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Ignition Control Module: Testing and Inspection
Output Transistor Signal Test

Refer to Fig. 5 when performing the following procedure.

Fig. 5 Bosch Motronic Electronic Engine Control System Terminal Identification

1.

With output transistor connected, expose transistor connector by pushing back rubber insulator. Using a suitable digital voltmeter check battery
voltage is present at terminals 2 and 3 by probing back side of connector. If no voltage reading is obtained, proceed as follows:

a. Check for 12 volts at ignition switch terminal 15.
b. Check ground connection terminal 2, and ground wire for continuity.

Powertrain Management > Ignition System > Ignition Control Module > Component Information > Testing and Inspection > Output Transistor Signal Test

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