Camry Wagon V6-2507cc 2.5L DOHC (2VZ-FE) (1988)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Component Test
ON-VEHICLE INSPECTION
CHECK FOR OPERATING SOUND FROM ISC VALVE.
Check that there is a clicking sound immediately stopping the engine.
0FF-VEHICLE INSPECTION
1. INSPECT ISC VALVE RESISTANCE.
Using an ohmmeter, measure the resistance between terminal B1 - S1 or S3, and B2 - S2 or S4.
Resistance:
B1 - S1 or S3 10 - 30 ohms
B2 - S2 or S4 10 - 30 ohms
If resistance is not as specified, replace the ISC valve.
2. INSPECT ISC VALVE OPERATION.
a. Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S1 - S2 - S3 - S4 - S1 in sequence, check that the valve moves
toward the closed position.
b. Apply battery voltage to terminals B1 and B2, and while repeatedly grounding S4 - S3 - S2 - S1 - S4 in sequence, check that the valve moves
toward the open position.