DEFENDER2.NET - View topic - Throttle linked to trailer electrics????????????

↓ Advertise on Defender2 ↓

Home · FAQ · New Posts · My Posts · PMs · Search · Members · Map · Calendar · Profile · Donate · Register · Log In

Home > Puma (Tdci) > Throttle linked to trailer electrics????????????

Page 1 of 1

Print this entire topic ·

Matt

Member Since: 28 Feb 2011
Location: Aylesbury, Bucks
Posts: 180

2015 Defender 90 Puma 2.2 XS CSW Corris Grey

Throttle linked to trailer electrics????????????

Our farm landrover, an 11 plate 90 hardtop, has over the last few days developed an annoying problem with the throttle. When you take your foot off the pedal when changing gear, there is a delay from releasing the pedal to the engine revs lowering of about 3 seconds, so by the time you changed gear the revs still have not lowered down to the idle speed

. Seemed to me that it was something like a throttle position sensor on the engine or ecu problem.
Anyway we called out Landrover Assistance today, and within 30mins of calling they arrived (they had been half a mile down the road sorting out a disco). He soon fixed it and said that it was corrosion in the trailer socket that had caused this throttle problem

When I asked why he said that the throttle and trailer electrics are linked

Anyway he left (after backing his brand new disco into a gate post

), landy seems ok and I just though this sounded very dubious (but with LR build quality I suppose you never know

).

Discuss.

18th Aug 2011 8:36pm

pom

Member Since: 01 Jun 2010
Location: Worcester
Posts: 1343

I had the same thing with no trailer attached. The software update cured it.

Just unplug your trailer electrics and you will see its the same.

Pom

19th Aug 2011 8:31am

Matt

Member Since: 28 Feb 2011
Location: Aylesbury, Bucks
Posts: 180

LR assistance put a new socket on for us and this seems to have cured it. Apparantly if any part of the electrical system develops a short this can often affect engine performance

19th Aug 2011 1:28pm

Lorryman100

Member Since: 01 Oct 2010
Location: Here
Posts: 2686

It has to do with the CANBUS system fitted on the PUMA. That's why the trailer 12n socket is plugged in to the vehicle loom and not spliced in.

19th Aug 2011 1:40pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17876

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Lorryman100 wrote:
It has to do with the CANBUS system fitted on the PUMA. That's why the trailer 12n socket is plugged in to the vehicle loom and not spliced in.

CANBUS is only used to connect the ECU to the instrument pack on the Puma - doesn't get anywhere near the lighting circuits (which are the only connections in the 12N socket).

19th Aug 2011 6:05pm

Lorryman100

Member Since: 01 Oct 2010
Location: Here
Posts: 2686

So how does the ABS and 10AS communicate with the EMS and vice versa? How does the IC know what light circuits are active and how does the trailer icon know when to light up on the ic when using indicators? Just curious.

19th Aug 2011 6:23pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17876

Just checked the Puma electrical manual. The CANBUS is only used to connect the ECM (D131 connector C0872) to the instrument cluster (J100 connector C1040) and diagnostic socket (V100 connector C0040).

All other systems including alarm and ABS/TC interconnect using traditional non-multiplexed signals (and I would have thought that the 10AS alarm was designed before CANBUS had been thought of).

Trailer indicator warning light is usually activated by detecting the additional load of the additional bulbs on the indicator circuit.

19th Aug 2011 11:20pm

Page 1 of 1

All times are GMT + 1 Hour

Jump to

< Previous Topic | Next Topic >

Posting Rules

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum