1994 JAGUAR XJ6 wiring

Automatic Transmission (AJ16)
TP ELECTRICAL SIGNAL SYSTEM - P 1791
If the throttle angle signal line is held permanently high or low for more than looms, then this fault will be recognised
and stored. The TCM will adopt the substitute throttle value and turn on the warning lamp. The fault code will only be
stored if the engine speed is greater than 400rpm.
TCM PI HARNESS ECM
CC007/047 P1063/00 1 PI 1041032
Possible causes:
Faulty harness wiring I connection.
. Faulty ECM signal.
Effects:
Transmission warning lamp illuminated.
. MIL illuminated.
Normal mode only available.
Substitute throttle angle adopted.
No kickdown facility.
Remedy:
Repair or renew harness 1 connector.
Examine ECM fault diagnosis (refer to EDM, Section 5.1).
TP SIGNAL SYSTEM RANGE/ PERFORMANCE - P 1790
The throttle signal is a pulse width modulated (pwm) input which runs at a constant frequency of 183 Hz the information is contained in the duty cycle of the signal. If this information is out of range, that is, the duty cycle is less than 5% or
greater than 94%, then the TCM will use a substitute throttle value of 47% and will light the warning lamp and this fault code will be stored. During cranking, this signal is used to convey the engine coolant temperature. The coolant tem- perature signal persistsfor 500 msec after reaching the engine run threshold of 400 rpm. If theTCM does not recognise a valid throttle angle signal afterthis time then a substitute throttle value (47%) will be used and the warning lamp will
be
lit and this fault code will be stored. A fault code will only be stored if the engine speed is greater than 400 rpm. If an out of range coolant temperature is received then a substitute coolant temperature value (77" C) is used but no fault is stored.
X300 EDM 21 Issue 1 August 1994

Automatic Transmission (AJ16)
SPORT MODE INDICATOR - P 1792
The sport mode lamp is located in the instrument pack. The input is 'pulled up' to nominal battery voltage (+12V) and
is supplied by an ignition switch feed. The TCM drives the signal to ground to turn the lamp on. The diagnostic runs
on the sport mode indicator output continuously during initialization and operation. The
checkcan detect an open cir- cuit, a short circuit to battery and short circuit to ground, although the diagnostic cannot distinguish between an open
circuit and a short to ground.
TCM
(CC007) BULKHEAD HARNESS (FC007) INSTRUMENT PACK (FCOO9)
PIN 49 - SPORT PIN 14
PIN 14
Possible causes:
. Faulty wiring harness I connectors.
. Faulty indicator lamp.
Faulty instrument pack.
Effects:
. No illumination of indicator lamp on instrument pack.
. Permanent illumination of indicator lamp on instrument pack.
Remedy:
. Repair or renew harness 1 wiring.
. Renew indicator lamp.
0 . Examine instrument pack fault diagnosis (refer to EDM, Section 15).
1
Y.IM
Fig. 1 Fault Code PI792 ~~
X300 EDM 23 Issue 1 August 1994

lw Automatic Transmission (AJ16)
SYSTEM VOLTAGE MALFUNCTION - P 1794
The TCM monitors the supply voltage and will log this fault if the voltage is less than 10.5V when the engine speed is
greaterthan 1600rpm. This fault code is unlikelyto becaused by afault within theTCM and assuch thevehicle harness
and fuses etc. should be completely tested before the TCM is condemned.
Possible causes:
. Blown fuses.
. Faulty harness wiring /connections.
Effects:
Transmission default settings adopted.
. MIL illuminated.
Transmission warning lamp illuminated.
. Maximum fluid pressure available.
. Limp home mode applied.
Remedy:
Examine fuse F14 in LH heelboard fuse-box. Renew (if necessary) after determining cause of rupture.
. Repair or renew harness / connector.
KICK-DOWN SWITCH SYSTEM - P 1796
The diagnostic check on the mode switch input is a plausibility check which is performed continuously while in oper- ation. A fault is determined when kickdown is seen when the throttle angle is less than 50%. However a fault will only
be logged if the output speed is greater than 256 rpm. No fault is logged if there is already a throttle signal fault. The
kickdown switch is located on the floor under the accelerator pedal and is operated when the throttle is fully open (ap- prox 90%). It is a normally open switch with one contact permanently to ground and the other is a signal to the TCM.
The signal wire is routed through the bulkhead harness and the gearbox harness to the TCM.
LHD
(FCO19) PIN 2 GROUND PIN 1 KD
SIGNAL
RHD
(CA074) PIN 2 GROUND PIN 1 KD
SIGNAL
Possible causes
. Faulty harness wiring /connections.
. Faulty switch (or switch adjustment).
Effects:
No kickdown facility.
Remedy:
. Repair or renew harness /connector.
. Re-adjust or renew switch.
0
0
0
Q
Issue 1 August 1994 24 X300 EDM

Srake Switch lnpiit Malfiincfion - PO703
Function:
Monitoring of brake switch operation.
Connection: TCM Connector
CC048/025 CC003/009
Possible causes:
. Faulty switch, wiring or connection.
Effects:
Torque converter clutch operation may be abnormal.
Remedy:
. Repair or renew switch, wiring or connector. Switch
CA072/001
Ground
CA002/002
P2!
1
Brake
switch input malfunction -fault code PO703
I -I I I I I I ,I
J86 - 1741 Fig. 1
Issue 1 August 1994 10 X300 EDM

Powertrain Automatic Transmission (V12)
Transmission Range Sensor Fault - PO706
Function:
Gear selection identification.
Connection: TCM Mu Iti-pl ug Pressure Switch Manifold
Connector
CC048/003 GBO 10/007 GB012/004 (mode X)
CC048/022 GBO 10/008 GB012/005 (mode Y)
CC048/004 GBO 1 O/OOS GB012/006 (mode Z)
Possible causes:
. Faulty harness wiring or connection from pressure switch manifold.
. Faulty operation of pressure switch manifold.
Effects:
. Incorrect gear selections, ie D2 and D3 not selectable.
9 MIL illuminated.
Remedy:
. Repair or renew harness / connectors.
. Renew manifold.
Po:
Pi
PC
1
Transmission range sensor -fault code PO706
I 2
JE6. 1742 Fig. 1
X300 EDM 11 Issue 1 August 1994 ~~ ~~ ~

Automatic Transmission (V12) Powertrain
Transmission Fluid Temperature Sensor Input low/ high - PO712 / PO713
Function:
Fluid temperature monitoring.
Connections: TCM Connector Multi-plug Connector Transmission Connector
(CC048) (GBOIO) (GB012)
PIN 26 - SIGNAL
PIN 14
- GROUND PIN
10 - SIGNAL
PIN
11 - GROUND PIN
07 -SIGNAL
PIN
08 - GROUND
Possible causes:
8 Faulty sensor.
8 Faulty harness wiring or connection to sensor.
Effects:
. MIL illuminated.
. Poor gearshift quality
Remedy:
. Renew sensor.
8 Repair or renew harness I connectors.
P2E
P14
Transmission fluid temperaturesensor-fault codes P0712/P0713
1
Fig. 1 JR6 1743
0
0
X300 EDM Issue 1 August 1994 12

Automatic Transmission (V12) Powertrain
Input Speed Sensor - range /performance and malfunction - PO715 / PO716
Function:
Received speed monitoring.
Transmission Connector
(GB014)
PIN 02
PIN 01
Connections: TCM Multi-pl ug
Connector
(CC048) (GB015)
PIN 37 PIN 03
PIN 50 PIN 04
Data:
Sensor resistance = 1.25kQ f 0.25
Possible causes:
9 Faulty sensor.
9 Faulty harness wiring 1 connectors.
Effects:
. MIL illuminated.
. Harsh gearshifts, no torque converter clutch control.
. No fourth drive gear (Fault Code PO716 only).
Remedy:
. Repair or renew harness 1 connectors.
Renew sensor.
0
0
1
Input speed sensor - fault code PO715 / PO716
J86 - 1714
Fig. 1
X300 EDM 13 Issue 1 August 1994

Automatic Transmission (V12) Powertrain
Output Speed Sensor - PO720 / PO72 1
Function:
Delivered speed monitoring.
Connections: TCM Multi-plug
Connector
(CC048) (GB015)
PIN 36 PIN 02
PIN
51 PIN 01
Data:
Sensor resistance = 1.25kQ f 0.25
Possible causes:
. Faulty sensor.
. Faulty harness wiring /connectors.
Effects:
. MIL illuminated. Transmission
Connect or
(GBO 13)
PIN 02
PIN 01
. Second gear selected permanently ie 'Limp Home' mode.
Remedy:
. Repair or renew harness /connectors.
Renew
sensor.
PX
P51
1 Output speed sensor -fault codes PO720 / PO721
586. 1?45
Fig. 1
0
0
0
X300 EDM Issue 1 August 1994 14