1994 JAGUAR XJ6 Electrical Diagnostic Manual

Climate Control Systems
14.7.18 Fault Code 43
Cool Air Bypass Servomotor
The resistance between pins 1 and 3, motor Sway connector, should read 4.8 - 7.2 WZ.
If the resistance is outside of the set limits, renew the motor.
The motor operation can be checked by applying battery voltage to pin
5, motor Sway connector, and ground to pin
4 of the connector. The motor arm should rotate smoothly in a clockwise direction. Renew the motor if the arm does
not rotate smoothly.
Apply battery voltage to pin
4, motor Sway connector, and ground to pin 5. The motor arm should rotate smoothly
in a anti-clockwise direction. Renew the motor if the arm does not rotate smoothly.
Inspect the harness for open circuit or short circuit to ground. Rectify as necessary.
If no harness faults are apparent,
renew the AI CCM.
14.7.19 Fault Code 44
Servomotor
- Defrost
The resistance between pins 1 and 3, motor Sway connector, should read 4.8 - 7.2 kQ.
If the resistance is outside of the set limits, renew the motor.
The motor operation can be checked by applying battery voltage to pin
5, motor Sway connector, and ground to pin 4 of the connector. The motor arm should rotate smoothly in a clockwise direction. Renew the motor if the arm does
not rotate smoothly.
Apply battery voltage to pin
4, motor Sway connector, and ground to pin 5. The motor arm should rotate smoothly
in a anti-clockwise direction. Renew the motor if the arm does not rotate smoothly.
inspect the harness for open circuit or short circuit to ground. Rectify as necessary.
If no harness faults are apparent,
renew the A I CCM.
14.7.20 Fault Code 45
Servomotor
- Face
The resistance between pins 1 and 3, motor &way connector, should read 4.8 - 7.2 WZ.
If the resistance is outside of the set limits, renew the motor.
The motor operation can be checked by applying battery voltage to pin
5, motor Sway connector, and ground to pin 4 of the connector. The motor arm should rotate smoothly in a clockwise direction. Renew the motor if the arm does
not rotate smoothly.
Apply battery voltage to pin
4, motor 5-way connector, and ground to pin 5. The motor arm should rotate smoothly
in a anti-clockwise direction. Renew the motor if the arm does not rotate smoothly.
Inspect the harness for open circuit or short circuit to ground. Rectify as necessary.
If no harness faults are apparent,
renew the AI CCM.
14.7.21 Fault Code 46
Servomotor
- Foot
The resistance between pins 1 and 3, motor Sway connector, should read 4.8 - 7.2 WZ.
If the resistance is outside of the set limits, renew the motor.
The motor operation can be checked by applying battery voltage to pin
5, motor Sway connector, and ground to pin 4 of the connector. The motor arm should rotate smoothly in a clockwise direction. Renew the motor if the arm does
not rotate smoothly.
Apply battery voltage to pin
4, motor Sway connector, and ground to pin 5. The motor arm should rotate smoothly
in a anti-clockwise direction. Renew the motor if the arm does not rotate smoothly.
Inspect the harness for open circuit or short circuit to ground. Rectify as necessary.
If no harness faults are apparent,
renew the AI CCM.
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Issue 1 August 1994 22 X300 EDM

Climate Control Systems
14.7.22 BLOWER MOTORS
Disconnect the blower motors (LH & RH) multi-plugs and check motor operation by applying battery voltage (+12V) across pin 5 (+vel and pin 9 (-ve).
Non-functioning of both L H and RH motors *
Cause:
1. Loss of ignition voltage.
Remedy:
1.
2.
*
Examine fuse F12 in RH heelboard fuse-box. If fuse is blown determine reason for failure and renew.
Examine harness wiring from
RH heelboard fuse-box connection CA044/010 to splice CAS53. Repair or renew
wiring as necessary.
This fault will also affect the operation of seat control modules, power steering control module and door mirror
heaters.
Non-functioning of RH blower motor only
Cause:
1. Faulty relay operation.
2. Faulty harness wiring.
Remedy:
1. Ensure 12Vsupply between relay pin 1 and ground.
Ensure continuity between pins 3 and
5 when relay operated.
Ensure relay coil impedance of
7552 to 135Q across pins 1 and 2.
Ensure correct seating of relay on base. Examine pins for damage or deformity.
Check continuity of wiring from fuse F12
(RH heelboard fuse-box) to relay pin 1 and from relay pin 2 to A / CCM
pin 53 (26-way connector).
Check continuity of wiring from fuse
F11 (RH heelboard fuse-box) to relay pin 3, from relay pin 5 to motor pin 5, from motor pin 13 to A / CCM pin 41 (16-way connector), from motor pin 8 to ground and from motor pin 10 to A / CCM pin 42 (16-way connector).
2.
Non-functioning of L H blower motor only
Cause:
1. Faulty relay operation.
2. Faulty harness wiring.
Remedy:
1. Ensure 12V supply between relay pin 1 and ground.
Ensure continuity between pins 3 and
5 when relay operated.
Ensure relay coil impedance
of 7552 to 135Q across pins 1 and 2.
Ensure correct seating of relay on base. Examine pins for damage or deformity.
2. Check continuity of wiring from fuse F12 (RH heelboard fuse-box) to relay pin 1 and from relay pin 2 to A / CCM
pin 66 (26-way connector).
Check continuity of wiring from fuse
F11 (LH heelboard fuse box) to relay pin 3, from relay pin 5 to motor pin 5, from motor pin 13 to A / CCM pin 49 (16-way connector), from motor pin 8 to ground and from motor pin 10 to
A / CCM pin 50 (16-way connector).
X300 EDM 23 Issue 1 August 1994

Climate Control Systems r
High speed only - RH blower
Cause:
1. Faulty harness wiring.
2. Faulty power transmitter.
Remedy:
1. Check continuity of wiring harness between: blower motor pin 8 and ground. Pin 10 and A / CCM pin 42 (16-way connector). Pin 13 and A/ CCM pin 41 (16-way connector).
2. Check that voltage between pin 3 and ground varies with operation of fan speed control. Renew power transistor
if correct results not achieved.
High speed only - 1 H blower
Cause:
1. Faulty harness wiring.
2. Faulty power transmitter.
Remedy:
1.
2.
Check continuity of wiring harness between: Blower motor pin 8 and ground. Pin 10 and A/ CCM pin 49
(16-way connector). Pin 13 and A/ CCM pin 50 (16-way connector).
Check that voltage between pin 3 and ground varies with operation of fan speed control. Renew power transistor
if correct results not achieved.
Non functional high speed - RH blower
Cause:
1. Faulty high speed relay.
2. Faulty harness wiring.
Remedy:
1. Ensure correct seating of relay on base, examine pins for damage or deformity.
Ensure 12V supply relay pin
5 and ground.
Ensure continuity between relay pins 3 and
5 when the relay is operated.
Ensure relay impedance of
7552 to 13552 of across pins 1 and 2.
2.
Check continuity of wiring from relay pin 2 to A/ CCM pin 64 (26-way connector).
Check continuity of wiring harness between blower motor pin
8 and ground, pin 10 and A / CCM pin 42 (16-way connector) and pin 13 and A/ CCM pin 41 (16-way connector).
Non functional high speed - LH blower
Cause:
1. Faulty high speed relay.
2. Faulty harness wiring.
Remedy:
1. Ensure
correct seating of relay on base, examine pins for damage or deformity.
Ensure
12V supply relay pin 5 and ground.
Ensure continuity between relay pins 3 and
5 when the relay is operated.
Ensure relay impedance of
7552 to 13552 of across pins 1 and 2.
2. Check continuity of wiring from relay pin 2 to A/ CCM pin 65 (26-way connector).
Check continuity of wiring harness between blower motor pin
8 and ground, pin 10 and A / CCM pin 50 (16-way connector) and pin 13 and A / CCM pin 49 (16-way connector).
Issue 1 August 1994 24 X300 EDM

Climate Control Systems
High speed operation at all times - RH blower
a Cause:
1. Faulty high speed relay.
2. Faulty harness wiring.
Remedy:
1. Check the relay contact is not stuck 'ON'.
2. Check continuity of wiring harness between blower motor pin 8 and ground, pin 10 and A / CCM pin 42 (16-way connector) and pin 13 and A/ CCM pin 41 (16-way connector).
High speed operation at all times - LH blower
Cause:
1. Faulty high speed relay.
2. Faulty harness wiring.
Remedy:
1. Check the relay contact is not stuck 'ON'.
2. Check continuity of wiring harness between blower motor pin 8 and ground, pin 10 and A / CCM pin 50
(16-way connector) and pin 13 and A / CCM pin 49 (16-way connector).
14.7.23 Water Valve
For mechanical diagnosis of the water valve, refer to section 14 of the Vehicle Service Manual.
The solenoid coil fitted to the water valve housing has
a resistance of 17.4Q f 1P at 5 - 35 "C.
Check the continuity between pin 2 water valve white 2-way multi-plug and the A/ CCM (pin 52,26-way connector).
Check for ground
at pin 1 water valve white 2-way multi-plug.
14.7.24 Wafer Pump
Disconnect the black 2-way connector.
The motor operation can be checked by applying battery voltage to pin 1, motor 2
-way connector, and ground to pin 2.
Inspect the harness for open circuit or short circuit to ground. Rectify as necessary. If no harness faults are apparent,
renew the
A / CCM.
CAUTION: If removed the water pump should not be operated dry, and for a maximum of five minutes when wet. Failing to observe this may result in pump rotor and shaft damage.
The application of reverse polarity voltage at pins 1 and 2 will result in damage to the pumps internal cir-
cuitry.
X300 EDM 25 Issue 1 August 1994

E I ect r ica I rl
SECTION CONTENTS
m: For ease of access to the required information, this Section has been divided into four sub-sections with the
page numbers of each prefixed 15.1, 15.2, 15.3 or 15.4. Each subsection has its own contents list, and these
are given on the following pages
Sub-Section 15.1 Supplemental Restraint Systems
Subsection Title SRO Page
15.1 ............. Supplemental Restraint System .................................................... 15.1-1
15.1.1 ............ System Description .............................................................. 15.1- 1
15.1.2 ............ Component Descriptions ......................................................... 15.1- 7
15.1.2.1 .......... Diagnostic Module .............................................................. 7 5.1 - 7
15.1.2.2 .......... Wiring Harness ................................................................. 15.1-1
15.1.2.3 .......... AirBagModules ................................................................ 75.1-7
15.1.3 ............ Air Bag Disarming / Arming Procedure ............................................. 15.1-3
15.1.4
............ Diagnostic Module Fault Codes ................................................... 15.1-4
15.1.2.4 .......... ImpactSensors ................................................................. 15.7-2
X300 EDM i Issue 1 August 1994

Electrical IT
SECTION CONTENTS
Sub
-Section 15.2 lnsfrumenfs
Subsection Title SRO Page
15.2 ............. Instruments .................................................................... 15.2-1
15.2.1
............ Introduction .................................................................... 15.2-1
15.2.2
............ Instrument Pack Connectors - Pin Locations ......................................... 15.2-3
15.2.3
............ Component Description .......................................................... 15.24
15.2.3.1 .......... Speedometer ................................................................... 15.24
15.2.3.2 .......... Tachometer .................................................................... 15.24
15.2.3.3
.......... Engine Oil Pressure and Warning Lamp ............................................. 15.24
15.2.3.4 .......... Engine Coolant Temperature ...................................................... 15.24
15.2.3.5 .......... Fuel Tank Level Gauge and Warning Lamp .......................................... 15.24
15.2.3.6
.......... Battery Voltage Gauge and Warning Lamp .......................................... 15.24
15.2.3.7
.......... Liquid Crystal Display ........................................................... 15.24
15.2.3.8 .......... Trip Computer .................................................................. 15.2-5
15.2.4
............ Primary Warning Lamps (Illuminated Red) .......................................... 15.2-5
15.2.4.1
.......... Exhaust Temperature ............................................................ 15.2-5
15.2.4.2
.......... Low Oil Pressure ................................................................ 15.2-5
15.2.4.3
.......... Seat Belt ....................................................................... \
15.2-5
15.2.4.4
.......... Trunk Lid Open ................................................................. 15.2-5
15.2.4.5
.......... DoorAjar ...................................................................... 15.2-5
15.2.4.6
.......... Engine Coolant LeveL ............................................................ 15.24
15.2.4.7
.......... SRS Airbag Fault ................................................................ 15.24
15.2.4.8 .......... Charging Fault .................................................................. 15.24
15.2.4.9 .......... Brake System Fault .............................................................. 15.24
15.2.4.10 ......... Bark Brake ..................................................................... 15.24
15.2.5. ........... Secondary Warning Lamps (Illuminated Amber) ...................................... 15.2-7
15.2.5.1
.......... Transmission Fault ............................................................... 15.2-7
15.2.5.2
.......... Washer Fluid Level .............................................................. 15.2-7
15.2.5.3
.......... Bulb Fail ....................................................................... \
15.2-7
15.2.5.4
.......... Traction Control Fail ............................................................. 15.2-7
15.2.5.5
.......... Anti-lock Fail .................................................................. 15.2-7
15.2.5.6
.......... Low Fuel Level ................................................................. 15.2-7
15.2.5.7
.......... Check Engine ................................................................... 15.2-7
15.2.6.1
.......... Transmission Sport Mode ......................................................... 15.2-8
15.2.6.2
.......... Traction Control OFF ............................................................ 15.2-8
15.2.6.3
.......... Direction Indicators ............................................................. 15.2-8
15.2.6.4
.......... Main Beam .................................................................... 15.2-8
15.2.6
............ Status
and Warning Lamps ........................................................ 15.2-8
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X300 EDM ii Issue 1 August 1994

Electrical IT
SECTION CON TENTS
Subsection 15.2 Instruments (continued)
Sub-Section Title SRO Page
15.2.7 ............ Fault Diagnosis ................................................................. 15.2-9
15.2.7.1
.......... Active High /Low Inputs ......................................................... 15.2-9
15.2.8.
........... Instrument Pack Pin-point Tests .................................................. 15.2-1 0
15.2.8.1 .......... Oil Pressure, Battery Condition, Coolant Temperature and Fuel Gauges ................. 15.2-1 0
75.2.8.2
.......... Speedometer .................................................................. 15.2-10
15.2.8.4
.......... Liquid Crystal Display .......................................................... 15.2-17
15.2.8.6
.......... Door Open Warning Lamp ...................................................... 15.2-12
15.2.8.7
.......... Exhaust Temperature Warning Lamp .............................................. 15.2-1 3
15.2.8.8 .......... Luggage Compartment Warning Lamp ............................................. 15.2-14
15.2.8.9
.......... Seat Belt Warning Indicator ...................................................... 15.2-1 5
15.2.8.3
.......... Tachometer ................................................................... 15.2-11
15.2.8.5
.......... Trip Computer ................................................................. 15.2-11
15.2.8.70
......... Park Brake Indicator ............................................................ 15.2-16
15.2.8.71
......... Main Beam Indicator ........................................................... 15.2-17
75.2.8.12
......... Direction Indicator Tell Tales ..................................................... 15.2-18
15.2.8.14
......... Washer Fluid Level Indicator ..................................................... 15.2-20
15.2.8.16
......... Brake Fluid Level Indicator ...................................................... 15.2-22
75.2.8.17
......... General Bulb Failure Indicator ................................................... 15.2-23
15.2.8.18
.........
75.2.8.19 .........
15.2.8.20 ......... Traction Control OFF Tell-tale .................................................... 15.2-24
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75.2.8.13 ......... Generator IND Voltage Indicator ................................................. 15.2-19
7 5.2.8.15 ......... Engine Coolant Level indicator ................................................... 15.2-2 1
Transmission Sport mode Indicator ................................................ 75.2-24
Traction Control Failure Warning Lamp
............................................ 15.2-24
15.2.8.21
......... Anti-lock Failure Warning Lamp .................................................. 15.2-24
15.2.8.22
......... Check Engine Warning Lamp .................................................... 75.2-24
Issue 1 August 1994 iii X300 EDM

Electrical rl
SECTION CON TENTS
Sub-Section 15.3 Speed Control
Subsection Title SRO Page
15.3 ............. SpeedControl .................................................................. 15.3-1
15.3.1
............ System Description .............................................................. 15.3-1
15.3.2.
........... Component Descriptions ......................................................... 15.3-1
15.3.2.1
.......... Electronic Control Module ........................................................ 15.3-1
15.3.2.2
.......... Speed Control Module Pins ....................................................... 15.3-3
15.3.2.3
.......... Vacuum Pump/Control Valve Unit ................................................ 75.3-3
15.3.2.4 .......... Pressure Release Valve ........................................................... 15.3-3
15.3.2.5
.......... Throttle Linkage and Bellows ..................................................... 15.34
15.3.2.6 .......... Brake and Clutch Pedal Switches .................................................. 15.3-4
15.3.2.7
.......... Speed Control Selection Switches .................................................. 15.34
15.3.3 ............ System Flowcharts .............................................................. 15.3-5
15.3.4
............ Diagnostic Subroutines ......................................................... 7 5.3-5
15.3.5
............ Pin Point Tests .................................................................. 15.3-7
X300 EDM iv Issue 1 August 1994