1994 JAGUAR XJ6 Workshop Manual

1. SERVICE TOOLS & fQUlPMENT
Illustration
::(())(((((
Jaguar Number
JD 103
JD 161
Description Notes
Throttle valve alignment tool
Rotary switch setting tool
11. TORQUE TIGHTENING SPECIFICATIONS
Fixing Tightening Torque
(Nm)
Dipstick tube union nut 90
Drain plug 15
Fluid filter screws 8
Fluid pan securing bolts 8
Rotary switch to mounting bracket nuts
Transmission oil cooler pipes
20
10- 12
15- 18 Switch guard to sump pan bolts
111. SERVICE MA TERlA L S
Description USeS Notes
To be issued

Automatic Transmission (AJ16)
8.1.1 GENERAL DESCRIPTION
’ This section provides information relating to the automatic transmissionsfitted to the 3,2 liter engine (ZF 4 HP 22 trans- mission) and the 4,O liter normally aspirated engine (ZF 4 HP 24 E transmission). The general arrangement of the two
units is shown in Fig. 1 and Fig. 2. The two automatic transmission units differ in the type of control unit employed:
the purely hydraulic control used in the ZF 4 HP 22 unit shifts gears automatically at predetermined points, while the
electronic-hydrauliccontrol oftheZF 4 HP 24 E unit providesforoptimized shift point sand shift quality based on engine
and transmission data received by the Transmission Control Module (TCM).
P \R J44-607
1. Torque converter 8. Shift lever positions:
2. Throttle cable
‘P - Park
3. 4
-speed gear train ‘R‘ - Reverse
4. Output flange ‘N’ - Neutral
5. Transmission control unit
6. Oil outlet (drain plug) 9. Dipstick/ oil filler tube
7. Shift cable attachment 10. Oil cooler connection
‘D‘
- Drive - Fully automatic
control
Fig. 1 ZF 4 HP 22 Transmission
X300 VSM 1 Issue 1 August 1994

I 1 I
8-
/ /
7, 6
'4 '5
J4L- 688
1. Torque converter 6. Rotary switch positions:
2. &speed gear train 'P - Park
3. Output flange 'R' - Reverse
4. Transmission control unit 'N' - Neutral
5. Oil outlet (drain plug) 'D' - Drive
(Fully automatic control)
7. Dipstick/ oil filler tube
8. Oil cooler connection
Fig.
2 ZF 4 HP 24 E Transmission
X300 VSM Issue 1 August 1994 2

Automatic Transmission (AJ16)
Both types of automatic transmission comprise a hydrodynamic torque converter driving an epicyclic gear train which
provides four forward ratios and reverse. Gearshift selection is made by a hydraulic (or electronichydraulic) trans- mission control unit. Six gearshift positions are provided:
Position
'P' (Park) -the driven wheels are mechanically locked at the transmission.
Position
'R' (Reverse) - reverse gear selected.
Position
'N' (Neutral) - engine disconnected from drive-line and wheels.
Position 'D' (Drive)
- all four speed ranges are selected automatically with lock-up available in top gear only.
Position
'3' - automatic selection of the lowest three speed ranges only.
Position '2'
- automatic selection of the lowest two speed ranges only; the transmission is prevented from shift- ing up to the third and top speed ranges.
Immediate selection of a lower ratio is also available, within mapped limits, by 'kick
-down' (pressing the accelerator
pedal down beyond the normal full throttle position) for example when overtaking.
A brake pedal/gearshift interlock is incorporated in the shift lever mechanism. Theshift lever may only be movedfrom
the 'P' (Park) position if the ignition key switch is in position 'll', and the foot brake is applied. The ignition key cannot
be removed from the ignition switch unless the shift lever is in the 'P' (Park) position. Once the ignition key has been
removed, the shift lever is locked in the Park position. The gearshift interlock may be over-ridden manually in the event
of an electrical failure or when it is required to move the vehicle manually for access, ie for removal of the propeller
shaft.
8.1.1.1
Gearshift selection causes the appropriate gear to be selected through a cable operated shift lever on the side of the
Gear Selection (ZF 4HP 22)
transmission unit. When a gea; is selected, the shift points are determined by accelerator pedal position through a
throttle cable connection and by pressures equivalent to road speed derived from a centrifugal governor on the output
shaft.
Gearshift speed and quality are controlled by the hydraulic control unit located in the lower part of the transmission
housing. The control unit contains selector valve, control pistons and pressure valves.
The hydraulic control unit can be overridden by 'kickdown'. This is actuated by the final travel of the accelerator pedal
and causes the next lower gear to be selected.
8.1.1.2
Gearshift selection causes the appropriate gear to be selected through a cable operated shift lever on the side of the
transmission unit; the shift lever also operates a rotary switch attached to the side of the transmission unit. When a
gear is selected, the rotary switch provides an output or combination of outputs to the TCM, which continuously moni
- tors the gear selected in addition to output shaft speed and transmission oil temperature. Information from the Engine
Control Module (ECM) representing engine speed, load and throttle position is also fed to the TCM to enable the most
suitable gear to be selected.
Gear selection and gearshift speeds are controlled by the manually operated selector valve, a solenoid operated pres
- sure regulator and three solenoid valves. On receipt of signalsfrom the TCM, the three solenoid valves MVI, MV2 and
MV3, in various combinations with the safety valve, determine the appropriate gear range. The TCM, on receipt of
information of engine state and road speed, determines the shift speed.
The Performance Mode switch, located on the shift lever surround, provides two alternative shift speed patterns:
1. 'Normal (Economy) Mode' - designed for everyday use.
2. 'Sport Mode'
- gear shift takes place at higher road speeds to enhance performance.
The 'kick
-down' switch, located beneath the accelerator pedal, is actuated by the final travel of the pedal and signals
to the TCM that the next lower gear is to be selected.
Gear Selection (ZF 4 HP 24 E)
X300 VSM 3 Issue 1 August 1994

Automatic Transmission (AJ16)
8.1.1.3 Shift Speeds
3,2 Liter
Up to 'kickdown point' D4 - D3 D3 - D2
D2 - D1 -
km/h 102 - 114 67 - 78
36 - 50 -
- mile / h 64-71 42 - 48 22 - 31
'Kick-down' available D4 - D3 D3 - D2 D2 - D1
mile I h 86-99 61 -67 30 - 37 -
kmlh 139 - 160 98- 108 48 - 60 -
available speed) -
km/h 108- 123 - -
- - Manual inhibit (maximum D4 - D3 D3 - D2
- - mile 1 h NOT INHIBITED 67 -76
TCC
- Torque converter clutch
Issue 1 August 1994 4 X300 VSM

Automatic Transmission (AJ16)
Light throttle D1 -D2 D2 - 03 D3 - D4
Economy mile / h 10- 12 14-21 20 - 29
km/h 16 - 20 23 - 34 32 - 47
sport mile / h 10 - 16 16 - 24 25 - 33
kmlh 16 - 26 26 - 38 40 - 53
4,O Liter
D4 - TCC on
45 - 55
72
-88
49 - 59
79
- 95
Economy mile / h 34 - 38 57 - 64 88-98
km/h 55 - 61 91 - 103 141 - 157
110
- 119
km/h 69 - 77 117 - 130 176 - 191
Sport mile / h 43 - 48 73 - 81 88
-98
141
- 157
110-119
176 - 191
BOO VSM 5 Issue 1 August 1994
Through 'kick-down' point
Economy / mile / h 43 - 48
sport km/h 69 - 77 73
- 81 110- 119 110-119
117-130
176 - 191
176 - 191
Zero throttle D2 - D1 D3 - D2 D4 - D3
Economy mile / h NOT AVAILABLE 12 - 10 15 - 13
km/h 20- 16 24 - 21
sport mile / h 10-8 12 - 10 15 - 13
km/h 16- 13 20- 16 24 - 21
Up to 'kick
-down' point
Economy mile / h 21 - 19 52 - 47 86-77
sport
mile / h 30 - 27 72 - 65 109 - 99
km/h 34-31 ! 83-75
138 - 123
km/h 48-43 115- 104
175 - 159 D4
- TCC
on
49 - 39
79
- 63
52
- 39
83 - 63
86
-77
138
- 123
109 - 99
176
- 159
'Kick
-down' available
Economy / mile / h
sport
km/h
41 -35 73 - 64 107 - 95
107 - 95
66
-56 117-103 171 - 152
171 - 152
Zero throttle D2
- '1' D3 - '2'
Economy mile / h 41 -35 73 - 64
kmlh 66-56 117 - 103
sport mile / h 50 - 44 85 - 75
kmlh 80-71 136- 120 D4
- '3'
107
- 94
171
- 152
130
-114
208
- 182

bZF Automatic Transmission (AJ16) -
0
8.1.2 TRANSMISSION FLUID, RENEW
SRO 44.24.02
= Raise the hood and fit a fender cover.
. Raise the vehicle on a ramp.
. Place a drain tin in position beneath the transmission drain
Release and remove the transmission drain plug; allow
. Fit the drain plug with a new washer and torque tighten.
Reposition the drain tin beneath the dipstick tube union.
Remove the screw securing the dipstick tube bracket.
. Release the dipstick tube union nut and disconnect the
tube from the fluid pan.
. Drain the transmission fluid.
Clean the tube unions, reconnect the dipstick tube to the
. Lower the vehicle on the ramp.
. Remove the transmission dipstick.
. Renew the transmission fluid filter, see Subsection 8.1.6.
Fill the transmission with the correct fluid, see the ZF Auto-
Note: It will not be possible to get all the initial fill quantity
of fluid into the transmission.
. Refit the dipstick.
. Startthe engine, apply all brakes and run the transmission
With the engine still running, remove the dipstick.
Clean the dipstick and refit.
Remove the dipstick and check the transmission fluid
. Add fluid until the correct level is achieved.
. Stop the engine and refit the dipstick.
. Checkfluidleveltothe'HOT'marksaftera20mileroad run
(3,2L AND 4,OL)
Plug.
the fluid to drain.
fluid pan and torque tighten the union nut.
0
matic Transmissions Service Manual, General Data.
through
all gear positions and select 'Park'.
level. Remove the fender cover and lower the hood.
to ensure accurate results.
m
e
0
X300 VSM Issue 1 August 1994 6

Automatic Transmission (AJI 6)
8.1.3 TRANSMISSION CONTROL MODULE, RENEW
0 (4, OL)
SRO 44.15.32
. Raise the trunk lid and disconnect the battery.
. Remove the passenger side dash liner for access.
Displace and remove the air conditioning footwell outlet
duct.
. Release and remove the footwell carpet securing fastener:
displace and reposition the carpet for access.
Release the Transmission Control Module
(TCM) bracket
to body bracket securing nut
(1 Fig. 1).
. DisplacetheTCM mounting brackettang (2 Fig. 1)fromthe
body bracket and mounting stud.
= Reposition the TCM, release the TCM multi-pin plug lever
lock and disconnect the multi
-pin plug (3 Fig. 1).
. Release and remove the TCM mounting bracket securing
bolts and remove the TCM.
= Fit and align the new TCM to the mounting bracket.
. Fit and tighten the TCM securing bolts.
. Connect the TCM harness multi-pin plug and secure the
Position the TCM to body mounting bracket, ensuring that
Fit and tighten the TCM securing nut.
. Position the footwell carpet and fit the carpet fastener.
. Fit and align the footwell outlet duct to air conditioning
. Position and fit the duct fastener to the blower motor slot.
. Refit the dash liner.
. Reconnect the battery.
multi-pin plug lever lock.
the tang locates
in the bracket slot and stud.
unit.
1
i
J44-703 U
Fig. 1
Issue 1 August 1994 X300 VSM 7