C70 2007 engine start problem

pkos · Aug 4th, 2012, 10:03

On a long parked 2007 c70 with auto gearbox, the battery got drained and I replaced it with a new one. But since then I cannot start the engine, allthough windows, ventilation and lights are working, radio is not, maybe locked.

When I press the ignition key I can hear the fuel pump working but no sound from starter, not even a click from starter relay at the fuse box.
I checked all fuses and relays they are fine. Brake light switch is also working fine.

There is only one system message "Engine system service required" not very helpfull though.

Has anyone a clue? much appreciated.

Clan · Aug 4th, 2012, 10:16

Firstly is yours a 2.0D ? if so there is a problem with the roof control module draining the battery , your dealer should do a software update for this .
Secondly how do you get it going again? Try an engine ECU software reload , its worked for me a number of times in this situation . you will have to get towed to a dealer though ..

copperknob · Aug 4th, 2012, 17:01

spot on clan roof control module is draining battery so new sw required ,,now battery is flat ecu has lost key no's so reload required 2 x lots of software required for this fault

pkos · Aug 4th, 2012, 17:22

I must call an authorized technician for this fault as I understood.

Thank you for your replies.

Aug 4th, 2012, 10:03	#1
pkos New Member Last Online: Aug 6th, 2012 22:37 Join Date: Aug 2012 Location: Athens	C70 2007 engine start problem On a long parked 2007 c70 with auto gearbox, the battery got drained and I replaced it with a new one. But since then I cannot start the engine, allthough windows, ventilation and lights are working, radio is not, maybe locked. When I press the ignition key I can hear the fuel pump working but no sound from starter, not even a click from starter relay at the fuse box. I checked all fuses and relays they are fine. Brake light switch is also working fine. There is only one system message "Engine system service required" not very helpfull though. Has anyone a clue? much appreciated.

Aug 4th, 2012, 10:16	#2
Clan Experienced Member Last Online: Today 16:48 Join Date: Jun 2007 Location: L/H side	Firstly is yours a 2.0D ? if so there is a problem with the roof control module draining the battery , your dealer should do a software update for this . Secondly how do you get it going again? Try an engine ECU software reload , its worked for me a number of times in this situation . you will have to get towed to a dealer though .. __________________ My comments are only based on my opinions and vast experience .

Aug 4th, 2012, 17:01	#3
copperknob Senior Member Last Online: Oct 23rd, 2012 07:57 Join Date: Jun 2012 Location: scotland	spot on clan roof control module is draining battery so new sw required ,,now battery is flat ecu has lost key no's so reload required 2 x lots of software required for this fault

Aug 4th, 2012, 17:22	#4
pkos New Member Last Online: Aug 6th, 2012 22:37 Join Date: Aug 2012 Location: Athens	I must call an authorized technician for this fault as I understood. Thank you for your replies.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)