Main Unit (Popular)

Test Values And Control Module Connections For Popular







Scope
Values and instructions for testing the voltage levels of the control modules are found under the relevant headed sections.

Remember:
^ Observe the conditions set for testing and use common sense when assessing the results.
^ The test values presented apply when the ignition is in the ON position unless otherwise stated.
^ First make sure that the control module is receiving power and that it is grounded.
^ Then check all the sensor inputs and signals from other systems.
^ Finally, check the control module outputs. Remember that the test values do not indicate whether the module is working.
^ If a test value is incorrect, consult the wiring diagram to trace which leads, connectors and components should be checked more thoroughly.
^ The specified test values refer to those obtained with calibrated Fluke 88/97.
^ Test values in % (+) and ms (+) show the pulse ratio and pulse duration of the signal. A test instrument capable of giving pulse ratio and pulse duration readings should be used. The (+) symbol indicates a positive trigger pulse, TRIG+.







Main unit connections (26-pin)

Pin No 1-2:

Pin No 3-10:

Pin No 11-14:

Pin No 15-21:

Pin No 22-26: