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1998 Chevrolet Blazer, ECM/Inputs/Outputs Waveform
Posted to the Waveform Library on 5/11/2018

This is a Known Good waveform of both coils on the IAC during a Key On event (KOEO).

Channel 1 = COIL A HIGH Control Channel 2 = COIL A LOW Control Channel 3 = COIL B HIGH Control Channel 4 = COIL B LOW Control

By viewing the voltage spikes at the top of the...

 

car Vehicle Data

1998 Chevrolet Blazer 4.3L

Engine4.3 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemECM/Inputs/Outputs
Component
ConditionKnown Good

car Vehicle Data

1998 Chevrolet Blazer 4.3L

Engine4.3 L / 6 cyl / GAS
Trans5-speed StandardTransmission
DeliveryFuel Injection
SubsystemECM/Inputs/Outputs
Component
ConditionKnown Good