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Home >> Chrysler >> 2002 >> Voyager EC >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Shift Interlock Systems >> Symptom Tests >> Brake Shift Interlock Output Open >> Diagnostic Procedure
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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. NOTE: Ensure test light illuminates with same brightness during test as if it were connected directly to vehicle's battery.
  2. Turn ignition switch to OFF, then LOCK position. Disconnect BTSI solenoid harness connector. See Figure . 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  . 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  under REMOVAL & INSTALLATION.
  5. Turn ignition switch to OFF, then LOCK position. Disconnect FCM harness connector. FCM is connected to ICM. See Figure . 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. See Figure . 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  under REMOVAL & INSTALLATION.
  8. System is currently functioning correctly. Symptom may be caused by intermittent condition. Check all applicable connectors. See CONNECTOR IDENTIFICATION  and WIRING DIAGRAMS  . Wiggle wiring and check for loose or damaged connections. Repair as necessary and retest system. If no problems are found, repair is complete.
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