Pair System Inspection; Pair Valve Inspection; Check Pair System With Cold Engine; Check Pair System With Warm Engine - Toyota 22R-E Service Manual

ENGINE – EMISSION CONTROL SYSTEMS

PAIR SYSTEM INSPECTION

1. VISUALLY CHECK HOSES AND TUBES FOR
CRACKS, KINKS, DAMAGE OR LOOSE CONNEC–
TIONS

2. CHECK PAIR SYSTEM WITH COLD ENGINE

(a) The coolant temperature should be below 30 SC(86S
F).
(b) Disconnect the NO.1 PAIR hose from the air cleaner
case.
(c) Check that a bubbling noise is heard from the N0.1
PAIR hose at idle.

3. CHECK PAIR SYSTEM WITH WARM ENGINE

(a) Warm up the engine to above 40SC(104SF).
(b) With the engine idling, check that a bubbling noise is
not heard from the NO. 1 hose.
(c) Race the engine and quickly close the throttle valve.
Check that a bubbling noise stops momentarily.

PAIR VALVE INSPECTION

CHECK PAIR VALVE BY BLOWING AIR INTO PIPE
(a) Apply vacuum to the pair valve diaphragm.
(b) Blow air into a pipe and check that the pair valve is
(c) Release the vacuum and check that the pair valve is
closed.
EG1–97