INSPECTION OF ECM AND ITS CIRCUITS
ECM and its circuits can be checked at ECM wiring couplers by
measuring voltage and resistance.
CAUTION:
ECM cannot be checked by itself. It is strictly prohibited
to connect voltmeter or ohmmeter to ECM with couplers
disconnected from it.
VOLTAGE CHECK
1) Remove ECM from body with ignition switch OFF referring to
ECM REMOVAL.
2) Connect ECM couplers to ECM.
3) Check voltage at each terminal of couplers connected.
NOTE:
As each terminal voltage is affected by the battery voltage,
confirm that it is 11V or more when ignition switch is ON.
1. ECM
2. Couplers
3. Body ground
TERMINAL ARRANGEMENT OF ECM COUPLER (VIEWED FROM HARNESS SIDE)
ENGINE AND EMISSION CONTROL SYSTEM
6E1-43