trip computer OPEL VECTRA 1988 Service User Guide

Refitting
11Refitting is a reversal of removal, but
make sure that the column switch gaiters
engage in the cut-outs in the upper shroud.
Instrument panel lower trim
panel
Removal
12Remove the steering column shrouds, as
described previously in this Section.
13The panel is secured by clips at either
end, which must be released by pulling the
ends of the panel from the facia (see
illustration). This is a tricky operation, as to
release both ends, the panel must be bent
slightly at its centre. Take great care, as the
panel is easily broken.
Refitting
14Refitting is a reversal of removal.
Instrument panel upper trim
panel
Removal
15Remove the instrument panel lower trim
panel, as described previously in this Section.
16Extract the two now-exposed lower trim
panel securing screws, one from each end of
the panel, noting that the left-hand screw also
secures the heater control panel (see
illustration).
17Withdraw the panel from the facia (see
illustration).
Refitting
18Refitting is a reversal of removal.
Lighting switch panel
Removal
19Remove the instrument panel upper and
lower trim panels, as described previously in
this Section.
20Remove the remaining securing screw
from the left-hand side of the lighting switch
panel (see illustration).
21Pull the lighting switch panel from the
facia, to release the securing clips at the
right-hand end.
22Ensure that the battery negative lead has
been disconnected, then disconnect the
wiring plugs from the switches, and withdraw
the switch panel (see illustration).
Refitting
23Refitting is a reversal of removal.
Radio/oddments tray panel
Removal
24Remove the radio, as described in
Chapter 12.
25Remove the lower and upper instrument
panel trim panels, as described previously in
this Section.
26Remove the lower securing screw from
the right-hand side of the heater control
panel.
27Remove the clock or trip computer, as
applicable, from the facia referring to Chapter
12, if necessary.
28Remove the two now-exposed heater
control panel securing screws from the
clock/trip computer aperture.
29Carefully manipulate the heater control
panel forwards within the limits of the control
cable travel, then manipulate the
radio/oddments tray out from the facia. This is
a tricky operation, as the radio/oddments tray
securing lugs rest behind the heater control
panel securing lugs (see illustrations). Take
care not to strain the heater control cables.
30With the radio/oddments tray removed,
the radio support tray can be removed if
desired by unscrewing the two securing
screws, then sliding the tray forwards to
disconnect the wiring and aerial plugs (see
illustrations).
Refitting
31Refitting is a reversal of removal, taking
care not to damage the heater control
components as the radio/oddments tray is
manipulated into position.
Bodywork and fittings 11•17
37.17 Withdrawing the instrument panel
upper trim panel
37.29B Manipulating the radio/oddments
tray from the facia37.29A Right-hand securing lug (arrowed)
behind heater control panel37.22 Disconnecting the wiring plugs from
the lighting switches
37.20 Removing the lower left-hand
lighting switch panel securing screw
37.16 Unscrewing the left-hand instrument
panel upper trim panel securing screw37.13 Removing the instrument panel
lower trim panel
11

4Pull the cassette storage box or the rubber
mat, as applicable, from the rear of the centre
console to expose the rear securing screw
(see illustration).
5Extract the rear securing screw (see
illustration), then withdraw the rear centre
console section upwards, feeding the gaiter
over the handbrake lever.
6Where applicable, ensure that the battery
negative lead has been disconnected, then
disconnect the wiring plug(s) from the electric
window and/or trip computer switches.
Refitting
7Refitting is a reversal of removal.
Front section
Removal
8Remove the rear centre console section, as
described previously in this Section.
9Remove the gearchange lever, as described
in Chapters 7A or 7B, as applicable. 10Disconnect the battery negative lead, if
not already done.
11Pull the ashtray assembly from the centre
console, and disconnect the wiring plugs from
the cigarette lighter (see illustration).
12Extract the two now-exposed screws
securing the centre console to the facia (see
illustration).
13Working at either side of the centre
console, remove the two lower centre
console-to-facia securing screws, and the two
centre console-to-floor bracket securing
screws (see illustration).
14The front centre console section can now
be withdrawn.
Refitting
15Refitting is a reversal of removal, but feed
the cigarette lighter wiring through the
aperture in the centre console as the centre
console is offered into position.
39Headlining -removal and
refitting
3
Removal
1Where applicable, remove the sunroof
crank drive, as described in Section 34.
2Remove the grab handles from the sides of
the roof (see illustration).
3Remove the sunvisors. On models with
illuminated sunvisor vanity mirrors,
disconnect the battery negative lead, then pull
the lamp wiring from the roof as the sunvisor
is withdrawn and disconnect the wiring plugs.
4On models without a sunroof, disconnect
the battery negative lead (if not already done),
then prise the courtesy lamp and its trim panel
from the roof and disconnect the wiring.
5Open the doors, and prise the
weatherstrips from the tops of the door
apertures.
6Remove the front body pillar and centre
body pillar trim panels, as described in
Section 36.
7Loosen the upper edge of the rear quarter
trim panels, referring to Section 36 if
necessary.
8On Hatchback models, open the tailgate,
and prise the rear trim panel from the roof.
9With the help of an assistant, lower the
headlining from the roof, and withdraw it
through the tailgate on Hatchback models or
through one of the door apertures on Saloon
models.
Bodywork and fittings 11•19
38.4 Pull the cassette storage box from
the console . . .
38.12 Extract the two centre console-to-
facia securing screws38.11 Disconnecting the wiring plugs from
the cigarette lighter
38.3 Pull the grip from the handbrake lever38.2 . . . then extract the front securing
screw
11
38.5 . . . then extract the rear securing
screw
38.13 Unscrewing a side centre console-
to-facia securing screw39.2 Removing a grab handle securing
screw

4Position a container beneath the tank, then
disconnect the bottom hose and allow the
contents of the tank to drain into the
container. Suspend the bottom hose as high
as possible above the engine to prevent
coolant loss.
Refitting
5Refitting is a reversal of removal, but on
completion check and if necessary top-up the
coolant level, as described in Section 4. The
coolant drained from the expansion tank
during removal can be re-used, provided it
has not been contaminated.
Coolant level sensor
6The coolant level sensor, where fitted, is an
integral part of the expansion tank cap. If the
level sensor is faulty, the complete cap
assembly must be renewed.
14Temperature gauge sender -
removal and refitting
2
Removal
1The sender is screwed into the inlet
manifold on 1.4 and 1.6 litre models (except
C16 NZ2), and into the thermostat housing
on C16 NZ2, 1.8 and 2.0 litre models (see
illustrations).
2Partially drain the cooling system, as
described in Section 2, to minimise coolant
spillage.
3Disconnect the battery negative lead.4Disconnect the wiring from the switch, then
unscrew the switch from its location.
Refitting
5Refitting is a reversal of removal,
remembering the following points.
6Coat the sender threads with sealant before
fitting.
7Top-up the cooling system, as described in
Section 4.
8On completion, start the engine and check
the operation of the temperature gauge. Also
check for coolant leaks.
15Cooling fan switch -removal
and refitting
3
Note: A new sealing ring should be used
when refitting the switch
Removal
1The cooling fan switch is located at the
bottom right-hand corner of the radiator (see
illustration).
2If a faulty switch is suspected, the circuit to
the fan motor can be tested by temporarily
bridging the terminals in the switch wiring
plug, and switching on the ignition. If the
cooling fan now operates, the switch is faulty
and should be renewed. To remove the
switch, continue as follows.
3Disconnect the battery negative lead, then
disconnect the switch wiring plug if not
already done.4Drain the cooling system, as described in
Section 2.
5Unscrew the switch from the radiator and
recover the sealing ring.
Refitting
6Refitting is a reversal of removal, but use a
new sealing ring, and refill the cooling system
as described in Section 4.
7On completion, start the engine and run it
until it reaches normal operating temperature,
then continue to run the engine and check
that the cooling fan cuts in and functions
correctly.
16Heater control panel -
removal and refitting
3
Removal
1Disconnect the battery negative lead.
2Remove the passenger side footwell trim,
the steering column shrouds, and the
instrument panel lower and upper trim panels,
as described in Chapter 11.
3Remove the clock or trip computer, as
applicable, from the facia, referring to Chapter
12 if necessary.
4Remove the two heater control panel
securing screws from the clock/trip computer
aperture, and the remaining securing screw
from the right-hand end of the panel (exposed
by removing the instrument panel lower trim
panel), (see illustrations).
3•6Cooling, heating and ventilation systems
14.1A Disconnecting the wiring from the
temperature gauge sender - 1.6 litre model14.1C Temperature gauge sender location
(arrowed) - 2.0 litre DOHC model
16.4B . . . and the remaining screw from
the right-hand end of the panel16.4A Remove the two heater control
panel securing screws from the clock/trip
computer aperture . . .15.1 Cooling fan switch location -
2.0 litre SOHC model viewed from below
14.1B Temperature gauge sender location
(arrowed) - 2.0 litre SOHC model

REF•22Glossary of Technical Terms
EEGR valveA valve used to introduce exhaust
gases into the intake air stream.
Electronic control unit (ECU)A computer
which controls (for instance) ignition and fuel
injection systems, or an anti-lock braking
system. For more information refer to the
Haynes Automotive Electrical and Electronic
Systems Manual.
Electronic Fuel Injection (EFI)A computer
controlled fuel system that distributes fuel
through an injector located in each intake port
of the engine.
Emergency brakeA braking system,
independent of the main hydraulic system,
that can be used to slow or stop the vehicle if
the primary brakes fail, or to hold the vehicle
stationary even though the brake pedal isn’t
depressed. It usually consists of a hand lever
that actuates either front or rear brakes
mechanically through a series of cables and
linkages. Also known as a handbrake or
parking brake.
EndfloatThe amount of lengthwise
movement between two parts. As applied to a
crankshaft, the distance that the crankshaft
can move forward and back in the cylinder
block.
Engine management system (EMS)A
computer controlled system which manages
the fuel injection and the ignition systems in
an integrated fashion.
Exhaust manifoldA part with several
passages through which exhaust gases leave
the engine combustion chambers and enter
the exhaust pipe.
FFan clutchA viscous (fluid) drive coupling
device which permits variable engine fan
speeds in relation to engine speeds.Feeler bladeA thin strip or blade of hardened
steel, ground to an exact thickness, used to
check or measure clearances between parts.
Firing orderThe order in which the engine
cylinders fire, or deliver their power strokes,
beginning with the number one cylinder.
Flywheel A heavy spinning wheel in which
energy is absorbed and stored by means of
momentum. On cars, the flywheel is attached
to the crankshaft to smooth out firing
impulses.
Free playThe amount of travel before any
action takes place. The “looseness” in a
linkage, or an assembly of parts, between the
initial application of force and actual
movement. For example, the distance the
brake pedal moves before the pistons in the
master cylinder are actuated.
FuseAn electrical device which protects a
circuit against accidental overload. The typical
fuse contains a soft piece of metal which is
calibrated to melt at a predetermined current
flow (expressed as amps) and break the
circuit.
Fusible linkA circuit protection device
consisting of a conductor surrounded by
heat-resistant insulation. The conductor is
smaller than the wire it protects, so it acts as
the weakest link in the circuit. Unlike a blown
fuse, a failed fusible link must frequently be
cut from the wire for replacement.
GGapThe distance the spark must travel in
jumping from the centre electrode to the sideelectrode in a spark plug. Also refers to the
spacing between the points in a contact
breaker assembly in a conventional points-
type ignition, or to the distance between the
reluctor or rotor and the pickup coil in an
electronic ignition.
GasketAny thin, soft material - usually cork,
cardboard, asbestos or soft metal - installed
between two metal surfaces to ensure a good
seal. For instance, the cylinder head gasket
seals the joint between the block and the
cylinder head.
GaugeAn instrument panel display used to
monitor engine conditions. A gauge with a
movable pointer on a dial or a fixed scale is an
analogue gauge. A gauge with a numerical
readout is called a digital gauge.
HHalfshaftA rotating shaft that transmits
power from the final drive unit to a drive
wheel, usually when referring to a live rear
axle.
Harmonic balancerA device designed to
reduce torsion or twisting vibration in the
crankshaft. May be incorporated in the
crankshaft pulley. Also known as a vibration
damper.
HoneAn abrasive tool for correcting small
irregularities or differences in diameter in an
engine cylinder, brake cylinder, etc.
Hydraulic tappetA tappet that utilises
hydraulic pressure from the engine’s
lubrication system to maintain zero clearance
(constant contact with both camshaft and
valve stem). Automatically adjusts to variation
in valve stem length. Hydraulic tappets also
reduce valve noise.
IIgnition timingThe moment at which the
spark plug fires, usually expressed in the
number of crankshaft degrees before the
piston reaches the top of its stroke.
Inlet manifoldA tube or housing with
passages through which flows the air-fuel
mixture (carburettor vehicles and vehicles with
throttle body injection) or air only (port fuel-
injected vehicles) to the port openings in the
cylinder head.
Exhaust manifold
Feeler blade
Adjusting spark plug gap
Gasket
EGR valve