Diagnostics (page 2 of 3)

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