Troubleshooting Hints - Ultima

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
1. If both Passenger and Driver Seat Functions (Lumbar and Lateral) are inoperative, check DEFOG/SEATS Circuit Breaker 12 for open. - Check that G305 is clean and tight. - Check for poor connections at C300. - Check for poor connections at C310 terminals "A" and "B."
2. If Passenger Seat is inoperative and Driver's Seat operates normally, check for poor connections at C300 and C305, and for open in Seat Jumper Harness.
^ 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 "Troubleshooting Procedures"). Diagnostic Aids
^ Refer to System Diagnosis.