Jaguar X-Type Sedan and Estate (Wagon). Service manual — part 357
Item
Part Number
Description
1
—
Sub lower body
2
—
Bracket
3
—
Clip
4
—
Line pressure duty solenoid
5
—
Low clutch timing solenoid
6
—
Bracket
7
—
2-4 brake duty timing solenoid
8
—
2-4 brake timing solenoid
9
—
Pilot filter
10
—
Separate plate A
11
—
Locating bolt
12
—
Filter
13
—
Lock-up solenoid
14
—
Reduction timing solenoid
15
—
Shift solenoid B
16
—
Shift solenoid C
17
—
Shift solenoid A
18
—
Lower body
19
—
Separate plate B
20
—
Internal body
21
—
Separate plate C
22
—
Upper body
23
—
Manual valve
There are 9 solenoids which can be classified as two types by the way in which they operate. Three of them are duty solenoids, the other
six are on/off types. The solenoids are actuated by the TCM output signals.
On/Off Solenoids
Shift solenoids A, B, C, low clutch solenoid, reduction timing solenoid and the 2/4 brake timing solenoid
The on/off solenoids close the pressure circuit in response to current flow.
Each solenoid has a internal coil. Current passes through coil and actuates the needle valve. The needle valve then opens and closes the
fluid pressure circuits.
Duty Solenoids
Line pressure solenoid, lock-up solenoid and the 2/4 brake duty solenoid.
The duty solenoids repeatedly turn on/off in 50Hz cycles, this opens and closes the fluid pressure circuits.
Sensors
Sensor Schematic
Item
Part Number
Description
1
—
Output shaft rotational speed sensor
2
—
Input shaft rotational speed sensor
3
—
Engine speed signal
4
—
Output gear rotational signal
5
—
TCM
6
—
Transmission control
7
—
Engine Control Module (ECM)
8
—
Intermediate sensor
9
—
Geartrain
10
—
Engine
11
—
Reduction geartrain
12
—
Turbine sensor
13
—
Vehicle Speed Sensor (VSS)
Transmission Fluid Temperature (TFT) Sensor
The TFT sensor is installed in the transmission case, it constantly monitors the fluid temperature resistance varies with fluid temperature.
Automatic transmission internal operational resistance varies with automatic transmission fluid temperature change. The TCM detects the
automatic transmission fluid temperature according to the voltage produced by the TFT sensor.
Speed Sensors
There are 3 sensors installed in the transmission casing. They are all of the inductive type.
Turbine Shaft Speed Sensor
The Turbine Shaft Speed Sensor (TSS) detects the reverse clutch drum revolution speed. The reverse clutch drum is connected to the input
shaft and rotates at the same speed. The TCM calculates the input shaft speed to determine the turbine speed.
The TSS uses a magnetic coil. As the input shaft rotates, the sensor detects a pulse signal according to the gear teeth on the outside of the
reverse clutch drum and sends it to the TCM.
Vehicle Speed Sensor
The vehicle speed sensor (VSS) detects the parking gear rotation speed. The TCM calculates the vehicle speed based on the parking gear
rotation speed.
The VSS uses a magnetic coil. As the parking gear rotates the sensor detects a pulse signal according to the gear teeth rotation speed and
then sends it to the TCM.
Intermediate Shaft Speed Sensor
The Intermediate Shaft Speed Sensor (ISS) detects the output gear rotation speed which is calculated by the TCM.
The ISS uses a magnetic coil. As the output gear rotates the sensor detects a pulse signal according to the gear teeth rotation and sends it
to the TCM.
Published: 11-May-2011
Automatic Transmission/Transaxle - Vehicles With: 5-Speed Automatic Transaxle -
JATCO - Diagnostic StrategyVehicles With: 5-Speed Automatic Transaxle - JATCO
Diagnosis and Testing
The complexity of the electronics involved with the automatic transmission/transaxle preclude the use of workshop general electrical test
equipment. Therefore, reference should be made to the Jaguar approved diagnostic system for detailed instructions on testing the
automatic transmission/transaxle.
Where a fault involving the automatic transmission/transaxle is indicated by the Jaguar approved diagnostic system, some basic diagnostic
methods may be necessary to confirm that connections are good and that the wiring is not damaged, before installing new components.
1. Verify the customer concern by operating the vehicle. Refer to the automatic transmission diagnostic drive cycle in the DTC
summary section.
1.
2. Check the fluid levels and condition of the fluid.
2.
3. Check for non-factory fitted items.
3.
4. Check the shift linkages for correct adjustment. REFER to Section
307-05A Automatic Transmission/Transaxle External Controls
/
307-05B Automatic Transmission/Transaxle External Controls
.
4.
5. Visually inspect for obvious signs of mechanical, electrical or hydraulic damage.
Visual Inspection Chart
Mechanical
Electrical
Hydraulic
Damaged shift mechanism/linkages
Damaged automatic transmission/transaxle
casing
Blown fuse
Wiring harness
Damaged transmission control module
(TCM)
Damaged rotary switch
Damaged, loose or corroded connectors
Fluid level too
high/low
Poor condition of fluid
Fluid leak
5.
Basic diagnosis
Check Fluid Level and Condition
CAUTION: The vehicle should not be driven if the fluid level is low as internal failure can result.
• NOTE: The transmission oil temperature must not be allowed to exceed 40°C whilst checking level. Should the temperature rise above this
figure, abort the check and allow the transmission oil to cool to below 30°C.
This vehicle is not equipped with a fluid level indicator. An incorrect level may affect the transmission operation and could result in
transmission damage. To correctly check and add fluid to the transmission,
REFER to
Transmission Fluid Level Check
in this section.
High Fluid Level
A fluid level that is too high may cause the fluid to become aerated due to the churning action of the rotating internal parts. This will cause
erratic control pressure, foaming, loss of fluid from the vent tube and possible transmission damage. If an overfill reading is indicated,
REFER to
Transmission Fluid Drain and Refill
in this section.
Low Fluid Level
A low fluid level could result in poor transmission engagement, slipping, or damage. This could also indicate a leak in one of the
transmission seals or gaskets.
REFER to
Transmission Fluid Level Check
in this section.
Adding Fluid
CAUTION: The use of any other type of transmission fluid than specified can result in transmission damage.
If fluid needs to be added, add fluid in 0.50 liter increments through the fill hole opening. Do not overfill the fluid. For fluid type, refer to
the General Specification chart in this section.
REFER to
Transmission Fluid Level Check
in this section.
Fluid Condition Check
1. Check the fluid level. For additional information,
REFER to
Transmission Fluid Drain and Refill
in this section.
1.
2. Observe the color and the odor. The color under normal circumstances should be reddish, not brown or black.
2.
3. Allow the fluid to drip onto a facial tissue and examine the stain.
3.
4. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.
4.
NOTE: Being thermostatically controlled, the lubrication system cannot be completely flushed. In the event of a transmission unit
replacement for internal failure, the oil cooler and pipes must also be replaced.
Shift Linkage Check
Hydraulic leakage at the manual control valve can cause delay in engagements and/or slipping while operating if the linkage is not correctly
adjusted; REFER to Section
307-05A Automatic Transmission/Transaxle External Controls
/
307-05B Automatic Transmission/Transaxle
External Controls
. for shift linkage adjustment.
Diagnostic Trouble Code (DTC) Index
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