
Exhaust emission system
Exhaust gases are drawn from the engine through the
exhaust manifold, front exhaust pipe 2 (Fig.9-15), catalytic con-
verter 11, front silencer 15 and main silencer 13.
The downpipe is connected to the catalytic converter flange
by means of a movable joint. Between the flanges there is a met-
allographite ring with a spherical surface.
Downpipe 2 is secured with nuts 5 onto exhaust manifold
studs 4, gasket 6 is fitted between them. Lock plates 3 are placed
under the nuts. The other end of the downpipe by means of clasp
1 is secured to bracket 8, fitted to the transmission cover.
Main silencer 13 is attached to the underbody by two sus-
pension loops 12.
The silencers complete with pipes represent single units and
should be renewed as such during repair.
Electrical system
An EMS wiring harness is added to the vehicle electrical sys-
tem (Fig.9-16) to connect the ECU with EMS sensors and actua-
tors. No headlamp wipe/wash is fitted to VAZ 21214-20 vehicle.
Three wires of the EMS wiring harness through a separate
plug are connected to the tachometer LT input in the instrument
cluster, to «CHECK ENGINE» lamp and to ignition switch termi-
nal «15».
There are four fuses in the EMS wiring harness. They are
located in a separate fusebox 26, underneath the left-hand end
trim cover. Refer to Table 9-2 for details.
Table 9-2
Injection system fuses
Fuse
Circuits protected
1-2
Electric fuel pump relay (contacts).
Electric fuel pump.
3-4
ECU.
5-6
Main relay (contacts).
Oxygen sensor. Vehicle speed sender.
Canister purge solenoid.
Electric fuel pump relay (winding).
Electrical fan blower relay (winding). ECM.
MAF meter. Injection wiring harness.
7-8
Electric fan blower relay (contacts).
Electric fans.
Besides the fuses there is «a fusible link» at the end of red
wire, which is connected to the battery «+» terminal. The «fusible
link» represents a length of black wire of 1 mm
2
cross-section,
whereas the main red wire is 6 mm
2
cross-section.
Cooling fan motors.
The cooling fans are operated by two
dc motors (MP 8015 model) on permanent magnets.
The motors are triggered by EMS ECU via a relay. With the
engine running the relay cuts in when the coolant temperature
exceeds 105
°
ë or cuts off when the coolant temperature goes
below 101
°
ë.
The motors are maintenance-free and must be renewed in
case of failure.
Motor specification
Nominal shaft speed with impeller load, rpm . . . . . . . . .2000 - 2200
Current consumption at speeds and loads
as specified, amperes, not greater . . . . . . . . . . . . . . . . . . . . . . . .15
196
Fig.9-15. Exhaust emission system:
1 - clasp; 2 - front exhaust pipe; 3 - lock plate; 4 - pin; 5 - nut; 6 - gasket; 7 - oxygen sensor; 8 - bracket; 9 - bolt; 10 - conical string; 11 - catalytic converter; 12 - suspen-
sion loop; 13 - main silencer; 14 - clip; 15 - front silencer
Содержание 21213
Страница 1: ...VAZ VEHICLES VAZ 21213 VAZ 21214 VAZ 21214 20 VAZ 21215 REPAIR MANUAL ...
Страница 8: ...8 Fig 2 2 Front sectional view of the engine ...
Страница 135: ...135 ...
Страница 136: ...136 ...