Troubleshooting Hints - Ultima

Procedure

Note: 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 failure but prove "GOOD" in a continuity/voltage check. Use Test Light J 34142 whenever possible. Test lights require more current than a high impedance DVM and are more useful for detecting abnormally high resistive circuits. Some test lights have high impedances and will not be as useful in detecting resistive circuits.
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems