Inspection of ECM and Its Circuits 3

Inspection of ECM and Its Circuits

26. Reference waveform No. 26







Fuel injector No.3 signal (4) at engine idling

27. Reference waveform No. 27







EGR valve signal at engine racing

28. Reference waveform No. 28







CKP sensor signal (1) at engine idling

29. Reference waveform No. 29







CKP sensor signal at engine idling

30. Reference waveform No. 30







Fuel injector No.6 signal (4) at engine idling

31. Reference waveform No. 31







Fuel injector No.5 signal (4) at engine idling

32. Reference waveform No. 32







Ignition coil signal at engine idling

33. Reference waveform No. 33







Ignition coil No.6 signal (3) at engine idling

34. Reference waveform No. 34







Ignition coil No.5 signal (3) at engine idling

35. Reference waveform No. 35







Ignition coil No.4 signal (3) at engine idling

36. Reference waveform No. 36







Ignition coil No.3 signal (3) at engine idling

37. Reference waveform No. 37







Ignition coil No.2 signal (3) at engine idling

38. Reference waveform No. 38







Ignition coil No.1 signal (3) at engine idling

Resistance Check

Ter. C51-3-7 - C51-3-4:

1. Disconnect couplers (1) from ECM with ignition switch OFF.

CAUTION: Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).

2. Check resistance between each pair of terminals of disconnected couplers (1) as listed in the following table.

CAUTION:
- Be sure to connect ohmmeter (2) probe from wire harness side of coupler.
- Be sure to turn OFF ignition switch for this check.
- Resistance in table represents that when parts temperature is 20 degrees C (68 degrees F).