electrical JAGUAR X308 1998 2.G Workshop Manual

Automatic Transmission/Transaxle - 4.0L SC V8 - AJ26 - Diagnostic
Strategy
Diagnosis and Testing
Symptom Chart
Symptom Chart
Special Tool(s)

Digital multimeter

Generic scantool
SymptomPossible SourcesAction
DTC P0740 Torque converter clutch system
electricalHarness fault
Connector pins(s) bent , loose or corroded
*
*GO to Pinpoint Test A
*
DTC P0740 Torque converter clutch system stuck
onTorque converter clutch stuck on
*GO to Pinpoint Test B
*
DTC P1744 Torque converter clutch system stuck
offTorque converter clutch stuck off
*GO to Pinpoint Test B
*
DTC P0702 Transmission control system electricalHarness fault
High side switch (FET) fault
Connector pins(s) bent , loose or corroded
*
*
*GO to Pinpoint Test C
or D
*
DTC P0753 Shift solenoid A electricalHarness fault
Solenoid open circuit
Solenoid short
Connector pins(s) bent
, loose or corroded
*
*
*
*GO to Pinpoint Test C *
DTC P0758 Shift solenoid B electricalHarness fault
Solenoid open circuit
Solenoid short
Connector pins(s) bent
, loose or corroded
*
*
*
*GO to Pinpoint Test C *
DTC P0763 Shift solenoid C electricalHarness fault
Solenoid open circuit
Solenoid short
Connector pins(s) bent
, loose or corroded
*
*
*
*GO to Pinpoint Test C *
DTC P0748 Pressure control solenoid electricalHarness fault
Pressure regulator open circuit
Pressure regulator short
Connector pins(s) bent
, loose or corroded
*
*
*
*GO to Pinpoint Test D *
DTC P1748 Pressure control solenoid B electricalHarness fault
Pressure regulator open circuit
Pressure regulator short
Connector pins(s) bent
, loose or corroded
*
*
*
*GO to Pinpoint Test D *
DTC P0702 Transmission control system electricalHarness fault
Speed sensor voltage supply out of
tolerance Connector pins(s) bent , loose or corroded
*
*
*GO to Pinpoint Test E
*
DTC P0715 Input / turbine speed sensor circuit
malfunctionSpeed sensor n2 or supply open circuit
Speed sensor n3
Harness fault
Connector pins(s) bent , loose or corroded
*
*
*
*GO to Pinpoint Test F
*
DTC P1601 Internal control module computer errorFaulty TCM
*GO to Pinpoint Test G *

Installation


13. Remove the valve body assembly.
Remove the nine bolts which re tain the valve body to the
transmission case.
1. Installation is the re verse of the removal procedure, noting the
following:
2. Clean all mating faces and relevant parts.

3. Tighten the nine bolts securing the valve body, to the specified
torque figure.

4. Refit the dowel (leaf spring to valve body) and the leaf spring.
Fit and tighten the securing bolt to the specified torque figure.
5. Tighten the centre retaining bolt of the electrical connector to
the specified torque figure.

4. Tighten the centre retaining bolt of the electrical connector
guide bush to 2.25 to 2.75 Nm.
5. Perform the Battery Reconnection Procedure described in
Operation 86.15.15.
6. Refer to Operation 44.24.02 for fluid fill procedure.
7. Check for leaks and remove spilt fluid.

Automatic Transmission/Transaxle External Contro ls - 4.0L SC V8 - AJ26 -
Transmission Control Switch (TCS)
Removal and Installation
Removal
Installation
1. Position the gear selector to 'N' to provide clearance for
removing the console.
2. Disconnect the vehicle battery ground lead.
3. Remove the J-gate surroun d, operation 76.25.24.
4. Remove the console finisher vene er panel, operation 76.47.26.
5. Remove the console assembly, operation 76.25.01.

6. Detach the selector cable from the gear shift assembly.
1. Remove the nut which secures the inner cable to the shift lever.
2. Slacken the outer cable locknuts. Move the cable clear.

7. Disconnect the electrical conne ctor from the linear switch.
8. Position the selector to 'P' to align the mechanism for installing
the new linear switch.

9. Remove the linear switch.
Remove the four screws.
Remove the linear switch fro m the mounting bracket.
1. Install the linear switch.
Position the linear switch to the mounting bracket.

Align the drive peg and lower sliding block of the switch to
the mating components of the selector mechanism.

2. Install the four screws, bu t do not fully tighten.
Remove the Ty-Strap from the dual linear switch.
Use the manual release and repo sition the selector to 'N'
for installation of the selector cable.

3. Connect the electrical connector to the linear switch.

4. Assemble the cable to the gear shift assembly.
1. Locate the outer cable and fit the inner cable to the gear selector arm. Tighten to 22-28 Nm.
2. Position the abutment nuts to the approximate position, but do not tighten.
5. NOTE: When setting the selector cable, ensure that the
selector lever on the transmission ca sing is still in the 'N' position.

Adjust the selector cable from inside the vehicle.
1. Confirm that the selector lever is in the 'N' position.
2. Adjust the nuts to lock against the bracket without

Filler Cap and P
ipe
The fuel
filler cap with bayonet-type fixi
ng is located beneath a remote-release sp ring-latched lid on the rear saddle panel
on the left-hand-side of the vehicle.
Fuel Pum
p
The fu
el pump(s) is energized by an ECM co
ntrolled relay. Fuel is drawn by this pu mp and supplied to the fuel injectors via
the fuel line, filter and fuel rails.
Servicing of the fuel pump re quires fuel tank removal.
Ev
aporative Loss Flange Assembly
The evaporative-loss flan
ge asse
mbly is mounted centrally on top of the tank. The flange assembly consists of a removeable
steel cap which mounts the evaporative emissions system vapor outlet valves and, if applicable, a pressure sensor. The
external electrical supply to th e fuel pump(s) is also made via a connector on the flange.
The flange assembly is fixed to the tank by a locking ring which is turned usin g special tool JD-174. A seal is fitted between
the flange assembly and the tank. Three di fferent flange assemblies are applicable according to the evaporative emission
system fitted to the vehicle. The fl ange size and fixing are identical fo r the three systems, as described.
Removal of the evaporative flange assembly is necessary to gain access to th e fuel pump(s) and other internal components.
To remove the evaporative fl ange assembly the fuel tank must first be removed.
The evaporative flange variant assemblies are described, together with service information, in Section 303-13.
Fuel R
eturn
Excess fuel
is directed back to
the fuel tank via a return line.
Fuel Pum
p Relay
The
fuel pump relay,
under control of the ECM, switches power to the fuel pump motor.
I
nertia Fuel Shutoff (IFS) Switch
The IF
S switch is located in the right-hand
side footwell behind the footboard carpet . When activated the switch isolates the
ignition system and fuel pump, releases any locked doors and disables unnecessary electrical systems. The system can be
reset by pressing down the flexible cover on the top of the switch.
• NOTE: The doors will not unlock if the IFS switch is tripped when the ignition switch is in position '0'.

Speed Control - Speed
Control
D
iagn
osis and Testing
Pri
n
ciples of operation
The s
p
eed (cruise) control sy
stem is activated by an ON/OFF master switch in the J-gate surround, which has an integral
LED to indicate status.
The steering wheel switches allow the driver to set the speed, increase or decrease the selected speed, cancel and resume
the facility without his/her hand ever leaving the steering wheel
The vehicle speed can be increased an d decreased in increments of 2 kmh (1 mph) by briefly pressing the + or - buttons up
to a maximum of five times.
Alternatively, the + or - button can be held until th e desired speed is reached.
The selected speed (by whichever method) w ill be displayed in the message center.
The system will not function at speeds below 26 kmh (16 mph), and can be cancelled from the master switch, the steering
wheel switches, and by depressing th e brake pedal. The system can be overridden by accelerating as normal.
In
spection and Verification
1.
1. Veri fy the customer concern.
2. 2. Vis
ually inspect for obvious signs of mechanical or electrical damage.
3. 3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding
to the next step.
4. 4. If the cause is not visually evident, verify the symptom, check for DTCs and follow the routines in this section.
Vi
sual Inspection Chart
Diagnostic Trouble Code (D
TC) index
MechanicalElectrical
Throttle body mechan
ism
Throttle body actuator
Module Switch(es) Instrument cluster
DTC

De
scr
iption
Possib
l
e Source
Acti
o
n
P0566Speed
c
ontrol
CANCEL
switch ON fault
Speed
control switches internal steering wheel
short circuit to ground
St
eering wheel cassette reel short circuit to
ground
Cassette reel to ECM circ
uit short circuit to
ground
CANCEL
switch failure (stuck ON)
Fo
r

CANCEL switch circuit
tests,GO to Pinpoint Test A.
P0567Speed c
ontrol
RESUME
switch ON fault
Speed
control switches internal steering wheel
short circuit to ground
St
eering wheel cassette reel short circuit to
ground
Cassette reel to ECM circ
uit short circuit to
ground
RESUME swit
ch failure (stuck ON)
For

RESUME switch circuit
tests,GO to Pinpoint Test B.
P0568Spee
d control switch
ground malfunction
Speed
control switches internal steering wheel
open circuit
St
eering wheel cassette reel open circuit or
high resistance
Cassette reel to ECM ci
rcuit open circuit or high

For

ACCEL/DECEL switch circuit
tests,GO to Pinpoint Test C.

Pinpoint test
s
re
sistance
ACCEL/DECEL
swi
tch failure
P0569Speed

control
DECEL/SET
(SET-) switch ON fault
Speed
control switches internal steering wheel
short circuit to ground
S
teering wheel cassette
reel short circuit to
ground
Cassette reel
to ECM ci
rcuit short circuit to
ground
DEC
EL/SET
switch failure (stuck ON)
Fo
r
DECEL/SET (SET-) switch
circuit tests,GO to Pinpoint Test D.
P0570Speed
control
ACCEL/SET
(SET+) switch ON fault
Speed
control switches internal steering wheel
short circuit to ground
S
teering wheel cassette
reel short circuit to
ground
Cassette reel
to ECM ci
rcuit short circuit to
ground
ACC
EL/SET
switch failure (stuck ON)
Fo
r
ACCEL/SET circuit tests,GO
to Pinpoint Test E.
P1571Brake sw
itch malfunction
Brake sw
itch to ECM circuit open circuit, short
circuit to ground, high resistance
Brake sw
itch ignition switched ground circuit
open circuit
Brake sw
itch failure
Brake ca

ncel switch to
ECM circuit open circuit,
short circuit to ground, high resistance
Brake ca
ncel switch to speed control switch
circuit open circuit, shor t circuit to ground, high
resistance
Brake ca
ncel switch ignition switched power
supply open circuit
Brake ca
ncel switch failure
Spe

ed control switch failure
For brake swi
tch circuit tests,GO
to Pinpoint Test F.
P
INPOINT TEST A : DTC P0566; SPEED
CONTROL CANCEL SWITCH ON FAULT
WAR
NING: Where tests involve the removal of the steering
wheel, and/or disconnection of air bag connectors, the
procedure for disarming air bags must be followed,
REFER to: Air Bag Supplemental Re straint System (SRS)

(501-20B Supplemental Restra
int System, Description and
Operation).
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
A1: CHECK

THE SPEED CONTROL SWITCHPACK IN
TERNAL CIRCUITS FOR SHORT TO GROUND
Di
sconnect the battery negative terminal.
1
Di

sconnect the speed control switch
pack electrical connector, SW02.
2
R
econnect the battery negative terminal.
3
Meas

ure the resistance between SW
02, pin 06 (BO) and GROUND.
4
Meas
ure the resistance between SW
02, pin 03 (SG) and GROUND.
5
Is either resi
stance
less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to A2
.
A2: CHECK
THE SPEED CONTROL CASSE
TTE REEL FOR SHORT TO GROUND
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM11.
2
R

econnect the battery negative terminal.
3
M

easure the resistance between SW02, pin 06 (at the cassette reel side of the connector) and
GROUND.
4
M
easure the resistance between SW02, pin 03 (at the cassette reel side of the connector) and
GROUND.
5
Is either resi
stance
less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.

No
GO to A3.
A3: CHECK THE SPEED CONTRO L CANCEL SWITCH
ACTION
Meas
ure t
he resistance between SW02,
pin 06 (BO) and SW02, pin 03 (SG).
1
Operate
the speed control
CANCEL switch.
2
Do
es the resistance
vary by 680 ohms?
Yes Recheck DTCs. No short found. Po ssible intermittent fault. CLEAR the DTC. TEST the system for
normal operation.
No INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
PINPOINT TEST B : DTC
P0567; SPEED
CONTROL RESUME SWITCH ON FAULT
WARN
ING: Where tests involve the removal of the steering
wheel, and/or disconnection of air bag connectors, the
procedure for disarming air bags must be followed,
REFER to: Air Bag Supplemental Re straint System (SRS)
(50
1-20B Supplemental Restra
int System, Description and
Operation).
TE S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
B1: CHECK
THE SPEED CONTR
OL SWITCHPACK IN
TERNAL CIRCUITS FOR SHORT TO GROUND
Disc
onnect the speed control switch
pack electrical connector, SW02.
1
Measure t
he resistance between SW
02, pin 06 (BO) and GROUND.
2
Measure t
he resistance between SW
02, pin 03 (SG) and GROUND.
3
Is either resistance le
ss than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to B2
.
B2: CHECK THE SPEED CONTR
OL CASSETTE REEL FOR SHORT TO GROUND
M
e
asure the resistance between SW02, pin 06 (at the cassette reel side of the connector) and
GROUND.
1
Me
asure the resistance between SW02, pin 03 (at the cassette reel side of the connector) and
GROUND.
2
Is either resistance le
ss than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to B3
.
B3: CHECK THE SPEED CONTR
OL RESUME SWITCH ACTION
Meas
ure t
he resistance between SW02,
pin 06 (BO) and SW02, pin 03 (SG).
1
Operate
the speed control
RESUME switch.
2
Do
es the resistance
vary by 430 ohms?
Yes Recheck DTCs. No short found. Po ssible intermittent fault. CLEAR the DTC. TEST the system for
normal operation.
No INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
PINPOINT TES
T C : DTC P0568; SPEED CONTROL SWITCH GROUND MALFUNCTION
WAR
N
ING: Where tests involve the removal of the steering
wheel, and/or disconnection of air bag connectors, the
procedure for disarming air bags must be followed,
REFER to: Air Bag Supplemental Re straint System (SRS)

(50
1-20B Supplemental Restra
int System, Description and
Operation).
TE S
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
C1: CHECK FOR CONTINUITY T
H
ROUGH STEERING WHEEL
CANCEL AND RESUME SWITCHES (SWITCHES OPEN)
Disc
onnect the speed control switch
pack electrical connector, SW02.
1
Check for c
ontinuity between SW02
, pins 06 (BO) and 03 (SG) wi th the steering wheel switches
inactive.
2

Is th
e circuit continuous?
Yes INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
No GO to C2
.
C2
: CHECK FOR CONTINUITY THROUGH STEERIN
G WHEEL CANCEL SWITCH (SWITCH CLOSED)
Check f
or continuity between SW02, pins 06
(BO) and 03 (SG) with the steering wheel CANCEL
switch operated.
1
Is th
e circuit continuous?
Yes GO to C3
.
No

INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
C3
: CHECK FOR CONTINUITY THROUGH STEERIN
G WHEEL RESUME SWITCH (SWITCH CLOSED)
Check f
or continuity between SW02, pins 06
(BO) and 03 (SG) with the steering wheel RESUME
switch operated.
1
Is th
e circuit continuous?
Yes GO to C4
.
No

INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
C4
: CHECK FOR CONTINUITY THROUGH STEERING
WHEEL + AND - SWITCHES (SWITCHES OPEN)
Chec
k for continuity between SW02
, pins 06 (BO) and 04 (SR) with the steering wheel switches
inactive.
1
Is th
e circuit continuous?
Yes INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
No GO to C5
.
C5
: CHECK FOR CONTINUITY THROUGH STEER
ING WHEEL + SWITCH (SWITCH CLOSED)
Check f
or continuity between SW02, pins 06
(BO) and 04 (SR) with the steering wheel CANCEL
switch operated.
1
Is th
e circuit continuous?
Yes GO to C6
.
No

INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
C6
: CHECK FOR CONTINUITY THROUGH STEER
ING WHEEL - SWITCH (SWITCH CLOSED)
Check f
or continuity between SW02, pins 06
(BO) and 04 (SR) with the steering wheel CANCEL
switch operated.
1
Is th
e circuit continuous?
Yes GO to C7
.
No

INSTALL a new speed control switchpack. CLEAR the DTC. TEST the system for normal operation.
C7: CHECK THE STEERING
WHEEL CASSETTE
REEL FOR CONTINUITY (CIRCUIT #1)
Di
sconnect the steering wheel cassette electrical connector, SW01.
1
Meas

ure the resistance between SW01, pin 06
and SW02, pin 06 through the cassette reel.
2
Is th
e cassette reel continuous?
Yes GO to C8
.
No

INSTALL a new steering wheel cassette. CLEAR the DTC. TEST the system for normal operation.
C8: CHECK THE STEERING
WHEEL CASSETTE
REEL FOR CONTINUITY (CIRCUIT 2)
Meas
ure the resistance between SW01, pin 03
and SW02, pin 03 through the cassette reel.
1
Is th
e cassette reel continuous?
Yes GO to C9
.
No

INSTALL a new steering wheel cassette. CLEAR the DTC. TEST the system for normal operation.
C9: CHECK THE ECM
TO CASSETTE REEL
CIRCUIT FOR CONTINUITY (CIRCUIT 1)
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM11.
2
Meas

ure the resistance between EM11, pin 01 (SR) and SW01, pin 04 (SR).
3