Sidekick 4WD L4-1590cc 1.6L SOHC 0 TBI 8V (1990)
Thermostatic Air Cleaner Vacuum Switch: Testing and Inspection
1.
Check vacuum hoses for proper installation, deterioration, or damage. Replace as necessary.
2.
With air cleaner cool, disconnect warm air hose from warm air duct.
3.
Reach into warm air duct to check that damper is closed with engine off.
4.
Start engine and run at idle. Damper should open warm air duct.
AIR CONTROL ACTUATOR:
1.
Disconnect vacuum hose from ACA.
2.
Using suitable vacuum pump, apply 7.87 inches Hg (20 cm Hg) of vacuum to ACA.
3.
Damper should open fully and remain open with vacuum applied.
THERMO SENSOR:
1.
Remove air cleaner.
2.
Disconnect two vacuum hoses from thermo sensor.
3.
Measure temperature around thermo sensor.
Fig. 11 Checking Thermo Sensor
4.
Cover long nozzle with finger and blow air into short nozzle, Fig. 11. Valve should be open at temperatures above 104°F and closed at
temperatures below 77°F.
5.
After testing, reconnect vacuum hoses and reinstall air cleaner.
