JAGUAR XJ6 1994 2.G Electrical Diagnostic Manual

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

Engine Speed Input - PO726 / PO727
Function:
Reference speed generation.
Connections: TCM PI Harness ECM
CC048/030 P1063/002 P1044/010
Possible causes:
. Faulty harness wiring / connectors.
. Faulty signal from ECM.
Effects:
. MIL illuminated.
. Harsh gearshifts
Remedy:
. Repair or renew harness / connectors.
Examine ECM fault diagnosis (refer to EDM, Section 5.2).
P30
1
Engine speed input -fault codes PO726 / PO727
J86 - 1746
Fia. 1
X300 EDM 15 Issue 1 August 1994

0
0
0
e

Powertrain Automatic Transmission (V12)
TCC Stuck Off / On or Malfunction - PO74 1 / PO742 / PO743
Function:
Torque converter clutch operation monitoring.
Connections: TCM Multi-plug Connector
CCO48/042 GBOlO/OO1
GB010/003 (12V)
Possible causes:
. Faulty harness wiring 1 connection.
. Faulty torque converter clutch solenoid.
. Mechanical failure, eg slippage.
Effects:
. MIL illuminated.
' No TCC control (Not Fault Code P0742).
Harsh gearshifts or stalling (Fault Code PO742 only).
Remedy:
. Repair or renew harness 1 connectors.
Refer to VSM, Section 8.2.
. Renew TCC solenoid. TCC
Connector
GBOl2/009
GBO 1210 10
PQ:
1 Torque con
Fig. 1
01 clutch -fault codes PO741 1 PO743 I PO748
J80 - IT47
Note: * +12V present only when ignition switched ON
X300 EDM 17 Issue 1 August 1994

Automatic Transmission (V12) Powertrain
Force Motor (Variable Pressure Control Solenoid) Fault - PO748
Function:
Pressure control manifold operation monitoring.
Connections: TCM Multi-plug TCC
Connector
CCO48/052 GBO 10/005 GBOl2/0
CC048/049 GBO 10/006 GBOl2/0
Possible causes:
8 Faulty harness wiring I connectors.
8 Faulty force motor.
Effects:
8 Harsh gearshifts
Remedy:
. Repair or renew harness 1 connectors.
. Renew force motor.
8 Refer to VSM, Section 8.2.
1
3
P52
P49
Force motor -fault code PO748
2
1
Fia. J86 . 1748
X300 EDM Issue 1 August 1994 18

Powertrain Automatic Transmission (V12)
Solenoid Valves A and B - Performance /Electrical - PO75 1 / PO753 and PO756 / PO758
Function:
Valve operation monitoring.
Connections: TCM
CCO48/039
CCO48/043
Multi-plug
Connector
GBO
10/002
GBOl0/004
GBO 10/003
(+12V)
Transmission
GB012/001 SOL A
GBOl2/002 SOL B
GB012/003 SUPPLY
Possible causes:
. Faulty valve.
. Faulty harness wiring 1 connectors.
. Blown fuse.
Effects:
9 MIL illuminated.
Second gear selected permanently ie 'Limp Home' mode.
Remedy:
. Renew faulty valve.
Repair or renew harness 1 connectors.
. Renew fuse F14 in LH heelboard fuse-box on determining reason for rupture.
1 1
Solenoid valves -fault codes PO751 / PO753 / PO756 / PO758
1
Fia. 1 JUl3 ~ 1749
&@: * +12V present
only when ignition switched ON
X300 EDM 19 Issue 1 August 1994