1994 JAGUAR XJ6 oil temperature

IW Automatic Transmission (AJ16)
TRANSMISSION FLUID TEMPERATURE SENSOR INPUTS P 0712 / P 0713
The transmission fluid temperature sensor is a positive temperature coefficient thermistor bead, located in the internal
wiring harness of the transmission assembly and immersed in the transmission fluid in the unit sump. The wiring is
taken out through the transmission connector and runs through the rotary switch and then into the gearbox harness
to the TCM. The pin outs on the relevant parts are as follows.
TCM ROTARY SWITCH TRANSMISSION
55 WAY CONNECTOR 12 WAY MULTI-LOCK 9 PIN DEUTSCH
(CC007) (GB002) (GB003)
PIN 46 - SIGNAL PIN 8 -SIGNAL PIN D -SIGNAL
PIN
44 -GROUND PIN 9 - GROUND PIN J -GROUND
TRANSMISSION FLUID TEMPERATURE SENSOR LOW INPUT- P 0712
This input is continuously monitored during initialization and operation by the processor and is checked against spe- cific limits to be in range. If the temperature indicated by the sensor is too low then this fault code will be stored and
the processor will use a substitute value for the transmission oil temperature.
The low limit is approximately
-50" C. This fault would indicate that the output signal line (Pin 46) is probably short
circuit to ground.
TRANSMISSION FLUID TEMPERATURE SENSOR HIGH INPUT- P 0713
This input is continuously monitored during initialization and operation by the processor and is checked against spe- cific limits to be in range. If the temperature indicated by the sensor is too high then this fault code will be stored and
the processor will use a substitute value for the transmission oil temperature. The high limit is approximately 185" C.
This fault would indicate that the input signal line (Pin 46) is probably open circuit or short circuit to battery positive
voltage (+I2 nominal).
Possible causes:
. Faulty sensor.
. Faulty harness wiring or connection to sensor.
Effects:
. Substitute oil temperature adopted by TCM.
Remedy:
Renew internal harness.
. Repair or renew harness I connectors.
Issue 1 August 1994 8 X300 EDM

Automatic Transmission (AJ16) w
8.1.5
nector.
TRANSMISSION CONNECTOR
(GB003)
TRANSMISSION ELECTRICAL PIN POINT TESTS
THE FOLLOWING TESTS describe methods of testing the transmission control solenoid valves from the multi-pin con-
0 A = Road Speed Sensor
0 B = Pressure Regulator
0 D = Oil Temperature Signal
0 F = Road Speed Sensor
0 H = MVI Solenoid
0 J = Oil Temperature Ground
0 K = MV2 Solenoid
0 L = MWVK Solenoid
0 M = Solenoid Supply
The solenoid valves are located on the valve block in the transmission assembly and can be identified by their position.
Connection is made via a connector located on the LHS of the transmission assembly.
Impedance Checks
M
-L)
M
-K) 28-60ohm
0 M-H)
M-B 5-70hm
M)(A
K)(D
L 1-( F O/C
H)(J
B)(
L-K)
L
- H ) 56- 120 ohm
K
-H)
L
-B)
K
-B) 33-67ohm
H
-B)
All Pins
- Ground OK
5
m- 1738
Fig. 1 Transmission Multi-plug Connector
X300 EDM 27 Issue 1 August 1994

Automatic Transmission (V12) Powertrain
Engine Speed
The engine speed is provided by an open collector signal supplied from the engine management control module
(ECM).
Throttle Position
This signal, from the ECM, performs the following two functions:
1.
2.
Engine Torque (and warm-up)
This signal, from the ECM, performs the following three functions:
1. During cranking to convey the completion of an engine warm
-up cycle to TCM.
2. To convey engine torque information, under normal running conditions, to TCM.
3. To convey engine torque fault signals to TCM.
Engine ‘warm
-up’ cycle commences from ignition ON until 500ms after the engine exceeds 400rpm. After this time
delay either an engine torque, or torque fault signal will be transmitted.
Transmission Input Speed
The transmission input speed sensor is mounted within the transmission housing and produces a variable frequency
signal, directly proportional to forward clutch housing rotational speed which is transmitted to the TCM. Sensor resis- tance equals 1.25kQ f 0.25.
Transmission Output Speed
The transmission output speed sensor is mounted within the transmission housing and produces a variable frequency
signal, directly proportional to the rear carrier rotational speed which is transmitted to the TCM. Sensor resistance
equals
1.25w2 + 0.25.
hake Application
When a brake application signal is received, due to brake switch operation, the torque convertor clutch lock-up sole- noid is de-energized, releasing lock-up mode if already applied
Transmission Oil Temperature
The transmission oil temperature sensor, located within the internal harness, monitors oil temperature and transmits a corresponding signal to the TCM.
To convey throttle position information to the TCM.
To indicate fault conditions between ECM and throttle potentiometer.
8.2.4.2 OUTPUTS
Gear Shift Solenoids
The two gear shift solenoids, located within the transmission housing, determine gear ratio when the selector is in any
of the forward gear positions.
Force Motor
The force motor, mounted within the transmission housing acts as a transmission torque fluid pressure regulator.
Torque Converter Clutch (TCC) Solenoid
The torque converter clutch solenoid, mounted within the transmission housing, provides a direct drive from the en- gine, via the converter clutch, to the driven wheels, giving the efficiency of a manual gearbox. The solenoid also pro- vides a ’ramp‘ apply and release to engage / disengage the clutch gently.
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X300 EDM Issue 1 August 1994 6

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
0
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 n
15.2 INSTRUMENTS
15.2.1 Introduction
The instrument pack is a self-contained, removable unit, which incorporates all the main display gauges and warning
indicators that are used to present vehicle condition information. The instrument pack is programmed during vehicle
build, to match the vehicle's individual requirements using 'Programmable Electronic Control Units System'
(PECUS). This is achieved via the diagnostic communication line, and therefore, should be renewed like-for-like. The primary
function of the instrument display is to provide the driver with information usual to normal driving requirements. The
secondary function is to display trip computer information.
The trip computer functions are selected via the steering column stalk switch
(LH). The messages are displayed in the
following order:
Odometer
- Distance - Range - Fuel Used -Average Fuel -Average Speed - Instant Fuel - Odometer (return).
Two trip computer switches, 'Reset' and 'Odo', are incorporated into the facia switch panel.
Instrument pack information is received from sensors positioned
at various locations about the vehicle (Fig. 1, follow-
ing page) via one of the two multi-pin sockets located at the rear of the instrument pack.
Information concerning vehicle condition and operation is displayed in one of three ways:
0 Information necessary to confirm normal vehicle operation: road speed, engine speed, oil pressure, battery
condition, fuel level, coolant temperature. This information is displayed using analogue gauges.
0 Information indicating the presence of a hazard/fault condition (low oil pressure/door open etc.) or operational
action (indicator flashing / headlamp full beam 'on' etc.). This information is provided by twenty two warning
lampsltell-tales, arranged in four groups; two groups of seven at the left and right sides of the instrument pack
and two groups of four
at the bottom of the instrument pack.
0 A Liquid Crystal Display (LCD) is located at the bottom-centre of the instrument pack and is normally used to
display the odometer reading, but it can also be used to display SRS fault conditions and trip computer informa-
tion such as vehicle speed, fuel usage and distance travelled.
0
X300 EDM 15.2 - 1 Issue 1 August 1994

Electrical rl
JOS 1776
1. Instrument Pack 7. Powerwash Relay
2. Body Processor Unit
(BPU) 8. Washer Fluid Level Sensor
3. Oil Pressure Sensor 9. Brake Fluid Level Sensor
4. Coolant Level Sensor 10. Ignition Switch 5. Coolant Temperature Sensor 11. Column Switch
6. Coolant Recirculation Pump Relay 12. Fuel Tank Level Sensor
Fig. 1 Component Location Diagram

Electrical IT
15.2.2 INSTRUMENT PACK CONNECTORS
0
Socket A (24-way)
Pin Circuit Input
1. Fuel used 2. 12V ignition feed 3. Ground 4. Ground 5. Battery feed 6. 12V auxiliary feed 7. Anti-lock fail 8. -
Socket 6 (48-way)
Pin Circuit Input
1. - 2. Speed output 1
3. Speed output 2
4. Trip stalk cycle 5. - 6. - 7- 8. - 9. Generator indicator voltage 10. Brake fluid level 11. - 12. Trip reset 13. Screenwash fluid level 14. Transmission sport mode 15. Seat belt 16. Luggage compartment open
Pin
9.
10.
11.
12.
13.
14.
15.
16.
Pin
17.
18.
19. 20.
21.
22.
23.
24.
25.
26.
27.
28.
29.
30.
31.
32.
Circuit Input
Illumination feed
-
- -
Diagnostic serial output (K) Diagnostic serial input (L)
Distance
-
Circuit Input
Park brake (on)
D.I.
bulb fail - - -
Check engine
Exhaust temperature
Main beam
- - - - - - - -
Fig. 1 Pin Locations
Pin
17.
18.
19.
20.
21.
22.
23.
24.
Pin
33.
34. 35.
36.
37.
38.
39. 40.
41.
42.
43.
44.
45.
46.
47.
48.
Circuit Input
-
Coolant temperature
Fuel level
Oil pressure
Coolant temperature output
Tachometer
input - ECM
-
Circuit Input
Ground - trip keyboard
Traction control status
Trip clear
Coolant level
Side lights (on)
Left D.I. (on)
Right D.I. (on)
Trip
km / miles
General bulb fail
Transmission fail
Air bag fail
Door ajar
- Driver’s
Door ajar - Passenger’s
-
X300 EDM 15.2 - 3 Issue 1 August 1994