1994 JAGUAR XJ light

ZF Automatic Transmissions Service Manual
Problem Possible Cause
1.3.6 Fault Finding Chart (continued)
Action
No changes at light throttle
setting
Change points incorrect at full
throttle setting
No changes at 'kick-down' - 1st
to 2nd 12nd to 1st
No changes at 'kick-down' - 2nd
to 3rd
13rd to 2nd Dirty
governor.
Shift valves sticking.
'Kick
-down' cable setting incorrect
'Kick
-down' cable setting incorrect
'Kick
-down' cable setting incorrect Renew
governor.
Service
1 renew valve block.
Adjust setting
Adjust setting
Adjust setting
Service
1 renew valve block.
Service
1 renew valve block.
Poor changes
Harsh changes at low throttle Throttle
valve ('kickdown') cable
, setting incorrect
I Defective damper.
Modulation pressure too high.
'Kick
-down' cable setting incorrect. I
j Clutch plates damaged.
!
Soft changes at full throttle and
'kick
-down' Defective damper.
'Kick-down' cable setting incorrect.
I
Adjust setting
Service
/ renew valve block.
Service
1 renew valve block.
Adjust setting
,
Service / renew transmission.
Service
/ renew valve block.
Adjust setting.
Adjust setting.
Harsh changes
at full throttle and
'kick
-down' Modulation
pressure too low.
Clutch plates damaged.
Incorrect modulation pressure.
'Kick
-down' cable setting incorrect.
Defective damper.
Manual change 3rd to 2nd faulty
No engine braking
36 Issue 1 August 1994
Locking valve '2' sticking. Service 1 renew valve
block I governor.
Service
/ renew valve block / governor.
Service
1 renew transmission
Governor faulty.
Brake 'C' or 'E' damaged

ZF Automatic Transmissions Service Manual
N
B
W
K
G
R
2.1.14 Rotary Switch Harness
Brown Y Yellow
Black
0 Orange
White
S Slate
Pink
L Light
Green
P Purple
Red
U Blue
Fig.
1 Transmission Connector (%way)
temperature
sensor
Color Code
I I /Indigo II I
Issue 1 August 1994 49

ZF Automatic Transmissions Service Manual
1B
28
3B
4B
58
6B
78
88
2.1.15 Main harness connectors - 12 way & 8 way
1 .o Solenoids output
1
.o MV1 solenoid
1
.o MV2 solenoid
1 .o MV WK solenoid
0.5 Pressure regulator
0.5 Start inhibit output
0.5 Start inhibit ground
0.5 Reverse lights output
Function /Pin 1::;2) [
Function /Pin I;::2) 1
U J44-704
6
12
Fig. 1 Main Harness Connector - 12 way
V J44-705
Fig. 2 Main Harness Connector - &way
Issue 1 August 1994 50

ZF Automatic Transmissions Service Manual
0
2.3.6 Fault Finding Chart (continued)
Problem
Uo upshift 3rd to 4th or
lownshift 4th to 3rd
Vo upshift 3rd to 4th
lownshift 4th to 3rd too hard
Manual gearshift D to 3rd too
lard
Manual gearshift 3rd to 2nd too
9ard
Vo 1st gear; 2nd gear start only.
No 1st or 2nd gear; 3rd gear
start only
No 2nd gear; transmission shifts
1st to 3rd gear
Light throttle gear change
speeds incorrect
Up to 'kick
-down' detent, gear
change speeds not to
specification
Possible Cause
Shift valve 3-4 seized.
MVl wire earthed.
MV1 faulty.
Speed sensor faulty.
'F'Clutch faulty
3rain orifice 'F' partially blocked.
Damper
'E' faulty.
Damper
'E' faulty.
Drain orifice
'F' partially blocked.
Damper
'Cl' faulty
Speed sensor faulty.
MV1 faulty.
MV1 wire earthed.
Shift valve 1
-2 seized.
'1st Gear Inhibit' circuit operated or
'Performance Mode' switch faulty.
Transmission 'Limp Home' mode.
Speed sensor faulty.
MV1 or MV2 faulty.
Shift valves 1
-2 and 2-3 seized.
Speed sensor faulty.
Shift valve 2
-3 seized.
Shift valves sticking.
Speed sensor faulty.
Throttle pot. volts incorrect.
Transmission Control Module
(TCM).
'Kick-down' switch out of adjustment
3enew valve block.
3enew harness.
Renew valve block.
Rectify or renew.
Renew transmission
Renew valve block.
Renew valve block.
Renew valve block.
Renew valve block.
Renew valve block
Check or renew speed sensor.
Renew valve block.
Renew harness.
Renew valve block.
Operate 'Performance Mode' switch
to correct function or renew switch.
Check Diagnostics
1 JDS.
Renew speed sensor.
Renew valve block.
Renew valve block.
Check or
recheck Diagnostics,
renew speed sensor.
Renew valve block.
Renew valve block.
Check or renew speed sensor.
Check voltage
- JDS.
Check TCM Diagnostics.
Readjust 'kick
-down' switch
Issue 1 August 1994 64

ZF Automatic Transmissions Service Manual
No engine braking
Manual gearchange 3rd to 2nd
inoperative Clutch 'Cl' or
Clutch 'E' faulty
Speed sensor faulty.
MV2 faulty.
a
Renew transmission
Check TCM Diagnostics
1 renew
speed sensor.
Renew valve block.
a
0
Problem
Vo 'kick-down' change
Light throttle speeds only
Light throttle gear change too
hard
1st to
2nd, 2nd to 3rd and 3rd to
4th changes too long
Full load and 'kick
-down'
changes too long
Full load and 'kick
-down'
changes too hard ~
Possible Cause
'Kick-down'
switch out of adjustment 1
full throttle stop adjustment.
'Kick
-down' switch faulty.
'Kick
-down' switch connector or wiring
Fa u Ity.
TCM faulty
Valve block bolt torque incorrect.
Modulation pressure too high.
Damper faulty.
Clutch plates faulty.
Valve block bolt torque incorrect.
Damper faulty.
PRSV faulty.
PRSV wire earthed.
Modulation valve seized.
Pressure regulator valves
1 and 2 seized.
mve block bolt torque incorrect.
Modulation pressure too low.
Clutch plates faulty.
Valve block bolt torque incorrect.
Modulation pressure too low.
Clutch plates faulty.
Action
Adjust as per Engine Set Up
procedure on JDS.
Renew 'kick
-down' switch.
Rectify.
Check TCM
Reset to correct torque.
Renew valve block.
Renew valve block.
Renew gear unit.
Reset to correct torque.
Renew valve block.
Renew valve block.
Renew harness.
Renew valve block.
Renew valve block.
Reset to correct torque.
Renew valve block.
Renew transmission.
Reset to correct torque.
Renew valve block.
Renew transmission.
issue 1 August 1994 65