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Forums › The Car › 206 Problems › EOBD no longer works. |
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 Posted: Tue Mar 15, 2016 4:15 pm |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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For some reason my code reader will no longer switch on when connected to the EOBD plug. It still works on my other cars.
As my car spends so long being unused it spends all of the time with the battery disconnected. Could this have done something to the BSI ( a non multiplexed 206 still has one doesn't it? )
Don't forget my engine is now run from the Omex ECU. any ideas? Everything else still works like the clocks etc.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Tue Mar 15, 2016 5:30 pm |
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Joined: Jan 29, 2011
Posts: 6526
Trade Rating: +10
Location: Westhoughton, Lancashire
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I thought the code readers read from the ECU and not the BSI. Could it be the Omex ECU isn't EOBD compliant?
It might also be the OBD protocols that are out
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OBD-II signal protocols
There are five signaling protocols that are permitted with the OBD-II interface. Most vehicles implement only one of the protocols. It is often possible to deduce the protocol used based on which pins are present on the J1962 connector:
SAE J1850 PWM (pulse-width modulation — 41.6 kB/s, standard of the Ford Motor Company)
pin 2: Bus+
pin 10: Bus–
High voltage is +5 V
Message length is restricted to 12 bytes, including CRC
Employs a multi-master arbitration scheme called 'Carrier Sense Multiple Access with Non-Destructive Arbitration' (CSMA/NDA)
SAE J1850 VPW (variable pulse width — 10.4/41.6 kB/s, standard of General Motors)
pin 2: Bus+
Bus idles low
High voltage is +7 V
Decision point is +3.5 V
Message length is restricted to 12 bytes, including CRC
Employs CSMA/NDA
ISO 9141-2. This protocol has an asynchronous serial data rate of 10.4 kbit/s. It is somewhat similar to RS-232; however, the signal levels are different, and communications happens on a single, bidirectional line without additional handshake signals. ISO 9141-2 is primarily used in Chrysler, European, and Asian vehicles.
pin 7: K-line
pin 15: L-line (optional)
UART signaling
K-line idles high, with a 510 ohm resistor to Vbatt
The active/dominant state is driven low with an open-collector driver.
Message length is Max 260Bytes. Data field MAX 255.
ISO 14230 KWP2000 (Keyword Protocol 2000)
pin 7: K-line
pin 15: L-line (optional)
Physical layer identical to ISO 9141-2
Data rate 1.2 to 10.4 kbit/s
High signal voltage level: +12V (min/max 9.60 to 13.5)
Message may contain up to 255 bytes in the data field
ISO 15765 CAN (250 kbit/s or 500 kbit/s). The CAN protocol was developed by Bosch for automotive and industrial control. Unlike other OBD protocols, variants are widely used outside of the automotive industry. While it did not meet the OBD-II requirements for U.S. vehicles prior to 2003, as of 2008 all vehicles sold in the US are required to implement CAN as one of their signaling protocols.
pin 6: CAN High
pin 14: CAN Low
CANH signal voltage level: 3.5V (min/max 2.75 to 4.50)
CANL signal voltage level: 1.5V (min/max 0.5 to 2.25)
All OBD-II pinouts use the same connector, but different pins are used with the exception of pin 4 (battery ground) and pin 16 (battery positive). |
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Posted: Wed Mar 16, 2016 12:38 am |
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Joined: Nov 27, 2010
Posts: 11520
Trade Rating: +10
Location: What's it to you? ? ?
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Have you checked the EOBD socket still has all it's voltage & earth supply's working?
There will be a pin out drawing online to show which pin does what.
Time to get the multimeter out.
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| Toyota C-HR GR Sport 2.0 Hybrid with JBL & Alcantara packs. | |
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Posted: Wed Mar 16, 2016 2:14 am |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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I'm not looking to get anything back from the Omex. As the original ecu is still connected but has some sensors missing it should bring back some fault codes. I wanted to compare it's view of coolant temperature to that of the Omex. I think you might be right about getting the multimeter out.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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Posted: Wed Mar 16, 2016 6:55 am |
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Joined: Feb 10, 2010
Posts: 4266
Trade Rating: +4
Location: Palestine
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Well when the OBD2 port stop working,it means that you have to check the power line,or the earth,as you might have one having no signal,this way it will stop working,like any other plug in the car.
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Posted: Thu Mar 17, 2016 11:34 am |
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Joined: Feb 07, 2010
Posts: 2720
Trade Rating: +6
Location: UK
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Has it worked at all since the Omex was added?
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Posted: Thu Mar 17, 2016 4:41 pm |
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Joined: Feb 08, 2010
Posts: 7045
Trade Rating: +5
Location: In the garage
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Yes it did. My code reader would just show fault codes before rather than live data but not there's nothing. I will get the multimeter out this weekend.
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| 2001 GTi 138, Bilstein Sprint dampers, H&R springs, 21mm Peugeot Sport torsion bars, 22mm rear ARB, Peugeot Sport Group A wishbones, 283mm discs, Goodridge stainless hoses, Maniflow 304 grade 4-2-1 2.5" manifold and system, 200 cell cat, Richard Longman head, 45mm Jenvey throttle bodies, 9.5mm TB spacers, 90mm air horns, Jenvey throttle linkage, Jenvey fuel rail, Aeromotive and Goodridge fuel fittings and braided hose, ITG sausage filter, Radtec custom radiator, Piper Ultimate Road cams, Piper vernier pulleys, Omex 600 ECU. Saxo electric PAS pump, Vibra Technics engine mounts. Samco coolant hoses, TTV steel flywheel, 4.76 final drive ratio, 307 CC 180 ratios. 2019 BMW 530i. 2017 Mercedes C300 convertible. | |
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