Troubleshooting Hints - Lumbar Seats

1. If none of the lumbar support functions operate, check the SEAT Circuit Breaker and the H SEAT/LUM Fuse.
2. To avoid misdiagnosis, inspect cables for binding which could prevent smooth operation or cause system failure.
3. Check that ground G301 is clean and tight.
^ Check for a broken (or partially broken) wire inside of the insulation which could cause 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).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (refer to General Troubleshooting Procedures). Diagnostic Aids
^ Refer to System Diagnosis.