Please Help! Rover 75 V6 - EP Limp home mode.

bearhouse · 27th January 2019, 10:43

Hi All,

My Rover 75 V6 has gone into gearbox EP - Limp home mode.

It's been fine. The traction control fail message come on about a week ago but was otherwise ok. Then the other day, on starting it went straight into EP mode. The cooling fan is also at max and I noticed the rear demister won't come on.

I've checked the Plenums which are ok. I also found a thread that suggested it may be fuse 34 blown which again is ok.

I'm reluctant to dump the car as I've had it from new so if anyone has had a similar issue and can suggest a fix, I'd be eternally grateful.

Regards,

Terry.

klarzy · 27th January 2019, 12:55

Quote:

Originally Posted by bearhouse

Hi All,

My Rover 75 V6 has gone into gearbox EP - Limp home mode.

It's been fine. The traction control fail message come on about a week ago but was otherwise ok. Then the other day, on starting it went straight into EP mode. The cooling fan is also at max and I noticed the rear demister won't come on.

I've checked the Plenums which are ok. I also found a thread that suggested it may be fuse 34 blown which again is ok.

I'm reluctant to dump the car as I've had it from new so if anyone has had a similar issue and can suggest a fix, I'd be eternally grateful.

Regards,

Terry.

They. Try disconnecting the battery for an hour... this offer helps reset many small communications issues...

bearhouse · 27th January 2019, 14:40

Many thanks. I have tried disconnecting the battery for about 30 mins but I will disconnect and leave over night to see if it may help.

markypicks · 27th January 2019, 15:19

try and get in touch with marinabrian or big russ there the tech gurus rgds mark

marinabrian · 27th January 2019, 18:24

I suspect there to be a problem on the CANBUS wiring between the ECM and the Jatco EATCU.

This is based upon the traction control issues you are also experiencing.

So the wiring which is twisted pair, and originates on pin 27 and 57 of the engine management plug, and pins 33 and 12 on the Jatco EATCU.

The colour scheme is yellow with brown tracer, and yellow with black tracer.

Easy enough to check with a multimeter

Have fun

Brian

bearhouse · 27th January 2019, 19:07

Thanks Brian. I presume the ECU is in the passenger side plenum? Where is the gearbox end? In it in the engine bay or under the car. Are you suspecting a broken wire?

Many thanks for the help.

Regards,

Terry

marinabrian · 27th January 2019, 21:06

Quote:

Originally Posted by bearhouse

Thanks Brian. I presume the ECU is in the passenger side plenum? Where is the gearbox end? In it in the engine bay or under the car. Are you suspecting a broken wire?

Many thanks for the help.

Regards,

Terry

I've replied in detail via PM Terry, but yes I suspect a broken wire

Brian

27th January 2019, 10:43	#1
bearhouse Regular poster Rover 75 Join Date: Aug 2009 Location: Herts Posts: 78 Thanks: 0 Thanked 0 Times in 0 Posts	Please Help! Rover 75 V6 - EP Limp home mode. Hi All, My Rover 75 V6 has gone into gearbox EP - Limp home mode. It's been fine. The traction control fail message come on about a week ago but was otherwise ok. Then the other day, on starting it went straight into EP mode. The cooling fan is also at max and I noticed the rear demister won't come on. I've checked the Plenums which are ok. I also found a thread that suggested it may be fuse 34 blown which again is ok. I'm reluctant to dump the car as I've had it from new so if anyone has had a similar issue and can suggest a fix, I'd be eternally grateful. Regards, Terry.

27th January 2019, 14:40	#3
bearhouse Regular poster Rover 75 Join Date: Aug 2009 Location: Herts Posts: 78 Thanks: 0 Thanked 0 Times in 0 Posts	Many thanks. I have tried disconnecting the battery for about 30 mins but I will disconnect and leave over night to see if it may help.

27th January 2019, 15:19	#4
markypicks Gets stuck in rover 75 saloon cdt club se re map 160 bhp Join Date: Dec 2018 Location: sheffield Posts: 558 Thanks: 227 Thanked 169 Times in 135 Posts	try and get in touch with marinabrian or big russ there the tech gurus rgds mark

27th January 2019, 18:24	#5
marinabrian MG ZT Join Date: Jan 2011 Location: Newcastle Upon Tyne Posts: 20,151 Thanks: 3,565 Thanked 10,837 Times in 5,718 Posts	I suspect there to be a problem on the CANBUS wiring between the ECM and the Jatco EATCU. This is based upon the traction control issues you are also experiencing. So the wiring which is twisted pair, and originates on pin 27 and 57 of the engine management plug, and pins 33 and 12 on the Jatco EATCU. The colour scheme is yellow with brown tracer, and yellow with black tracer. Easy enough to check with a multimeter Have fun Brian

27th January 2019, 19:07	#6
bearhouse Regular poster Rover 75 Join Date: Aug 2009 Location: Herts Posts: 78 Thanks: 0 Thanked 0 Times in 0 Posts	Thanks Brian. I presume the ECU is in the passenger side plenum? Where is the gearbox end? In it in the engine bay or under the car. Are you suspecting a broken wire? Many thanks for the help. Regards, Terry