1988 OPEL CALIBRA seat adjustment

12•38Wiring diagrams
Key to wiring diagrams for 1991 models
NoDescriptionTrackNoDescriptionTrack Wiring diagrams for 1991 models
Location of applicable circuitsTrackLocation of applicable circuitsTrack
Air conditioning system800 to 850
Alternator111
Anti-lock braking system (ABS)701 to 722
Anti-theft alarm system633 to 647
Automatic transmission control system773 to 799
Battery100
Brake lamps461 to 462
Carburettor118 to 121
Central locking system600 to 627
Check control system347 to 371
Cigarette lighter597 to 598
Clock661 to 663
Courtesy lamps - front487 to 494
Courtesy lamps - rear569 to 573
Direction indicator and hazard warning lamps467 to 482
Door mirrors536 to 548
Electric windows665 to 699
Engine compartment lamp415
Foglamps - front444 to 452
Foglamps - rear444 to 457
Fuel injection and ignition (Multec) - C16NZ engine129 to 164
Fuel injection and ignition (Multec) - C18NZ engine972 to 997
Fuel injection/ignition (Motronic M1.5) - 2.0litre sohc 168 to 199
Fuel injection/ignition (Motronic M2.5) - 2.0litre dohc 261 to 299
Glovebox lamp599Headlamp aim adjustment system758 to 766
Headlamp dim-dip427 to 431
Headlamp washers519 to 532
Headlamps437 to 442
Headlamps “ON” warning buzzer493 to 495
Heated front seats560 to 566
Heated rear window549 to 556
Heater blower motor853 to 862
Horn(s)592 to 596
Ignition (HEI) - 14NV engine121 to 128
Ignition (MSTS/EZ+) - 16SV, 18 SV engines236 to 256
Instruments301 to 344
Luggage compartment lamp485
Radiator cooling fan113, 115
Radio/cassette player586 to 591
Rear number plate lamp413
Reversing lamps496 to 498
Side and tail lamps401 to 410
Starter motor102 to 110
Sunroof863 to 870
Tailgate wiper510 to 516
Trip computer650 to 662
Windscreen and tailgate washers511 to 529
Windscreen wipers501 to 506
E1Side lamp - left406
E2Tail lamp - left356, 374, 407
E3Number plate lamp413
E4Side lamp - right409
E5Tail lamp - right358, 376, 410
E6Engine compartment lamp415
E7Headlamp main beam - left437
E8Headlamp main beam - right438
E9Headlamp dipped beam - left360, 378, 439
E10Headlamp dipped beam - right362, 380, 440
E11Instrument illumination lamps328 to 329
E12Selector lever illumination lamp (automatic transmission)799
E13Luggage compartment lamp485
E14Courtesy lamp487
E15Glovebox lamp599
E16Cigarette lighter illumination lamp596
E17Reversing lamp - left497
E18Reversing lamp - right498
E19Heated rear window552
E20Front foglamp - left448
E21Front foglamp - right447
E24Rear foglamp - left454
E25Driver’s seat heater580
E27Courtesy lamp - rear left569 to 570
E28Courtesy lamp - rear right572 to 573
E30Passenger front seat heater564
E32Clock illumination lamp663
E38Trip computer illumination lamp654
E39Rear foglamp - right455
E41Courtesy lamp (with delay)488 to 490
E50Kerb lamp - driver’s door666
E51Kerb lamp - passenger door684
F1 onFusesVarious
G1Battery101
G2Alternator111
G3Battery - (Diesel models)882, 901
G6Alternator - (Diesel models)884 to 886, 909 to 911H1Radio/cassette player589 to 590, 634
H2Horn592
H3Direction indicator warning lamp315 to 320
H4Oil pressure warning lamp310
H5Brake fluid level warning lamp313
H6Hazard warning flasher lamp470
H7Alternator charge warning lamp310
H8Headlamp main beam warning lamp322
H9Brake lamp - left364, 382, 461
H10Brake lamp - right366, 384, 462
H11Direction indicator lamp - front left472
H12Direction indicator lamp - rear left473
H13Direction indicator lamp - front right461
H14Direction indicator lamp - rear right482
H15Fuel level warning lamp305
H16Glow plug warning lamp (Diesel models)323
H17Trailer direction indicator warning lamp321
H18Horn593
H19Headlamps-on warning buzzer494 to 495
H21Handbrake-on warning lamp315
H25Door mirror warning lamp542, 952
H26ABS warning lamp319
H30Engine fault warning lamp324
H33Direction indicator side repeater lamp - left476
H34Direction indicator side repeater lamp - right478
H42Automatic transmission warning lamp325
H45Four-wheel-drive warning lamp327
H46Catalytic converter temperature warning lamp329
H47Anti-theft alarm horn638
H48Horn594
K3Relay - starter motor (anti-theft alarm)109 to 110
K5Relay - front foglamps448 to 450
K6Relay - air conditioning801 to 802
K7Relay - air conditioning blower804 to 805
K8Relay - intermittent windscreen wipe503 to 506
K9Relay - headlamp wash519 to 520
K10Relay - direction indicator/hazard warning flashers467 to 469

12•40Wiring diagrams
Key to wiring diagrams for 1991 models (continued)
NoDescriptionTrackNoDescriptionTrack
S1.2Key contact switch586
S2.1Lighting switch404 to 407
S2.2Courtesy lamp switch487
S2.3Instrument illumination lamp dimmer328
S3Heater blower switch853 to 860
S4Heated rear window and mirror switch554 to 556
S5.2Dipped beam switch438 to 439
S5.3Direction indicator switch480 to 482
S5.4Sidelamp switch401 to 402
S7Reversing lamp switch497
S8Brake lamp switch462
S9.2Windscreen wiper interval switch501 to 504
S9.5Rear window washer/wiper switch514 to 516
S10Automatic transmission starter inhibitor switch773 to 779
S11Brake fluid level warning sensor31
S13Handbrake-on warning switch315
S14Oil pressure switch310
S15Luggage compartment lamp switch485
S17Passenger door courtesy lamp switch490
S21Front fog lamp switch450 to 452
S22Rear foglamp switch455 to 457
S24Air conditioning blower motor switch804 to 811
S27Air conditioning compressor low-pressure switch821
S28Air conditioning compressor high-pressure switch821
S29Cooling fan switch113
S30Driver’s seat heater switch560 to 562
S31Rear door courtesy lamp switch - left491
S32Rear door courtesy lamp switch - right491
S37Driver’s door electric window switch assembly668 to 694
S37.1Electric window switch - front left668 to 670
S37.2Electric window switch - front right686 to 688
S37.3Electric window switch - rear left674 to 676
S37.4Electric window switch - rear right692 to 694
S37.5Electric window safety cut-out switch672 to 673
S37.6Electric window anti-jam switch690
S37.7Electric window automatic control677 to 682
S39Electric window switch - rear left door678 to 680
S40Electric window switch - rear right door696 to 698
S41Central locking switch - driver’s door601 to 603
S42Central locking switch - passenger door605
S44Throttle position sensor278 to 279
S47Driver’s door courtesy lamp switch493 to 494
S52Hazard warning flasher switch469 to 474
S55Passenger seat heater switch564 to 566
S57Sunroof switch864 to 869, 872 to 877
S63.1Trip computer function reset switch656
S63.2Trip computer clock hours adjustment switch657
S63.3Trip computer function select switch658
S63.5Trip computer clock minutes adjustment switch659
S64Horn switch592, 595
S68.1Door mirror adjustment switch538 to 540, 945 to 950
S68.3Door mirror left/right selector switch537 to 541, 946 to 950
S68.4Door mirror parking position switch952
S76Air conditioning compressor switch - high-pressure fan827
S82Washer pump switch347, 392
S88Cooling fan switch115 to 116, 935 to 936
S93Coolant level sensor348, 393
S95Oil level sensor349, 394
S98Headlamp aim adjustment switch758 to 760
S99Electric window switch - driver’s door685
S100Electric window switch - passenger door683
S101Air conditioning compressor switch822 to 824
S102Air conditioning circulation switch816 to 818
S104Automatic transmission kickdown switch794
S105Automatic transmission “Winter” mode button796 to 798
S106Automatic transmission “Economy/Sport” mode button793S109Air conditioning compressor switch818
S115Automatic transmission coolant temperature switch788 to 789
S116Brake lamp switch464 to 465
S117Four-wheel-drive hydraulic pressure switch729
S119Air conditioning refrigerant temperature switch829, 843
S120Anti-theft alarm bonnet switch635
S127Central locking switch - tailgate (Calibra models)630
S128Air conditioning refrigerant temperature cooling switch825 to 826
S131Air conditioning defroster lever limit switch815
U2Trip computer651 to 662
U4ABS hydraulic modulator assembly705 to 718, 738 to 751
U4.1ABS hydraulic pump relay706 to 709, 739 to 742
U4.2ABS solenoid valves relay715 to 718, 747 to 751
U4.3ABS hydraulic pump705, 738
U4.4ABS diode717
U4.5ABS solenoid valve - front left710, 743
U4.6ABS solenoid valve - front right711, 744
U4.7ABS solenoid valve - rear left712, 745
U4.8ABS solenoid valve - rear right713
U5Check control display347 to 355
U5.1Check control washer fluid level warning lamp352
U5.2Check control oil level warning lamp351
U5.3Check control coolant level warning lamp350
U5.4Check control tail lamp and dipped beam bulb
failure warning lamp349
U5.5Check control brake lamp bulb failure warning lamp348
U5.6Check control brake wear warning lamp347
U6LCD instruments
U6.1Check control washer fluid level warning lamp392
U6.2Check control oil level warning lamp394
U6.3Check control coolant level warning lamp393
U6.4Check control tail lamp and dipped beam bulb
failure warning lamp391
U6.5Check control brake lamp bulb failure warning lamp395
U6.6Check control brake pad wear warning lamp396
U12.1Temperature switch (Diesel models)898, 931
U12.2Fuel filter heater (Diesel models)899, 932
U13AF14/20automatic transmission782 to 786
U13.1Solenoid - 1/2 and 3/4 shift up782
U13.2Solenoid - 2/3 shift up783
U13.3Solenoid - converter lock-up control784
U13.4Solenoid - main fluid pressure control785
V1Brake fluid level warning lamp test diode312
V8Air conditioning compressor diode820
Y1Air conditioning compressor clutch821
Y4Headlamp washer solenoid valve520
Y5Fuel solenoid valve (Diesel models)893, 928
Y7Fuel injectors187 to 194, 280 to 287
Y10Distributor (Hall-effect)246 to 251
Y23Distributor (inductive discharge)123 to 127
Y24Distributor (inductive discharge)129 to 136
Y25Idle-up solenoid valve (automatic transmission)242
Y30Cold start valve (Diesel models)896
Y32Fuel injector140, 979
Y33Distributor170, 262, 972 to 974
Y34Fuel tank vent valve193, 292
Y35Air conditioning circulation solenoid valve816
Y44Four-wheel-drive solenoid valve731
Y47Parking brake lock lifting magnet (automatic transmission)769
X13Diagnostic equipment connector149, 170 to 171, 254 to 255,
269 to 270, 325, 339 to 340,
752 to 753, 774 to 775, 992 to 993
X15Octane coding plug160, 184 to 185, 248 to 249, 990 to 991
X54Ignition coding plug270 to 271
X1 onWiring connectorsVarious

Wiring diagrams 12•57
12
Key to wiring diagrams for 1992 and later models (continued)
NoDescriptionTrackNoDescriptionTrack
S20.2High pressure compressor switch925
S20.3High pressure blower compressor switch939
S21Fog lamps switch555 to 557
S22Rear fog lamp switch549 to 551
S24Air conditioning blower switch904 to 911
S29Coolant temperature switch118, 137, 357, 942, 957, 972
S30Left front heating mat switch660 to 662
S31Rear left door contact switch591
S32Rear right door contact switch592
S33Traction control switch1130, 1131
S37Window lifter switch868 to 894
S37.1Left window lifter switch868 to 870
S37.2Right window lifter switch886 to 888
S37.3Left rear window lifter switch874 to 876
S37.4Right rear window lifter switch892 to 894
S37.5Safety switch872, 873
S37.6Window anti-jam off switch890
S37.7Automatic window lifter control877 to 882
S39Left rear door window lifter switch878 to 880
S40Right rear door window lifter switch896 to 898
S41Driver door burglary locking switch800 to 802
S42Passenger door central locking switch805
S44Throttle valve switch316, 317
S47Driver door contact switch593, 594
S52Hazard warning switch569 to 573
S53First gear identification switch372
S55Right front heating mat switch664 to 666
S57Sun roof switch1170 to 1183
S63Computer switch
S63.1Function reset switch856
S63.2Clock hours adjustment switch857
S63.3Function select switch858
S63.4Clock minute adjustment switch859
S64Horn switch672
S68Outside mirror switch assy
S68.1Outside mirror adjustment switch638 to 640, 758 to 762
S68.3Left/right outside mirror switch637 to 641, 759 to 763
S68.4Parking position switch765
S82Washer fluid minimum capacity control switch736
S882 stage coolant temperature switch120, 121, 137, 138, 430, 431
S89Seat belt switch998
S93Coolant minimum capacity control switch737
S95Engine oil minuimum capacity control switch738
S98Headlamps levelling switch691 to 693
S99ZV driver door window lifter switch865
S100ZV passenger door window lifter switch883
S101Compressor switch926 to 928
S102Circulation switch918 to 920
S103Transmission temperature switch350
S104Kickdown switch493
S105Start-up assistance switch495 to 497
S106Economy power program switch492
S109Acceleration revolution pressure switch921
S115Coolant temperature switch487, 488
S116Stop lamp switch564, 565
S117Hydraulic pressure switch346
S120Engine compartment hood (anti-theft warning unit) switch835
S127Calibra tail gate central locking switch831
S128Coolant temperature switch936,937S131Defroster lever limit switch918
U2Computer851 to 862
U4ABS hydroaggregate1102 to 1122, 1146 to 1164
U4.1Pump motor relay1102, 1103, 1146, 1147
U4.2Solenoid valves relay1104, 1105, 1148, 1149
U4.3Pump motor1102,1146
U4.4Diode1105,1149
U4.5Left front solenoid valve1109,1153
U4.6Right front solenoid valve1111,1155
U4.7Rear axle solenoid valve1113,1157
U4.8ABS control unit1106 to 1122, 1150 to 1164
U4.9Solenoid valves plug1109 to 1113, 1153 to 1157
U5Check control display
U5.1Washer fluid minimum capacity telltale741
U5.2Oil minimum capacity telltale740
U5.3Coolant minimum capacity telltale739
U5.4Tail light & low beam telltale738
U5.5Stop light failure telltale737
U5.6Front brake lining telltale736
U12Filter heater
U12.1Temperature switch426, 452
U12.2Filter heater427, 453
U13Automatic transmission
U13.1Solenoid valve (shift 1)481
U13.2Solenoid valve (shift 2)482
U13.3Solenoid valve (lock up control)483
U13.4Solenoid valve (pressure control)484
U17Roof antenna amplifier795
V1Brake fluid test bulb diode712
V8Air conditioning compressor diode926
X1 onWiring connectorsVarious
X10Anti theft warning unit code837
X13Diagnostic link164, 165, 189, 190, 226, 270, 271, 258, 259,
309, 310, 370, 371, 343, 344, 473, 474, 573, 725, 836, 837, 860,
861, 1012, 1013, 1069, 1070, 1118, 1119, 1136, 1162, 1163
X15Octane number plug157, 158, 182, 183, 225, 226,
257, 258, 284, 285
X54Ignition coding plug310, 311, 1014, 1070, 1071
Y1Air conditioning compressor clutch925
Y4Headlamps washer solenoid valve620
Y5Fuel solenoid valve410, 445
Y7Fuel injection valves287 to 294,320 to 327,
384 to 391,1025 to 1032,1078 to 1089
Y10Hall sensor ignition distributor153 to 158
Y11Hot start solenoid valve375, 376
Y12Charging pressure control changeover valve377, 378
Y18Exhaust gas recirculation valve1093
Y23Inductive sensor distributor201 to 208
Y24Distributor (inductive discharge)
Y25Acceleration revolution solenoid valve155, 177
Y30Cold start acceleration solenoid valve 448
Y32Fuel injection valve212, 245
Y33Ignition distributor175 to 177, 268 to 270, 238 to 240,
301 to 303, 360 to 362
Y34Tank ventilation valve293, 331, 332, 379, 380,
1092, 1016, 1017,
Y35Circulation solenoid valve918
Y44Four wheel drive solenoid valve350
Y47Park brake shift lock lifting magnet469

9Where applicable, ensure that the glass
panel securing screw lockwashers engage
with the locating pins on the guide rails.
10Before fully tightening the glass panel
securing screws, close the panel, and adjust
its position to give the dimensions shown (see
illustration).
11If a new glass panel has been fitted, peel
off the protective foil on completion of
adjustment.
12Take care when refitting the guide rail
plastic surround, as it is fragile. Adjust the
open position of the glass panel as required to
fit the surround without damaging it.
Gutter
Removal
13Remove the glass panel, as described
previously in this Section.
14Extract the two securing screws (Allen or
Torx type), then lift the gutter from the roof
aperture.
Refitting
15Refit the gutter to the roof aperture at an
angle, pushing it up to the stop on both sides
until the retaining lugs engage with the gutter
guides.
16Refit and tighten the securing screws,
then refit and adjust the glass panel as
described earlier in this Section.
Sunshade
Removal
17Remove the glass panel and the gutter, as
described previously in this Section. 18Carefully prise the four sunshade spring
clips out of the roof guides using a plastic or
wooden implement to avoid damage, then
withdraw the sunshade from the guides (see
illustration).
Refitting
19Refitting is a reversal of removal, but
ensure that the spring clips engage correctly
with the roof guides.
Crank drive
Removal
20Prise out the trim and unscrew the crank
handle securing screw. Prise the crank from
the drive spindle.
21Disconnect the battery negative lead, then
prise the courtesy lamp from the roof trim
panel, and disconnect the wiring.
22Remove the two trim panel securing
screws, and withdraw the trim panel from the
roof (see illustrations).
23Extract the two securing screws, and
remove the crank drive assembly (see
illustration).
Refitting
24Refitting is a reversal of removal,
remembering the following points.
25Before finally refitting the crank handle,
the crank drive must be adjusted as follows.
26Temporarily refit the crank handle, and
position it so that it faces forwards, then
depress the locking button.
27Remove the crank handle and turn the
crank drive pinion anti-clockwise by hand as
far as the stop.
28Refit the crank handle so that it faces
directly forwards, then tighten the securing
screw and refit the trim.
35Interior trim panels -general
2
1The various interior trim panels are secured
by a variety of screws and plastic clips.
2Where press-fit plastic fasteners are used,
it is advisable to use a forked tool similar to
that shown to remove them, to avoid damage
to the clips and the trim panel (see
illustration).
3Removal and refitting of most of the trim
panels is self-explanatory but in all cases,
care must be taken, as the panels are easily
damaged by careless handling and the use of
sharp instruments to release clips.
36Interior trim panels -removal
and refitting
2
Sill trim panel
Removal
1When working on the passenger side of
models fitted with ABS, extract the three
securing screws and remove the cover from
the ABS control module. Note that two of the
screws are covered by plastic caps, which
must be prised out to expose the screws.
11•14Bodywork and fittings
34.22A Extract the securing screws . . .
35.2 Forked tool being used to remove clip
from rear seat back trim34.23 . . . to expose the crank drive -
securing screws arrowed34.22B . . . then withdraw the trim panel
from the roof . . .
34.18 Sunshade spring clip locations
(arrowed)
34.10 Sunroof glass panel fitting position

Refitting
10Refitting is a reversal of removal, but
where applicable, refit the sunroof crank drive,
as described in Section 34.
40Seats (without tensioners) -
removal and refitting
3
Front seats
Removal
1Remove the single securing screw from the
front edge of the outer seat rail trim, then
withdraw the trim (see illustration).2Unclip the trim from the rear edge of the
inner seat rail (see illustration).
3Remove the four bolts that secure the seat
rails to the floor, then withdraw the seat,
complete with rails. Recover the washers and
backplates (see illustration).
4If desired, the seat can be separated from
the rails for attention to the adjustment
mechanism.
Refitting
5Refitting is a reversal of removal. Note that
the manufacturers recommend the use of new
bolts to secure the seat rails to the floor.
Rear seat cushion (all SOHC
models)
Removal
6Fold the seat cushion forwards, to expose
the hinge pins at the front edge of the cushion.
7To remove a hinge pin, extract the circlip
from the end of the pin, and withdraw the pin
from the hinge (see illustration).
8With the hinge pins removed, the seat
cushion can be withdrawn from the vehicle.
Refitting
9Refitting is a reversal of removal.
Rear seat cushion (DOHC
models)
Removal
10Reach under the seat cushion, and pull
the grab handles at either end to release the
cushion from the catches on the vehicle floor.
11Withdraw the complete cushion from the
vehicle, through one of the rear doors.
Refitting
12Refitting is a reversal of removal. Push the
seat cushion into position until the securing
catches lock.
Rear seat back (one-piece type)
Removal
13Fold forwards or remove the rear seat
cushion, as applicable, then fold down the
seat back.
14Where applicable, bend up the lugs on the
body panel, and disconnect the two rubber
straps securing the ends of the seat back to
the body panel.
15Carefully remove the securing clips, and
pull back the trim covering the hinges on the
seat back.
16Extract the screws securing the hinges to
the seat back, then withdraw the seat back
from the vehicle.
Refitting
17Refitting is a reversal of removal, but
ensure that, where applicable, the rubber
strap securing lugs are bent back against the
body panel, to avoid fouling the seat cushion.
Rear seat back (split type)
Removal
18Fold forwards or remove the rear seat
cushion, as applicable.
19Where applicable, bend up the lug on the
body panel, and disconnect the rubber strap
securing the relevant section of the seat back
to the body panel (see illustration).
20Carefully remove the securing clips, and
pull back the trim covering the hinge on the
seat back.
21Extract the screws securing the hinge to
the seat back (see illustration).
22Working at the central pivot of the two
seat back sections, prise back the seat
cushions from the centre bracket, to expose
the securing nut and bolt. Note that the bolt
passes through both seat back sections (see
illustration).
23Unscrew and remove the nut and bolt,
then carefully withdraw the seat back.
Refitting
24Refitting is a reversal of removal, but
ensure that, where applicable, the rubber
strap securing lugs are bent back against the
body panel, to avoid fouling the seat cushion.
11•20Bodywork and fittings
40.1 Withdrawing the outer seat rail trim40.3 Removing a front seat rail securing
bolt, washer and backplate
40.7 Removing a rear seat cushion hinge
pin - SOHC models
40.21 Extracting a hinge-to-seat back
securing screw40.19 Seat back-to-body panel securing
strap and lug (arrowed)
40.2 Remove the trim from the rear edge
of the inner seat rail
Warning: Refer to Section 43, if
seat belt tensioners are fitted.

4B
4Clamp the fuel hoses on either side of the
damper, to minimise fuel loss when the hoses
are disconnected.
5Loosen the clamp screws, and disconnect
the fuel hoses from the damper. Be prepared
for fuel spillage, and take adequate fire
precautions.
6Unscrew the securing nut, and withdraw
the damper from the bracket.
Refitting
7Refitting is a reversal of removal.
8Run the engine and check for leaks on
completion. If leakage is evident; stop the
engine immediately, and rectify the problem
without delay.
19Throttle cable - removal,
refitting and adjustment
3
Removal
1This procedure is basically the same as
described in Chapter 4A, but note the
following.
2Not all models are fitted with an air box.
Ignore references to it, if not applicable.
3For “carburettor” substitute “throttle body”,
and note that the cable bracket is bolted to
the inlet manifold.
4The throttle cable end may connect to a
balljoint on the throttle valve lever, which is
retained by a clip (see illustration).
5If fitted, remove the air box. Refer to
Section 5, if necessary.
6Where fitted, use a pair of needle-nosed
pliers to extract the wire spring clip securing
the cable end balljoint to the throttle linkage.
Prise the cable end off the linkage.
7Withdraw the clip and pull the cable outer
seating grommet out of the cable bracket,
then release the cable as far as the bulkhead
(see illustration).
8Working inside the passenger
compartment, remove the driver’s footwell
trim panel, refer to Chapter 11, if necessary.
9Release the end of the cable’s inner wire
from the “keyhole” fitting at the top of the
throttle pedal by easing back the spring and
prising the cable end out of the slot.10Prise the grommet out of the bulkhead
and tie a length of string to the cable.
11Noting carefully its routing, withdraw the
cable through the bulkhead into the engine
compartment; untie the string, leaving it in
place, when the pedal end of the cable
appears.
Refitting
12Refitting is the reverse of the removal
procedure, noting the following points.
a)First ensure that the cable is correctly
routed, then draw it through the bulkhead
aperture using the string.
b)Ensure that the bulkhead grommet is
correctly seated.
c)Connect the cable end to the throttle
linkage. Seat the cable outer grommet in
the bracket and pull it through so that the
cable inner wire is just taut when the
throttle linkage is held fully closed. Fit the
clip to secure the cable outer in that
position.
d)Check the throttle operation and cable
adjustment, as described below.
Adjustment
13Refer to Chapter 4A, but for “carburettor”
substitute “throttle body”. If applicable, the air
box must be removed.
14First check that the pedal is at a
convenient height for the driver. This setting
can be adjusted by turning the pedal stop
screw (it will be necessary to remove the
footwell trim panel to reach the screw).
Remember that the pedal must be left with
enough travel for the throttle valve to open
fully. Also check that the pedal pivot bushes
are in good condition.
15Returning to the engine compartment,
check that the linkage pivots and balljoints are
unworn and operate smoothly throughout
their full travel. When the throttle valve is fully
closed and the throttle pedal is released, there
should be hardly any free play in the cable
inner wire.
16If adjustment is required, extract the clip
securing the cable outer seating grommet in
the cable bracket and replace it in the
appropriate groove, so that the cable outer is
repositioned correctly.17With an assistant operating the throttle
pedal from the driver’s seat. Check that when
the pedal is fully depressed, the throttle valve
is fully open. If there is insufficient pedal travel
to permit this, unscrew the pedal stop screw,
then reset the cable at the throttle linkage.
18When cable adjustment is correct, refit all
disturbed components.
20Idle mixture - checking and
adjustment
3
Note: No adjustment of idle mixture is
possible on models fitted with a catalytic
converter, and no adjustment of idle speed is
possible with the Motronic system. Refer to
Section 2 before proceeding. A tachometer
and an exhaust gas analyser (CO meter) will be
required to carry out adjustment on models
fitted with Motronic systems.
Multec systems
Checking
1If the CO level reading is incorrect (or if any
other symptom is encountered which causes
you to suspect a fault) always check first that
the air cleaner element is clean. Check also
that the spark plugs are in good condition and
correctly gapped. Ensure that the engine
breather and vacuum hoses are clear and
undamaged. Check that there are no leaks in
the air inlet trunking. Check the throttle body
and the manifolds for damage. Ensure that the
throttle cable is correctly adjusted (see Section
19). If the engine is running very roughly, check
the compression pressures (Chapter 2A) and
remember the possibility that one of the
hydraulic tappets might be faulty, producing
an incorrect valve clearance. Check also that
all wiring is in good condition, with securely
fastened connectors. Check that the fuel filter
has been renewed at the recommended
intervals and that the exhaust system is
entirely free of air leaks which might upset the
operation of the catalytic converter, if fitted.
Adjustment
2The idle mixture is controlled entirely by the
ECU and there is no provision at all for any
form of adjustment. Furthermore, accurate
checking is not possible without the use of
Vauxhall test equipment in conjunction with a
good-quality, carefully calibrated exhaust gas
analyser.
3While it may be possible for owners with
access to such analysers to check the
mixture, the results should be regarded as no
more than a rough guide. If the mixture is
thought to be incorrect, the vehicle should be
taken to a Vauxhall dealer for checking. If the
CO level exceeds the specified value the
system must be checked thoroughly by an
experienced mechanic using the Vauxhall test
equipment until the fault is eliminated and the
defective component renewed.
Fuel and exhaust systems - fuel injection models 4B•9
19.7 Throttle cable end grommet in
bracket on inlet manifold19.4 Disconnecting the throttle cable end
from the throttle valve lever - SOHC model

4Where applicable, the only test of the
catalytic converter’s efficiency is to check the
level of CO in the exhaust gas. This is
measured at the tailpipe with the engine
running (with no load) at 3000 rpm. If the CO
level exceeds the specified value, the Vauxhall
test equipment must be used to check the
entire fuel injection/ignition system. If the
engine is mechanically sound, once the
system has been eliminated, the fault must lie
in the converter, which must be renewed.
Motronic systems
Checking
5In order to check the idle mixture adjustment,
the following conditions must be met:
a)The engine must be at normal operating
temperature
b)All electrical consumers (cooling fan,
heater blower, headlamps etc.) must be
switched off
c)The spark plug gaps must be correctly
adjusted see Chapter 1
d)The throttle cable free play must be
correctly adjusted - see Section 19
e)The air inlet trunking must be free from
leaks, and the air filter must be clean
Adjustment
6Connect a tachometer and an exhaust gas
analyser to the vehicle in accordance with the
equipment manufacturer’s instructions.
7Start the engine and turn it at 2000 rpm for
approximately 30 seconds, then allow it to
idle. Check that the idle speed is within the
specified limits. No adjustment of idle speed
is possible, and if outside the specified limits,
the problem should be referred to a dealer.
8With the idle speed correct, check the CO
level in the exhaust gas. If it is outside the
specified limits, adjust by means of the idle
mixture adjustment screw in the airflow meter
or air mass meter, as applicable. In
production, the screw is covered by a
tamperproof plug; ensure that no local or
national laws are being broken before
removing the plug.9If the cooling fan cuts in during the
adjustment procedure, stop the adjustments,
and proceed when the cooling fan stops.
10When the idle mixture is correctly set,
stop the engine and disconnect the test
equipment.
Simtec systems
11Adjustment is not possible on these
models.
21Fuel pressure regulator -
removal and refitting
3
Note:Refer to Section 2 before proceeding
Removal
SOHC models (except Multec systems)
1Disconnect the battery negative lead.
2For improved access, remove the idle
speed adjuster as described in Section 22.
Disconnect the wiring harness housing from
the fuel injectors and move it to one side,
taking care not to strain the wiring. Pull up on
the wiring harness housing, and compress the
wiring plug retaining clips to release the
harness housing from the injectors.
3Position a wad of rag beneath the pressure
regulator, to absorb the fuel that will be
released as the regulator is removed.
4Loosen the clamp screws and disconnect
the fuel hoses from the regulator. Be prepared
for fuel spillage, and take adequate fire
precautions.
5Disconnect the vacuum pipe from the top
of the pressure regulator and withdraw the
regulator.
SOHC models (with Multec system)
6Depressurise the fuel system, as described
in Section 8.
7Remove the air box. Refer to Section 5, if
necessary.
8Disconnect the battery earth lead.9Noting the dowels locating the cover,
carefully unscrew the fuel pressure regulator
cover Torx-type screws (size TX 15). Ensure
that the spring does not fly out as the cover is
released. Remove the cover spring seat,
spring and diaphragm, noting how each is
fitted (see illustration).
10The diaphragm must be renewed
whenever the cover is disturbed. If any of the
regulator’s other components are worn or
damaged, they can be renewed only as part
of the throttle body upper section assembly.
DOHC models
11Disconnect the battery negative lead.
12Disconnect the wiring plug from the air
mass meter. Recover the sealing ring.
13Loosen the clamp screw securing the air
trunking to the right-hand end of the air mass
meter.
14Using an Allen key or hexagon bit,
unscrew the four bolts securing the air box to
the throttle body. Lift the air box from the
throttle body and disconnect the hose from
the base of the air box, then withdraw the air
box/air mass meter assembly.
15Disconnect the two breather hoses from
the rear of the camshaft cover, and move
them to one side.
16Disconnect the wiring plug from the
throttle position sensor.
17Disconnect the vacuum pipe from the top
of the pressure regulator (see illustration).
18Position a wad of rag beneath the
regulator, to absorb the fuel that will be
released as the regulator is removed.
19Using a spanner or socket, and working
underneath the regulator, unscrew the four
Torx type securing bolts, then withdraw the
regulator. Be prepared for fuel spillage, and
take adequate fire precautions.
Refitting
20Refitting is a reversal of removal, ensuring
that all wires, pipes and hoses are correctly
reconnected. Note that on DOHC models, the
4B•10Fuel and exhaust systems - fuel injection models
21.17 Fuel pressure regulator (arrowed) - DOHC model21.9 Fuel pressure regulator cover
A Locating dowels B Mounting screws

regulator vacuum pipe should be routed over
the top of the camshaft cover breather hoses.
21On models with the Multec system note
also the following:
a)Fit the new diaphragm so that it locates in
the throttle body groove.
b)Ensure that the spring and spring seat are
correctly engaged with each other and
with the diaphragm and regulator cover.
Then press the cover over its locating
dowels and hold it in place while the
screws are tightened.
c)Tighten the screws carefully to the
specified torque wrench setting.
22On completion, check the regulator for
leaks, pressurising the system by switching
the ignition on and off several times, before
the engine is started.
22Idle speed adjuster - removal
and refitting
3
Note:Idle speed adjustment on models fitted
with Multec systems, is not possible, as it is
controlled by the ECU. Refer to Section 1.
Removal
SOHC models (except Multec system)
1Disconnect the battery negative lead.
2Disconnect the wiring plug from the idle
speed adjuster (see illustration).
3The adjuster can be removed complete with
its connecting hoses, or separately, leaving
the hoses in place.4Loosen the relevant clamp screws, then
disconnect the hoses, and withdraw the idle
speed adjuster (see illustration).
DOHC models
5Disconnect the battery negative lead.
6Loosen the clamp screw, and disconnect
the hose from underneath the air box on the
throttle body. Remove the clamp from the
hose.
7Apply the handbrake, then jack up the front
of the vehicle, and support securely on axle
stands (see “Jacking and Vehicle Support”)
placed under the body side members.
8Remove the engine undershield, as
described in Chapter 11.
9Working underneath the vehicle,
disconnect the wiring plug from the idle speed
adjuster, which is located underneath the inlet
manifold above the starter motor (see
illustration).
10Loosen the clamp screw and disconnect
the remaining idle speed adjuster hose from
the inlet manifold, then withdraw the adjuster
downwards complete with the hoses.
11If the hoses are to be removed from the
adjuster, mark their locations before removal
so that they can be correctly reconnected.
Once the adjuster has been refitted, it is
impossible to swap the hose positions.
Refitting
12Refitting is a reversal of removal. On
DOHC models ensure that the idle speed
adjuster rests horizontally, with the wiring
routed over the top of the coolant hose. If thewiring is routed under the coolant hose, this
may cause the idle speed adjuster to be bent
downwards, resulting in a restriction or
fracture in the air hose to the inlet manifold.
23Throttle position sensor -
removal and refitting
3
Removal
SOHC models
1Disconnect the battery negative lead.
2Disconnect the wiring plug from the throttle
position sensor (see illustration).
3Remove the two securing screws and
withdraw the sensor from the throttle body
(see illustration).
DOHC models
4Disconnect the battery negative lead.
5Disconnect the wiring plug from the air
mass meter. Recover the sealing ring.
6Loosen the clamp screw securing the air
trunking to the right-hand end of the air mass
meter.
7Using an Allen key or hexagon bit, unscrew
the four bolts securing the air box to the
throttle body. Lift the air box from the throttle
body, and disconnect the hose from the base
of the air box, then withdraw the air box/air
mass meter assembly.
8Disconnect the wiring plug from the throttle
position sensor wiring plug (see illustration).
Fuel and exhaust systems - fuel injection models 4B•11
22.9 Idle speed adjuster (arrowed) viewed
from underneath vehicle -
DOHC model
23.8 Disconnecting the throttle position
sensor wiring plug - DOHC model23.3 Removing a throttle position sensor
securing screw - SOHC early model23.2 Disconnecting the throttle position
sensor wiring plug - early SOHC models
22.4 Withdrawing the idle speed adjuster
complete with hoses - SOHC model
(except with Multec systems)22.2 Disconnecting the idle speed adjuster
wiring plug - SOHC models (except with
Multec systems)
4B