Shift Interlock Systems: Diagnosis Chrysler Voyager IV

PRELIMINARY INSPECTION

Diagnosis of shift interlock system should begin with a general visual inspection of related components, i.e., shift linkage, electrical connections, components, etc.

SYMPTOM TESTS

Note. For additional information on scan tool operation, procedures and usage, see appropriate DIAGNOSIS article.

Diagnostic Procedure

1. Turn ignition switch to ON/RUN position. Using scan tool, record and erase Diagnostic Trouble Codes (DTC). Turn ignition switch to OFF, then LOCK position. Turn ignition switch to ON/RUN position. Using scan tool, read DTCs. If scan tool displays BRAKE SHIFT INTERLOCK OUTPUT OPEN, go to next step. If scan tool does not display BRAKE SHIFT INTERLOCK OUTPUT OPEN, go to step 8.
2. Turn ignition switch to OFF, then LOCK position. Disconnect BTSI solenoid harness connector. (Схема №1) Ensure connector terminals are free of corrosion or damage. Repair as necessary. Connect test light between battery voltage and brake shift interlock control circuit at terminal No. 1 on harness connector. See «WIRING DIAGRAMS»(ref-131134-S07836534612001121100000). If test light illuminates brightly, go to next step. If test light does not illuminate brightly, go to step 6.
3. Connect test light between ground and brake shift interlock feed circuit at terminal No. 2 on harness connector. If test light illuminates brightly, go to next step. If test light does not illuminate brightly, go to step 5.
4. Replace BTSI solenoid. See «BTSI SOLENOID»(ref-131134-S02466387632001121300000) under REMOVAL & INSTALLATION.
5. Turn ignition switch to OFF, then LOCK position. Disconnect FCM harness connector. FCM is connected to ICM. (Схема №2) Ensure connector terminals are free of corrosion or damage. Repair as necessary. Using DVOM, measure resistance of brake shift interlock feed circuit between terminal No. 27 on FCM harness connector (connector on IPM) and terminal No. 2 on BTSI harness connector. (Схема №6) If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open or high resistance in circuit.
6. Measure resistance of brake shift interlock control circuit between terminal No. 47 on FCM harness connector (connector on IPM) and terminal No. 1 on BTSI harness connector. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open or high resistance in circuit.
7. Replace FCM. See «FRONT CONTROL MODULE»(ref-131134-S11501496002001121300000) under REMOVAL & INSTALLATION.
8. System is currently functioning correctly. Symptom may be caused by intermittent condition. Check all applicable connectors. See «CONNECTOR IDENTIFICATION»(ref-131134-S04753652852001121400000) and «WIRING DIAGRAMS»(ref-131134-S07836534612001121100000). Wiggle wiring and check for loose or damaged connections. Repair as necessary and retest system. If no problems are found, repair is complete.