306oc - Peugeot 306 Owners Club & Forum

As above, I bought a Bluetooth OBD2 Code reader for my car its coming up with no OBD2 protocol found im assuming being french and old it hasnt ????????

Depends which 306. The XUD DTurbos defiantly wont be and most PH1s probably wont not be.

Stuff like HDis and GTi6s definitely are though.

Mines a 1999 1.4 Lx, ive got a OBD socket under the steering wheel but i cant get it in to it with the launch machine we've got at work or my ELM327 with scantool on my laptop

It should be OBD2 compliant as its a ph3. It could be the tool being shit but it could be the car being french.

haha lol yea more than likely lol, anybody know what protocal the 306 runs ??? i assume its not CAN-BUS but is it VPW or PWM ect

If you bought one of the elm327 scanners from eBay, good luck! I bought one and it only worked when it wanted. And that was rarely!

Oh and I know a few will argue with me on this but the late 306s are actually part can-bus

306 hdi use's ISO9141 for OBD diag


think the 1.4 needs diag equipment thats able to display fault locations as text

so the elm wont work as it displays numbered trouble codes not text

the only 306 i have come across that will work with the universal scan tools is HDis

My 1.8 meridian (V reg) wasnt. The tool I have isn't broken though as it works on my older Saab.

i thought the hdi was a kwp2000 protocol, thats what mine comes up with unless thats the iso number for it? the hdi is kinda part canbus, i think the fuel injection system is and a lot of the sensers as it all reads through the ecu's as a multi-plexed system but its not fully canbus like new cars now it doesnt run everything, so it would be part as it was early stages.

unlike the new bmw for exsample has over 74 ecu's sitting in it, everything is run on canbus, has radio ecu's, ecu's for the lights, airbag ecu's, main ecu, another one of canbus is the new vauxhall astra's 56 on, if you put the lights on and take the rear light out, then plug it back in, it wont work the ecu remembers it and switchs its self off so you have to turn the lights off and on again... the hdi isent like that... but yeah anyway im bored of typing now..

Only part of the 306 that is can bus is the days module and ecu. Well it is on the late 1.8s. Don't know if it's the same with the HDi.

hdi OBD pinout

pin number
OBD pin 1(wireCC40)...... Ign Bat+(pin2 wire CC3)
OBD pin 2....No connection
OBD pin 3 (wire 426A)......Air conditioning control unit (ECU)(pin g4 wire 426) and Instrument panel (pin21 wire 426)
OBD pin 4 (wire MC40).........Ground (wire M05)
OBD pin 5 (wire MC41).........Ground (wire M05)
OBD pin 6 (wire B000).........air conditioning ECU (pin7 wire 1901)
OBD pin 7 (wire 140)....ECU (pin b4 wire 140) ISO 9141-2 KLine
OBD pin 8 (wire 1510)....Fan unit operation 1 info (pin8 wire 1510)
OBD pin 9....No connection
OBD pin 10....No connection
OBD pin 11 (wire 824)....protection central unit (pin11 wire 824)
OBD pin 12 (wire 704.....anti-lock brake control unit (pin 11 wire 704)
OBD pin 13 (wire 6540/6543)....air bag and pretensioners control unit (pin 15 wire 6540)
OBD pin 14....No connection
OBD pin 15....(wire 141)....ECU (pin j4 wire 141) ISO 9141-2 L Line
OBD pin 16 (wire BFM26)....Maxi fuse 2 (pin 2 wire BFM2)

ecu pin numbers are for the 592 3 plug ecu