Page text (OCR transcript)
INSPECTION OF DP SYSTEM
1. WARM UP ENGINE
2. CHECK IDLE SPEED
3. CHECK DP SETTING SPEED
(a) Maintain engine speed at 3,000 rpm.
(b) Pinch the vacuum hose between DP and VTV.
Pinch
VTV
Throttle Valve Open
3000
rpm
DP Diaphragm
EC1217
(c) Release the throttle valve.
(d) Check that the DP is set.
DP setting speed: 2,000 rpm
Pinch
Throttle Valve Released
2000
rpm
DP Set
EC1218
If not at specified speed, adjust with the DP adjusting bolt.
DP Adjusting Bolt
EC1219
4. CHECK OPERATION OF VTV
(a) Set the DP speed in the same procedure as above; (a) to (c).
(b) Release the pinched hose and check that the engine returns to idle speed in about 1 second.
Released
About 1 Second
Idle
rpm
EC1220
IF NO PROBLEM IS FOUND WITH THIS INSPECTION, THE SYS-TEM IS OKAY; OTHERWISE INSPECT VTV
