2.
Probe(+) : ISCA power circuit NO2.
Probe(-) : ISCA open signal circuit NO3 and close circuit NO1.
a.
Specification: 20℃(68℉) : 16.5~18.5Ω
The purpose of measuring ISCA resistance is to find if the open circuit is in the component.
Measure resistance of ISCA battery power circuit between ground circuit.
Probe(+) : ISCA power circuit NO2.
Probe(-) : ISCA open signal circuit NO3 and close circuit NO1.
Specification: 20℃(68℉) : 16.5~18.5Ω
Does each resistance indicate continuity circuit?
YES
Go to "System Inspection"
NO
Open circuit ISCA
Turn ignition switch to OFF.
Check that ISCA actuator valve is clean and not sticking.
Check that throttle lever return spring is clean and sticking.
Check intake air system and vacuum hoses to intake air system.
Are the results of these checks OK?
YES
Verify ECM connector is secure
If OK, replace ISCA actuator with known good component.
Clear code and verify code does not reappear
If problem persists, replace ECM
NO
Repair as necessary and go to "Verification of Vehicle Repair"
