Range Rover Automatic Transmission. Manual — part 15
System Information Document
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[ZF_4SPD\Project_Specs]
[Revision: 2.3]
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© Rover Group 1998
Page 31 of 52
6 General information
6.1 Dimensions and fixing details
The transmission controller ECU is located under the front left had seat, under a black metal bracket. To remove the ECU, a
medium sized philips screwdriver is required, together with 8mm and 10mm sockets, a short (40mm) extension and a 1/4 inch
drive socket.
The trim surrounding the base of the seat must first be removed. This sometimes requires the panel on the left of the seat to be
removed. After this has been done, remove 3 x 10mm screws which hold down the bracket. When these have been removed,
disconnect the ECU from the harness (ensure the ignition is off). The bracket can now be removed from the vehicle. Remove
the ECU from the bracket using an 8mm socket.
Approximate ECU dimensions:
6.2 Voltage requirements
Voltage
System behaivor
16.0
-
26.0
Jump start; excess voltage without damage, limphome mode, output stanges for solenoid valves and
pressure regulator switched off (max 1min at 40
°
C).
9.0
-
16.0
Voltage range for normal operation of the EAT with CAN-Bus corresponding to the specification.
6.5
-
9.0
Operation of the EAT with diagnostic functions and CAN-Bus enabled, limp home mode, output stages
for solenoid valves and pressure regulator switched off.
3.0
-
6.5
Under voltage with data retention in SRAM, limp home mode, unreliable communication over the CAN
bus.
0
-
3.0
Undervoltage without reliable function
-14
-
0
Reversed polarity without damage (-14V max 1 min at 25
°
C)
GETRIEBESTEUERUNG
GS8.87
BOSCH
B260502761
MUSTER
HW-Stand: xxxx
Discovery
SW-Stand: xxxxxxxx
0501005463
FTC484x
200mm
163mm
60mm
95mm
32mm
System Information Document
____________________________________________________________________________________________________
_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
_
© Rover Group 1998
Page 32 of 52
7 Fault tree analysis
The following pages are a guide to fixing faults with the electronic automatic transmission. In order to solve fault, the fault
trees indicate the most logical way a problem should be approached. If the fault tree indicates the transmission or controller is
faultly, the transmission electronics department should first be consulted.
In the instance, somebody will look at the car, and if nothing is deemed to be faulty with the electronics, the Transmissions
department will check the condition of the gearbox. If both the transmission and the controller are deemed to be OK, the
diagnosis will have to be further investigated by Transmission Electronics.
7.1.1.1 Fault code 1 – Transmission relay control (Sticks S/C)
System Information Document
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_
[ZF_4SPD\Project_Specs]
[Revision: 2.3]
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© Rover Group 1998
Page 33 of 52
7.1.1.2 Fault code 2 – Transmission relay control (Permanent O/C)
System Information Document
____________________________________________________________________________________________________
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[ZF_4SPD\Project_Specs]
[Revision: 2.3]
____________________________________________________________________________________________________
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© Rover Group 1998
Page 34 of 52
7.1.1.3 Fault code 3 – EEPROM communication fault
7.1.1.4 Fault code 4 – EPROM checksum fault
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