Using Volt/Ohmmeter

Fig. 5 Passive Seat Belt Module Connector Terminal Identification:

1. Inspect circuit breaker in cavity 11 and fuse in cavity 4 of fuse block.
2. Replace circuit breaker and/or fuse as required, then use voltmeter to check for battery voltage at pin 6 of Passive Seat Belt Module (PSBM) 10-way electrical connector.
3. If voltmeter indicates that less than 9 volts are present, inspect all harness connectors and repair as necessary, then recheck voltage.
4. If voltmeter indicates that 9 volts or more are present, check for ground at pin 1 of PSBM 10-way connector.
5. If ground is not indicated, inspect all harness connectors and repair as necessary, then check again for ground.
6. If ground is indicated, place ignition switch in On position, then use a voltmeter to check for battery voltage at pin 16 of PSBM 21-way connector.
7. If battery voltage is not present, proceed as follows:
a. On Acclaim, LeBaron Sedan and Spirit models, inspect fuse in cavity 8 of fuse block. Replace as necessary.
b. On Shadow and Sundance models, inspect fuse in cavity 4 of fuse block. Replace as necessary.

8. If battery voltage is present, check PSBM output voltage to seat belt motor as follows:
a. Disconnect PSBM 10-way connector from module; allow 21-way connector to remain connected.
b. Connect voltmeter leads between pins 5 and 10 of module 10-way connector. With ignition switch in On position, passenger door opening or closing and shoulder belt buckled to track and drive carrier, 7-12 volts should be indicated. There will only be a PSBM voltage output to seat belt motor immediately after door opens or closes and when carrier is not at either end of track. Voltage must be checked within 30 seconds of placing ignition switch in On position.

9. If PSBM output voltage is not as specified, inspect shoulder belt switch as follows:
a. Disconnect PSBM 21-way connector; then, using an ohmmeter, check for continuity from pin 15 to ground. No continuity should be indicated when shoulder belt is buckled to track and drive carrier, but continuity should exist when belt is fully coiled on retractor.
b. If results are not as specified, inspect harness connectors for opens and for proper connection; repair as necessary. If no opens or improper connections are found, replace shoulder belt retractor assembly.

10. If results of shoulder belt switch test are as specified, inspect door jamb switch as follows:
a. Check for continuity between pin 14 and ground. With passenger door closed, no continuity should exist; with door open, continuity should exist.
b. If results are not as specified, inspect harness connectors for opens and for proper connection; repair as necessary. If no opens or improper connections are found, replace door jamb switch.

11. If results of door jamb switch test are as specified, inspect A-pillar forward limit switch as follows:
a. Check for continuity between pin 5 and ground. With belt latch carrier at A-pillar position, no continuity should exist, but continuity should exist with carrier in any other position.
b. If results are not as specified, inspect harness connectors for opens and for proper connection; repair as necessary. If no opens or improper connections are found, replace track and drive assembly.

12. If results of forward limit switch test are as specified, inspect B-pillar reverse limit switch as follows:
a. Check for continuity between pin 7 and ground. With belt latch carrier at B-pillar position, no continuity should exist, but continuity should exist with carrier in any other position.
b. If results are not as specified, inspect harness connectors to ensure connections are good and check for opens between module, track and drive motor; repair as necessary. If no improper connections or opens are found, replace track and drive assembly.

13. Check PSBM output voltage at seat belt motor as follows:
a. Connect both module connectors (10-way and 21-way), then connect voltmeter leads between pins 1 and 3 of track and drive motor 6-way connector.
b. With ignition switch in On position, passenger door opening or closing and shoulder belt buckled to track and drive carrier, 7-12 volts should be indicated. There will only be a PSBM voltage output to seat belt motor immediately after door opens or closes and when carrier is not at either end of track. Voltage must be checked within 30 seconds of placing ignition switch in On position.

14. If PSBM output voltage test results are not as specified, inspect harness connectors for opens and for improper connections; repair as necessary. If results are as specified, replace track and drive assembly.