L322 Range Rover System Description and Operation
AUTOMATIC TRANSMISSION – ZF 5HP24
44-2-46 DESCRIPTION AND OPERATION
Diagnostic Socket
1 Cover
2 Diagnostic socket
The diagnostic socket allows the exchange of information between the various ECU's on the bus systems and
TestBook/T4 or a diagnostic tool using Keyword 2000 protocol. The information is communicated to the socket via a
diagnostic ISO9141 K Line. This allows the retrieval of diagnostic information and programming of certain functions
using TestBook/T4 or a suitable diagnostic tool.
The EAT ECU uses a P code strategy which stores industry standard and Land Rover specific Diagnostic Trouble
Codes (DTC) relating to faults.
Transmission P Codes
P Code No.
Component/Signal
Fault Description
0702
EAT ECU internal error 4 (FET/FET 1)
Open circuit, short circuit to ground or
battery
0705
Inhibitor switch (PRNDL input)
Implausible
0710
Gearbox oil temperature sensor
Implausible
0711
Gearbox oil temperature sensor
Open circuit
0712
Gearbox oil temperature sensor
Short circuit to ground
0713
Gearbox temperature sensor
Short circuit to battery
0715
Input speed sensor
Implausible
0716
Input speed sensor
Value too large
0720
Output speed sensor
Implausible
0721
Output speed sensor
Implausible, value too large
0730
Gear ratio monitoring
Implausible
0731
1st gear ratio
Implausible
0732
2nd gear ratio
Implausible
0733
3rd gear ratio
Implausible
0734
4th gear ratio
Implausible
0735
5th gear ratio
Implausible