文档介绍：12–1
EMISSION CONTROL – EMISSION CONTROL SYSTEM
EMISSION CONTROL SYSTEM
1204D–01
ON–VEHICLE INSPECTION
1. INSPECT AIR–FUEL PENSATION SYS-
TEM
HINT:
You can also check the system by choosing ”DATA MONITOR”,
then ”O2 SENSOR OUTPUT VOLTAGE” on the monitor of the
hand–held tester.
(a) Connect the hand–held tester to the terminal 23 (OX1A)
⇔ 7 (E1) and 21 (OX1B) ⇔ 7 (E1) of the ECM.
CAUTION:
Connect test leads from the back side of the connector with
the ECU connected.
OX1B
E1 (b) Warm up the oxygen sensor with the engine speed at
2,500 rpm for approx. 2 minutes.
(c) Confirm that the voltage changes between 0V to 1V with
the engine speed at 2,500 rpm.
OK:
The voltage changes more than 8 times in 10 se-
conds.
CAUTION:
OX1A
A65749 S Perform the check immediately after the end of the
warming up.
S If not confirming the change of voltage, warming up
the oxygen sensor again.
2. INSPECT FUEL CUT OFF RPM
(a) Increase the engine speed to at least 3,500 rpm.
(b) Use a sound scope to check for injector operating noise.
(c) Check that when the throttle lever is released, injector operation noise stops momentarily and then
resumes.
3. INSPECT EVAPORATIVE EMISSION CONTROL SYS-
TEM
(a) After starting the engine, disconnect the vacuum hose
shown in the illustration.
(b) Confirm vacuum occurs at the vsv port, when choosing
”