Testing Instructions

The Rotunda Passive Restraint System Tester 007-0034A or equivalent can be used as an aid for performing pinpoint tests or a complete electrical system check. It has numbered jacks for each belt module pin, providing ease in connecting a volt ohm meter to perform harness checks.

Instructions for using the tester are as follows:
1. Temporarily remove passive restraint belt module.
2. Connect tester to passive restraint module harness connector.
3. Select System A.
4. Switch power ON.
5. Test components per the diagnostic procedures.
6. Disconnect tester and reinstall belt module.





When servicing a motorized passive restraint system for a stripped/kinked drive belt, the exact cause(s) of this condition must be identified and corrected or the new replacement drive belt will again be damaged.

If the A-pillar or B-pillar limit switch does not interrupt the input to the passive restraint control module when the belt is at the end of its travel at the A-pillar or the B-pillar, voltage continues to be supplied to the motor. This is known as a "stall condition," which will eventually result in damage to the drive belt.

After voltage has been supplied for approximately 15 seconds, the timer circuit in the module will interrupt the voltage to the motor.

The exact cause(s) of stripped/kinked drive belts can be electrical and/or mechanical.

NOTE:

- In most cases, it is not necessary to replace the complete track assembly when servicing the vehicle for a stripped/kinked drive belt. Replace only the drive belt and any other affected part.

- If the drive belt is stripped/kinked approximately 10 inches from the end of the belt, check A-pillar limit switch or check for a grounded A-pillar limit switch wire between the switch and the control module.

- While the shoulder belt carrier is traveling, the contacts in both limit switches are closed. When the carrier contacts a limit switch sufficiently to depress the plunger, which opens the switch contacts, voltage to the motor should be interrupted.

CAUSE
The A-pillar or B-pillar limit switch may be inoperative or the switch may be dislodged from its retainer.

ACTION
After installing the new drive belt into the shoulder belt track assembly, prior to installing the track in the vehicle, perform the Limit Switch Continuity Test on both the A-pillar and the B-pillar limit switches. Limit Switch Continuity Test Procedure