peugeot 306 hdi 2.0l diesel 1999(v) - will not start

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Mon 26 Apr 2010 10:57
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - linap

Hi,

After running so well my car just stopped and will now only turn over when switching the ignition.

I have been to a dealer who did not want to know about repairing the vehicle and gave me a price more than I paid for the car to POSSIBLY get the vehicle going?

I have checked the management double relay and found that is not energising.

I have +12v on terminals 11,14,8 of the relay with the ignition switched on but can not get the relay coils to energise.

The relay coils go to terminal 87 and 86 of the ecu,(bosch EDC15C2).

Without the relay energised, I cannot get +12v to:

Terminal 1 of the ECU ,

Fuses 33 which controls the LP fuel pump,

Fuse 35 which controls the 3rd piston deactivator,egr , and HP regulator.

The above items go back to the ECU onto terminals 80,52,50 respectively.

I have checked for continuity and earth / direct shorts on the cabeling from the ECU connector to each engine component and all are o.k.

I would be very grateful if anyone can give me advise on where to go next?

Regards

Paul

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Mon 26 Apr 2010 11:28
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - FP

I run a 306 Hdi myself and am totally puzzled by your problem; however, if you e-mail me on cjcrawley(at)hotmail.com I may be able to put you in touch with someone who can help.

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Tue 27 Apr 2010 00:32
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - Avant

Thread moved to Technical as you may get more help here.

Edited by Avant on 27/04/2010 at 00:32

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Tue 27 Apr 2010 22:54
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - mickeybo

At relay 15 pin relay at pin no's 3-8- 11 - 15 you must have 12v feed permanent voltage at these pin no's. Pin no's 7 &10 for this relay are earths ecu controlled these activate the relay with ignition on. with ign on you should have voltage at ecu pin no's 69 -1 -29 -68 hope this helps Best Reguards Mickeybo

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Wed 28 Apr 2010 12:42
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - linap

Hi,

With the ignition switched on:

I have checked the management double relay and found that the coil is NOW energising via relay pin 10,(ECU term 86), to supply 12v to pin 1 & 29 of the ECU.

But the other coil, pin 7 of the relay, (energised via ECU pin 87), is not energising to supply 12v to fuses 33 & 35, (LP fuel pump, & 3rd piston deactivator, egr , and HP regulator)

I have grounded pin 7 of the relay,( via ECU term 87), and this then supplies 12v to the above items, and the LP pump runs contstantly.

I do not have a supply at the ECU on pins 68 & 69.

My elec diagram shows,

pin 68 is connected to the accelerator sensor.

pin 69,( supplied via a common ignition feed), connects to the speed sensor, pre heat & heater relay coils and air flow sensor.

I am going to trace the continuity of the ECU wire on term 69 to the ignition supply,(via the common connection somewhere), to see if I have lost this supply.

Would I harm the ECU if I connect an ignition switched supply to terminal 69 of the ECU if i find the wire has broken?

and does this interact with the ECU to give a ground output on the ECU term 87,( to supply a ground to the relay on term 7).

Many Thanks for replying

Paul

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Wed 28 Apr 2010 19:43
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - mickeybo

Sorry about wrong imformation maybe a pint too many should be no voltage at pin 69 ecu

Pin 7 at 15pin relay travels via inerta fuel shut off switch to pin no 87 at ecu

check inerta switch or bridge out pins 1 and 3 and then check for voltage ign on at ecu pin no 87 hope this helps

best reguards mickey bo

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Wed 28 Apr 2010 22:22
peugeot 306 hdi 2.0l diesel 1999(v) - will not start - linap

Mickey,

I have checked the continuity across the inertia switch from pin 7 of the relay to pin 87 of the ECU and it is o.k.

Do you know how ECU pin 87 allows pin 7 to energise the relay coil?

Does it rely upon the ignition supply to pin 69 of the ECU?

I ask this because I cannot get a 12v ignition supply onto this terminal, also somewhere on the vehicle this ignition supply is connected to supply 12v to the items listed below,( I have checked with my wiring diagram and tested).

Indicated are the voltages present against each component.

Diagnostic Socket term 1------- 12v

MAF term 2---- no voltage

ECU term 69----- no voltage

Glow Plug Relay term 3-----no voltage

Fuse MF 1 Heater relay coil term A1----------- 3.5v

Fuse MF2 Heater relay coil term B1------------2.6v

I have started continuity checks and only found continuity on the cables between the 2 Heater relay coil connections, and from the ignition switch to the diagnostic socket.

I have no continuity from the ignition to all other components listed

Cheers

Paul

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