JAGUAR XJ6 1994 2.G Electrical Diagnostic Manual

Rear view mirror position adjustments
1. Locate mirror select switch on driver's door switch pack and select driver's side mirror, ie
rotate switch towards the door.
2. Locate rear view mirror joystick switch on driver's door pack.
Operate the switch to give left
/ right and up / down movement. Does the mirror respond
in the correct manner?
3. Yes: Proceed to step 4 or 5.
No:
Japanese market vehicles only
Operate the switch to action 'fold away mode'. Does mirror respond in the correct manner
in each case?
Yes: Proceed to step
5.
No:
All markets
Operate mirror select switch to opposite position and repeat steps
1 to 4 for passenger side
mirror.
With ignition switched to auxiliary, select reverse gear and operate mirror joy
-stick
downwards. Does passenger side mirror dip automatically?
Yes: Proceed to step
7.
No:
Remove key from ignition, close driver's door and allow 30 seconds to elapse. Repeat
steps
1 - 6 and check that adjustment cannot be made.
Test complete; proceed to Memory Position Set.
Abort
test and refer to Diagnostic Sub
-Routines.
4.
Abort test and refer to Diagnostic Sub-Routines.
5.
6.
Abort test and refer to Diagnostic Sub-Routines.
7.
8.
Memory set position - drivefs side
1.
2.
3.
4.
5.
6.
7.
8.
Position the entry / exit switch, located on the LH side of the steering column, to off and
insert the key in the ignition.
Operate switches to position column, mirrors and seats to preferred positions.
Select 'memory' on the driver's door switch pack. Check that switch illuminates.
Depress desired memory button,
1,2 or 3, on door switch pack within 4 seconds of
memory select. Check that a chime sounds to confirm memory storage.
Operate the switches
so that memorized positions are changed. Depress relevant memory
option button,
1,2 or 3 and check that all positional settings are restored as memorized.
Remove key from ignition, close all doors and allow
30 seconds to elapse. Repeat steps 1
to 4 and check that adjustment cannot be made.
Readjust settings so that memorized positions are changed, leave the vehicle and operate
remote memory recall by locking and unlocking using the remote transmitter. Use both
transmitters to check both memory positions. Check all positional settings are restored as
memorized.
Yes: Proceed to step
8.
No:
Test complete. Abort
test and refer to Diagnostic Sub
-Routines.
X300 EDM Issue 1 August 1994 15.4 - 14

Carry out the passenger seat position adjustments procedure below under each of the conditions stated below:
Key in ignition barrel
. Passenger's door open
. Passenger's closed within the last 30 seconds
0 . Auxiliary ON
Passenger seat position adjustments
1.
2.
3.
4.
5.
0
6.
7.
8.
Locate seat switch pack on the side of the seat cushion.
Operate the fore
/ aft movement control switch. Does the seat respond in the correct manner?
Yes: Proceed to step
3.
No:
Operate front and rear, raise / lower movement control switches. Does seat respond in the
correct manner in each case?
Yes: Proceed to step
4.
No:
Operate squab recline / incline movement control switch. Does squab respond in correct
manner?
Yes: Proceed to step
5.
No:
Operate lumbar pump inflate / deflate control switch. Does lumbar pad stiffen and slacken
accordingly?
Yes: Proceed to step
6
No:
Operate headrest raise / lower switch. Does headrest respond in correct manner?
Yes: Proceed to step
7.
No:
Remove key from ignition, close passenger's door and allow 30 seconds to elapse. Repeat
steps
1 - 6 and check that adjustment cannot be made.
Test complete; proceed to Memory Position Set
Abort
test and refer to Diagnostic Sub
-Routines.
Abort test and refer to Diagnostic Sub
-Routines.
Abort test and refer to Diagnostic Sub
-Routines.
Abort test and refer to Diagnostic Sub
-Routines.
Abort test and refer to Diagnostic Sub
-Routines.
Memory
set position - passenger's side
1.
2.
0 3.
4.
5.
6.
7.
0
Insert the key in the ignition.
Operate switches to adjust seat to preferred positions.
Select 'memory' on the passenger's door switch pack. Check that switch surround
i I I um i nates.
Depress desired memory button,
1,2 or 3, on door switch pack within 4 seconds of
memory select. Check that
a chime sounds to confirm memory storage.
Operate the switches
so that memorized positions are changed. Depress relevant memory
option button,
1, 2 or 3 and check that all positional settings are restored as memorized.
Yes: Proceed to step
6.
No:
Remove key from ignition, close door and allow 30 seconds to elapse. Repeat steps 1 - 4
and check that adjustment cannot be made.
Test complete. Abort
test and refer to Diagnostic Sub
-Routines.
X300 EDM 15.4 - 15 Issue 1 August 1994

Electrical rl
Carry out the exit 1 entry mode procedure below under the conditions stated below:
. Key in ignition barrel
. Driver's door closed
. Auxiliary ON
. Park brake ON
. Gear selector in Park.
Exit 1 Entry Mode
1.
2.
3.
From the driver's seat, position the memory mode switch, located on the LH side of the
steering column, to auto.
Operate the seat, column and mirror switches to preferred driving position.
Note:
Remove key from ignition. Check that seat moves backwards and column tilts upwards
and away, creating maximum space for exit.
Yes: Proceed to step
4.
No:
Seat must be a minimum of 50mm from rear end stop.
Abort test and refer to Diagnostic Sub
-Routines.
4.
5.
3.
Refit key in ignition, open driver's door. Check that seat moves backwards and column tilts
upwards and away, creating maximum space for exit.
Yes: Proceed to step
5.
No:
Leave key in ignition and exit the vehicle, closing driver's door. Ensure that column and
seat return to driving position. Re-enter vehicle and ensure that column and seat move to
entry position. Close door and check that seat
/ column return to previously selected
driving positions.
Yes: Test complete.
No: Refer to Diagnostic Sub-Routines.
Abort
test and refer to Diagnostic Sub
-Routines.
Seat heaters (driver and passenger)
1.
2.
Turn ignition ON and locate heater select switch on the center console.
Operate the switch to initiate seat heating. Does the switch surround illuminate?
Yes: Proceed to step
3.
No:
Allow sufficient time for heater to take effect. Does seat heat level increase in all
designated areas?
Abort
test and refer to Diagnostic Sub
-Routines.
4.
5.
Yes: Proceed to step 4.
No:
Allow time span to exceed 12 minutes. Does switch surround light extinguish and heating
cease?
Yes: Proceed to step
5.
No:
Re-select heating, allow cycle to commence then operate switch again. Does switch
surround light extinguish and heating cease?
Yes: Test complete
No: Refer to Diagnostic Sub-Routines.
Abort
test and refer to Diagnostic Sub
-Routines.
Abort test and refer to Diagnostic Sub
-Routines.

Electrical rl
15.4.8 DlAG NOSTIC SUB-ROU T1 NES
0
The following information details possible fault conditions, causes and remedies. Detail test procedures for compo-
nents are covered in 'PIN-POINT TESTS' (Sub-Section 15.4.9).
Fault:
Possible causes:
Remedy:
Fault: Possible causes:
Remedy:
0
Fault:
Possible causes:
Remedy:
Fault:
Possible causes:
Remedy: Driver's
seat adjustment inoperative
1.
2.
3. Mechanical mechanism fault.
1.
2.
3.
No power supply to SCM.
Wiring harness or connectors faulty.
Check fuses
in 'A' post base fuse boxes.
Check harness and connectors between
SCM -fuse box,
SCM
-switch pack and SCM - motors.
Identify and repair mechanical faults.
Seat positional adjustment restricted
1.
2. Motor faulty.
3. Switch faulty.
4. Mechanical mechanism fault.
5. SCM faulty.
1.
2. Renew motor.
3. Renew switch pack.
4.
5. SCM faulty.
Harness
wiring or connector fault.
Examine wiring and connectors between SCM
- switch
pack and SCM
- motors.
Identify and repair mechanical faults.
Seat lumbar pump only inoperative
1.
2.
3. Motor faulty.
4. Switch faulty.
5. Mechanical mechanism
fault.
1.
2.
3. Renew motor.
4. Renew switch.
5. No
power supply to SCM.
Harness wiring or connector fault.
Check fuses in
'A' post base fuse boxes.
Examine wiring and connectors between SCM
- switch
pack and SCM
- motors.
Identify and repair mechanical faults.
Seat heaters only inoperative
1.
2.
3. Heater element faulty.
4. Heater thermostat faulty.
5. Heater switch faulty.
6. Body processor signal fault.
1.
2.
3.
4. Renew faulty switch.
5.
No power supply to SCM.
Wiring harness or connectors faulty.
Check fuses in
'A' post base fuse boxes.
Examine harness and connectors between SCM
- heater
circuit and SCM
- BPU.
Locate and renew faulty heater and thermostat unit.
Refer to BPU fault diagnosis.
X300 EDM 15.4 - 17 Issue 1 August 1994

Electrical IT
Fault:
Possible causes:
Remedy:
Fault: Possible causes:
Remedy:
Fault:
Possible causes:
Remedy:
Fault:
Possible causes:
Remedy:
Fault:
Possible causes:
Remedy: Steering
column positional adjustment inoperative
1. No power supply.
2. Wiring harness or connector fault.
3. Switch faulty.
4. Mechanical failure.
1. 2. Examine harness and connectors between S 1 CM -
3. Renew switch.
4.
Check fuses in 'A' post base fuse boxes.
fuse,
S I C CM - joy-stick switch and SI C CM - motors.
Identify and repair mechanical faults.
Steering column positional adjustment restricted
1. Wiring harness or connector fault.
2. Motor faulty.
3. Switch faulty.
4.
1.
2. Renew faulty motor.
3. Renew faulty switch.
4.
M echa n ica I mechanism fa i I u re.
Examine harness and connectors between
S 1 C CM -
motors and SI C CM and switch.
Identify and repair mechanical faults.
Rear view mirror positional adjustment inoperative or restricted
1. No power supply.
2.
3. Motor faulty.
4. Switch faulty.
5. Mechanical mechanism failure.
1.
2.
3. Renew faulty motor.
4. Renew faulty switch.
5.
Wiring harness or connector fault.
Check fuses in
'A' post base fuse boxes.
Examine harness and connectors between
S 1 C CM -
motors and SI C CM and switch.
Identify and repair mechanical faults.
Recall / Memory set facility inoperative or incorrect
1. Wiring harness or connector fault.
2. Potentiometers out of range or faulty.
3. Switches faulty.
1. Examine harness and connectors between SCM, S I C
CM and switches.
2. PDU only to check.
3. Renew faulty switches.
Exit \Entry facility inoperative or incorrect
1. Wiring harness or connector fault.
2. Potentiometers out of range or faulty.
3. Switch faulty.
1. Examine harness and connectors between SCM, S 1 C
CM and switches.
2.. PDU only to check.
3. Renew faulty switches. ~
Issue 1 August 1994 15.4 - 18 X300 EDM

15.4.9 PIN-POINT TESTS
The following tests give detailed information on component fault diagnosis. Refer to sub-section 15.4.9.16 for key to
schematic diagrams.
1. Seat power supply
a.
b.
Check fuses F3, F4, F9 and F12 in RH and fuse F6 in LH 'A' post base fuse boxes are
intact.
If blown determine reason for failure and renew.
Unplug harness connector from SCM and check for battery supply voltage to ground,
at pins 4,6,7 & 12 (B1 connector) and pin 11 (82 connector) with ignition on. If supply
is not recorded on all pins switch off ignition and check harness wiring continuity from
'A' post base fuse boxes to faulty lines as follows:
Connector B1
Pin 4 -fuse F 3, RH fuse box
Pin
6 -fuse F 4, RH fuse box
Pin
7 -fuse F 6, LH fuse box
Pin
12 -fuse F 9, RH fuse box
Connector 82
Pin 11 -fuse F12, RH fuse box
1 I
J86 - 1867
Fig. 1 SCM power supplies
Issue 1 August 1994 15.4 - 19 X300 EDM

n E I ectr ical
2A. Seat movement motors (memory seats)
a.
b.
Check motor operation is not obstructed, and that mechanical linkage is not damaged
or disconnected.
Examine wiring harness, checking continuity between SCM Connector
A1 and motor
unit connector pins as follows:
SCM Motor Function Unit Pin
Pin 8 Seat forward 1
Pin
7 Seat rearward 3
Pin 5 Seat rear raise 1
Pin
6 Seat rear lower 3
Pin 3 Seat front raise 1
Pin
4 Seat front lower 3
Check resistance between motor pins 1 and 3, a value of approximately 2S2 should be
indicated.
Check motor position potentiometer as described in test
4.
C.
d.
28. Seat movement motor (manual seats)
a.
b.
C.
d.
Check motor operation is not obstructed, and that mechanical linkage is not damaged
or disconnected.
Check continuity from motor connector pins (1
& 3) to each relay contact connector
(pin
3, raise relay, pin 8, lower relay) respectively.
Check power supply
(+12V) from LH 'A' post base fuse box, fuse F6, to seat switch
connector pin
9.
Check power supply (+12V) from RH 'A' post base fuse box, fuse F3, to pin 5, raise relay
connector and pin 10, lower relay connector.
Check continuity from switch pack connector pin
4 to raise relay connector pin 5 and
from switch pack connector pin 5 to lower relay connector pin
6
Check continuity to ground from raise relay connector pins 2 and 4 and lower relay
connector pins
7 and 9
e.
f.
3. Seat squab 1 headrest motors
a.
b.
Check motor operation is not obstructed, and that mechanical linkage is not damaged
or disconnected.
Examine wiring harness, checking continuity between SCM Connector
A1 and motor
unit connector pins as follows:
SCM Motor Pin
Pin 1 Squab recline 1 incline +ve 3
Pin 2 Squab recline 1 incline -ve 1
Pin 11 Headrest raise
1 lower +ve 1
Pin 12 Headrest raise
1 lower -ve 3
Check resistance between motor pins 1 and 3; a value of approximately 28 should be
indicated.
Check motor position potentiometers as described in step
4.
C.
d.
Issue 1 August 1994 15.4 - 20 X300 EDM

E I ect r ical
0
0
0
J86-1868
Fig. 1 Seat Motors
11
J86 - 1870
Fig. 2 Seat Motors (Manual)
X300 EDM 15.4 - 21 Issue 1 August 1994

n E I ect r ica I
4. Seat motor position potentiometers
a. Examine wiring harness, checking continuity between SCM Connector A2 and motor
unit connector pins as follows:
SCM Motor potentiometer Unit Pin
Pin 1 All units +ve 5
Pin 2 All units -ve 6
Pin 3 Headrest position 3
Pin 4 Squab position 3
Pin 5 Seat fore / aft position 3
Pin 6 Seat rear raise / lower position 3
Pin 7 Seat front raise / lower position 3
b. Check resistance of each motor position potentiometer pins 5 and 6; a value of
approximately IOW1 should be indicated.
Check resistance between motor position potentiometer pin
2 and both pins 5 and 6.
Values in the region of 10051 - 9.9W1 should be recorded, dependent upon motor
position.
C.
J86-18MI
Fig. 1 Seat Motor Potentiometers

Electrical
5. Seat lumbar pump
0 a. Check pneumatic circuit is intact and free from obstructions or blockages. Check
lumbar pad is not damaged or punctured.
b. Examine harness wiring, checking continuity between connector pins as follows:
Switch pack Pump Unit SCM
Pin 1
Pin 11
Pin
3
Pin 2
Pin 3
Pin 1
Pin 9 (connector AI)
C. Test pump resistance between unit pins 1 and 2; a value of approximately 2&2 should
be recorded. Check operation
of pressure switch by attempting to continually inflate
the lumbar pad. On achieving maximum pad pressure the pressure switch should
operate and switch
off the pump supply.
Test solenoid valve resistance between unit pins
3 and 2; a value of approximately 251
should be recorded.
d.
P11
10 1 I
I
I
I
I I I I I I I I I
I
I I II
Fig. 1 Seat Lumbar Pump
X300 EDM 15.4 - 23 Issue 1 August 1994