air condition JAGUAR X308 1998 2.G Workshop Manual

2.2. Switch OFF the ignition.
3. 3. Wait 10 seconds.
4. 4. Start the engine.
5. 5. Select R (reverse will be selected).
6. 6. Select D ( 2 will be selected).
The limp-home mode will be retained until the fault is remedied or the fault code has been erased. Intermittent faults may
be cleared by cycling the ignition OFF/ON. In certain cases the component may need to be operated before the fault code is
cleared eg. a shift solenoid.
Emergency Running (mechanica l/hydraulic limp-home mode)
Should slip be detected, due to a mechanical failure or loss of pressure, the transmission will either shift to, and hold 3 or
shift to, and hold, the last gear which was known to be alright. This condition may be cleared by cycling the ignition OFF/ON
following mechanical repair.
The operator will be made aware of certain faults by a warning message on th e instrument cluster.
Data concerning OBDII related transmission failures is stored in the ECM for access via the J1962 socket.
Safety Functions
These functions are designed to safeguard against inappropriate actions by the operator as well as system malfunctions.
The electrical and diagnostic system has been designed such that system integrity is protected at all times, the safety
concept being based on th e following three points.
1. 1. The hydraulic system has 'fail-safe' characteristics regardin g its electrical operation, such that should the power
supply be lost to the electro-hydraulic actuators the transmission will initiate a limp-home mode.
2. 2. Recognition of critical shift operation by monitoring the last element in the signal path, ie the solenoid valve, and
checking by means of redundant me asured variables relative to engine, transmission and road speeds.
3. 3. Each time the vehicle is started there is a check on the entire safety hardware and the associated program parts
and signal paths. A malfunction in this part of the system, or triggering of the safety circuit, is communicated to
the operator by a warning messag e on the instrument cluster.
CAUTION: Do not engage R or P with the vehicle in motion.
Should R be engaged with the vehicle in forward motion, the transmission will default to neutral until either the vehicle
speed decreases to 4 mph or D is selected.
Towing
The vehicle may be towed provided that:
Selector in position N Speed < 50 kph Distance < 50 km
System Functions
'J' Gate Layout

Pinpoint test B: P0740, P1744
With EM062 and EM061 disconnected, measure the voltage
between EM062/038 and EM061/030. 1
0V?
Yes GO to A6
No Inspect EM062, EM063, EM044 and EM061 for corrosion,
bent / pushed back pins or locate harness. Repair as
necessary and test the syst em for normal operation.
A6: END
Perform appropriate service drive cycle and check for the
presence of DTC. 1
Has the fault code cleared?
Yes
STOP
No Contact Jaguar Service
PINPOINT TEST B : P0740, P1744
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
B1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

Pinpoint test F: P0715
With EM062 and GB001 disconnected, measure the
resistance between GB001/012 and EM062/033 1
Is the resistance < 0.5 OHM?
Yes GO to E5
No Inspect EM062, EM044 and GB001 for corrosion, bent /
pushed back pins or locate harness. Repair as necessary
and test the system fo r normal operation.
E5: END
Perform appropriate service drive cycle and check for the
presence of DTC 1
Has the fault code cleared?
Yes
STOP
No Contact Jaguar Service
PINPOINT TEST F : P0715
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
F1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

Pinpoint test G: P1601
With EM062 and GB001 disconnected, measure the
resistance between GB001/001 and EM062/035 1
Is the resistance < 0.5 OHM?
Yes GO to F6
No Inspect EM062, EM044 and GB001 for corrosion, bent /
pushed back pins or locate harness. Repair as necessary
and test the system fo r normal operation.
F6: END
Perform appropriate service drive cycle and check for the
presence of DTC 1
Has the fault code cleared?
Yes
STOP
No Contact Jaguar Service
PINPOINT TEST G : P1601
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
G1: RETRIEVE DTCS
• NOTE: Following ECM power-down, the DTC will be lost and may only be displayed when the ignition is energized.

Pinpoint test D: P0140
Measure the insulation resistance between EM012/017 and
EM012/022. 1
Is the resistance > 10 MOHM?
Yes Reconnect all plugs
GO to C18
No Inspect harness / connector EM012 for corrosion, bent /
pushed back pins. Repair as re quired and reconnect plug(s).
GO to C18
C18: END
Perform appropriate service drive cycle and check for the
presence of DTC. 1
Has the fault code cleared?
Yes
STOP
No Contact Jaguar Service
PINPOINT TEST D : P0140
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
D1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

Pinpoint test E: P0151, P0152, P0155
Measure the insulation resistance between EM012/017 and
EM012/022. 1
Is the resistance > 10 MOHM?
Yes Reconnect all plugs
GO to D21
No Inspect harness / connector EM012, EM015 and EM022 for
corrosion, bent / pushed back pins.
Repair as required an d reconnect plug(s).
GO to D21
D21: END
Perform appropriate service drive cycle and check for the
presence of DTC. 1
Has the fault code cleared?
Yes STOP
No Contact Jaguar Service
PINPOINT TEST E : P0151, P0152, P0155
TEST CONDITIONSDETAILS/RESULTS/ACTIONS
E1: RETRIEVE DTCS
• NOTE: Battery and or ECM disconnection prior to scanning wi ll erase all data, ensure that the correct DTC is present.

Pinpoint test H: P0160
Me
asure the insulation resistance between EM012/016 and
EM015/001.
1
I s
the resistance > 10 MOHM?
Yes Reconnect all plugs.
GO to G20
No Inspect harness / EM012, EM 015 and EM024 for corrosion,
bent / pushed back pins . Repair as necessary.
GO to G20
G2 0: END
Perform a
ppropriate service drive cycle and check for the
presence of DTC.
1
Has th
e fault code cleared?
Yes STOP
No Contact Jaguar Service
PI
NPOINT TEST H : P0160
T
E
ST CONDITIONS
D
E
TAILS/RESULTS/ACTIONS
H1
:
RETRIEVE DTCS
•
NOTE
: Battery and or ECM disconnection prior to scanning wi
ll erase all data, ensure that the correct DTC is present.

W
ith conditions as A13, measure the insulation resistance

between EM013/001 and relay socket pin 5.
1
I
s the resistance > 10M OHM?
Yes GO to A16
No Inspect harness / connec tors EM013, EM003/005,
FC001/042, BT004/019, BT011/001, BT009/002 and
BT011/010 for corrosion, damage, bent or pushed back
pins. Repair as required and test the system for normal
operation.
A1
5: CHECK CORE TO CORE INSULATION

With
conditions as B13, meas
ure the insulation resistance
between EM013/009 and relay socket pin 5.
1
I
s the resistance > 10M OHM?
Yes GO to B16
No Inspect harness / connec tors EM013, EM051/008,
LS003/021, BT004/009, BT012/002, BT009/004 and
BT010/005 for corrosion, damage, bent or pushed back
pins and repair as required. Test the system for normal
operation
B1
5: CHECK CORE TO CORE INSULATION

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.