Switching Module Test - 5000CS Turbo
- Check Blue wire from terminal No. 1 of ignition coil to switching module for any damage or corrosion. Repair if necessary. Using a jumper wire, connect coil tower wire to ground.
- Unplug connector from switching module (next to ignition coil). Connect voltmeter between terminal No. 2 (Green/White wire) and ground. See Fig 1. Install a jumper wire between terminal No. 1 and ground.NOTE: Ensure test lead connections are correct. If reversed, ignition control unit will be damaged.
- Crank engine. Ensure voltmeter reading is .20 volts minimum. If reading is incorrect, check wiring between switching module and control unit connector as follows.
- Remove control unit panel located on passenger side footwell. Unplug ignition control unit connector. Using an ohmmeter, check continuity between terminal No. 2 of control unit connector and terminal No. 1 of switching module connector.
- Also check continuity between terminal No. 22 of control unit connector and terminal No. 2 of switching module connector. Ohmmeter reading should be close to zero ohms for both tests. If not, check for open circuit between ignition control unit and switching module. If wiring is okay, replace control unit.