Toyota 4-Runner 1985 Repair Manual page 138

EC-38
EMISSION CONTROL SYSTEMS (CARB.)
Air Suction and Fuel System
Feedback Control System
f9J
- D
'I
No Bubbling Noise
Between 18 - 44°C
1,390 rpm
Tachometer
Above 55°C
1,390 rpm
Tachometer
Tachometer
ECll00
J~J;
Bubbling Noise
EC0137 ECl16l
EC0137 ECll62
Bubbling Noise
EC0136 Eel16l
ECl164 ECll00
INSPECTION OF AS SYSTEM
1. VISUAL Y CHECK HOSES AND TUBES FOR
CRACKS, KINKS, DAMAGE OR LOOSE COI'JNECTIOI\
2. DISCONNECT AS HOSE FROM EACV
3. CHECK COLD CONDITION
(a) The coolant temperature should be below 6°C (43°F).
(b) Check that a bubbling noise is not heard from the
EACV.
(c)
(d)
(e)
Warm up the engine to between 18 - 44°C (64 -
111°F).
Maintain engine speed at above 1,390 rpm.
Check that a bubbling noise is heard from the EACV.
A03056
4. CHECK HOT CONDITION
(a) Warm up the engine to above 55°C (131°F).
(b) Maintain engine speed at above 1,390 rpm.
(c) Check that a bubbling noise is heard intermitten
from the EACV.
5. CHECK IDLE CONDITION
With the engine idling (below 1,000 rpm, below 7 mph),
check that a bubbling noise is heard from the EACV.
6. CHECK HEAVY LOAD CONDITION
(a) The coolant temperature should be above 18°C
(64°F)
(b) Disconnect the vacuum hose from the vacuum switch
and plug the hose end.
(c) Check that a bubbling noise is not heard from
t
EACV.
7. RECONNECT HOSES TO PROPER LOCATION