2.
Checking condition: ECT 80~90℃(176~203 ℉)
All electrical load : OFF
Closed throttle position sw : ON
Engine is idling.
caution
The data shown above is only for reference and there may be a little difference actually.
This is the inspection procedure to determine whether it is present DTC or memoried one by monitoring the current signal or by using the function of oscilloscope with Hi-scan pro.
Connect the scan tool to DLC
Checking condition: ECT 80~90℃(176~203 ℉)
All electrical load : OFF
Closed throttle position sw : ON
Engine is idling.
The data shown above is only for reference and there may be a little difference actually.
Service standard
A/CON switch OFF : 25~45%
A/CON switch ON : 35~55%
Service standard
A/CON switch OFF : 25~45%
A/CON switch ON : 35~55%
Start engine and warm up to operating temperature.
Probe(+) : ISCA harness connector NO1.
Probe(-) : Chassis ground.
Using the channel 1,2 of scan tool,it is the waveform at terminal 1,3 of ISCA in idling
The wave must be opposite to each other.
The lower voltage must be below 1V and the upper must be battery voltage.
Using the channel 1,2 of scan tool,it is the waveform at terminal 1,3 of ISCA in idling
The wave must be opposite to each other.
The lower voltage must be below 1V and the upper must be battery voltage.
If the waveform changes as TPS changes or as A/CON switch on and off,it is normal.
In case there is no symptom and wrong data but DTC is shown
The problem may be intermittent so slightly shake the connector and harness vertically and horizontally to check if there is any data changes
If the data changes normally, the problem was intermittent so erase DTC and verify the same DTC reoccure.
o to "Terminal and Connector inspection" procedure.
In case there is symptom and wrong data with DTC
Check open,short or connector’s connection for ISCA.
Check the deterioration of ISCA performance.
Go to "Signal circuit inspection" procedure.
