Inspection Using Oscilloscope
PROCEDURE
With the engine idling measure between terminals ISC1, ISC2, ISC3, ISC4 and E01 of Engine Control Module when A/C switch ON or OFF. The correct waveform appears as shown in the illustration.
With the engine idling measure between terminals ISC1, ISC2, ISC3, ISC4 and E01 of Engine Control Module when A/C switch ON or OFF. The correct waveform appears as shown in the illustration.