B Series Truck 4WD L4-2606cc 2.6L SOHC (1992)
Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
AIR VALVE
Removing BAC Valve
1. Remove BAC valve screws and separate valve from throttle body.
Checking Bypass Air Control Valve
2. Blow air through valve from port "A" and check that air comes out of port "B" when BAC valve is cold.
3. Place BAC valve into hot water (more than 80°C [176°F]) for one minute.
4. Blow air through valve from port "A" and check that no air comes out of port "B".
5. If not as described, replace valve.
Installing BAC Valve
When re-installing valve on throttle body, use new O-ring and gasket.
SOLENOID VALVE (ISC)
Checking Idle Speed Control (ISC) Valve Resistance
1. Disconnect solenoid valve (ISC) connector.