Lumbar Supports are inoperative, CHECK Circuit 640 between Splice S256 or S300 and Fuse Block and/or ground Circuit 150 between Splice S259 and Ground G200.
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 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 "Troubleshooting Procedures"). Diagnostic Aids