Thread: Need help to read fault logs of a D2

Originally Posted by phil&liz

Now have a nanocom. Only one fault being recorded for the auto: P0722 (22) "stall speed monitoring"
have the system document "4 speed electronic automatic transmission system" revision 2.3 by Rover Group 1998 and have followed the fault tree analysis for fault code 22 (p0722)

It's some contradiction here and IMO you are missleaded a bit, for the D2 according to the workshop manual the code is described as P0722(22) -* Torque converter slipping = maintains current gear in low range, limp home mode in high range. Shift pressure to maximum...which has a logic cos a TC slippage is ''acknowledged'' by the management based on engine speed, road speed and output shaft sensor inputs (which means the stall speed monitoring) but i presume that LR described it so cos it's more common than the sensor failure... also it's well known that a stall situation can be induced by slipping TC

the action they recommend in that document you quoted is more specific to the OBDII/EOBD code description : P0722 Output shaft speed (OSS) sensor - no signal Wiring, VSS, ECM/PCM/TCM which is not specific for D2

so maybe you better go that route... or try to find somebody with a tester made on original protocol like Hawkeye, Lynx, Aurologic or T4 to double check cos it's suspect to me... i have both testers nanocom and hawkeye and unfortunately i must iterate that nanocom proved itself unreliable in many cases with all ECUs/BCU except the engine ECU

see 3'rd code in the attachment

that hi/low thing is well known with nanocom dont bother with it

Yep. Wiring checked connector to connector. Thanks PhilipA

I don't think it's a slipping torque converter. The d2 pulls OK with no obvious sign of slippage.
Getting a loan of another Auto ecu (GS8.87.0) tonight from Billymon. Will post results
Thanks All
Thanks for the loan Billymon

an important point might pay to check that the ecu is from the same model year and engine configuration as there may be variations from year to year between td5 to v8 as there is with fuse boxes and other components

The current auto ecu: GS8.87.0
0 260 002 474
ZF 0501 005 463
LR UHC 100 250
002 761C1214
GCD 622991528

I didn't get another gs8.87.0 last night. Billymon misunderstood me and brought the engine ecu instead.
The current engine ecu details:
Fuel type: sudhe022 (discovery/automatic/european)
tune id: sutdp007

Changed over the speed sensor but the problem still persists.
The resistance of both sensors are around 330 Ohm. The fault tree for code 22 in the Rover Group document should have listed the resistance at ~350 Ohm, not ~1050 Ohm

Tried another trans ecu yesterday. Slightly different symptoms, same problem.
Car with Jim Walton autos Heid. west for assessment today.

Maybe you should reconsider to trust in LR description of that fault code