Reading Volvo 850 1996 Non-Turbo Codes

[BeerDeer]

Hi,

As you know, I’ve been reaching out frequently over the past few weeks regarding my car issues.

Thankfully, I’m making progress! I recently received my Veepeak OBDCheck BLE+ Bluetooth OBD II EOBD Diagnostic Device Adapter, which I’m using with the 850 OBD-II app (I believe this is the correct one, right?).

Initially, I had trouble connecting via OBD-II and Motronic 4.4, so I switched to COMBI, which seemed to work.

I’ve scanned for codes, and here’s the output. Could you take a look and let me know if anything seems wrong? Should I clear the codes and rescan for accuracy, or is this good for analysis?

Thank you in advance for your help!

[BeerDeer]

Am I understanding right?

Fuel Level Signal (CI-113): Persistent fuel sensor or wiring problem. (Was it because I disconnected MAF to clean it?)
ABS-314 and ABS-324: Problems with the right rear wheel ABS sensor or related circuitry.

[xanthefin]

Fuel Level Signal (CI-113): Persistent fuel sensor or wiring problem.


Its Fault Free Counter (249) is almost 255 where it clears automatically code then and vanishes by itself. So its not active code only happened by looking FreezeFrame 2 thousand km ago.

If Standard OBD wasnt connected then i dont wait there being a Motronic M4.4 and more likely M4.3 but can confirm the from the label under the hood the ECM type when know Part Number.

The Standard OBDII from Scan is if i can guess by looking ECU address 1F and what it supports just Transmission answering.

[BeerDeer]

Fuel Level Signal (CI-113): Persistent fuel sensor or wiring problem.


Its Fault Free Counter (249) is almost 255 where it clears automatically code then and vanishes by itself. So its not active code only happened by looking FreezeFrame 2 thousand km ago.

If Standard OBD wasnt connected then i dont wait there being a Motronic M4.4 and more likely M4.3 but can confirm the from the label under the hood the ECM type when know Part Number.

The Standard OBDII from Scan is if i can guess by looking ECU address 1F and what it supports just Transmission answering.

Let me check.

The APP doesn't have Motronic M4.3. Is "COMBI" the only way to read codes?

[misha]

Combi is instrument cluster module.

[xanthefin]

Fuel Level Signal (CI-113): Persistent fuel sensor or wiring problem.


Its Fault Free Counter (249) is almost 255 where it clears automatically code then and vanishes by itself. So its not active code only happened by looking FreezeFrame 2 thousand km ago.

If Standard OBD wasnt connected then i dont wait there being a Motronic M4.4 and more likely M4.3 but can confirm the from the label under the hood the ECM type when know Part Number.

The Standard OBDII from Scan is if i can guess by looking ECU address 1F and what it supports just Transmission answering.

Let me check.

The APP doesn't have Motronic M4.3. Is "COMBI" the only way to read codes?

Its written that M4.3 is not supported by OBDII port with ELM interfaces.
Only Volvo official tool VST understands the full scale that old protocol. Otherwise just with Volvo diagnostics type 1 or 2 (i forgot from my head) aka LED light flashing is to read those then additionally.

There is some ECM errors possible to come through indirectly via COMBI like Speed / RPM / Crank sensor faults.. then some error codes can come through Gearbox like Accelerator Pedal issues etc... (need check and make list what all but just give an idea).

As misha says.. COMBI is Instrument panel.

[BeerDeer]

Fuel Level Signal (CI-113): Persistent fuel sensor or wiring problem.


Its Fault Free Counter (249) is almost 255 where it clears automatically code then and vanishes by itself. So its not active code only happened by looking FreezeFrame 2 thousand km ago.

If Standard OBD wasnt connected then i dont wait there being a Motronic M4.4 and more likely M4.3 but can confirm the from the label under the hood the ECM type when know Part Number.

The Standard OBDII from Scan is if i can guess by looking ECU address 1F and what it supports just Transmission answering.

Let me check.

The APP doesn't have Motronic M4.3. Is "COMBI" the only way to read codes?

Its written that M4.3 is not supported by OBDII port with ELM interfaces.
Only Volvo official tool VST understands the full scale that old protocol. Otherwise just with Volvo diagnostics type 1 or 2 (i forgot from my head) aka LED light flashing is to read those then additionally.

There is some ECM errors possible to come through indirectly via COMBI like Speed / RPM / Crank sensor faults.. then some error codes can come through Gearbox like Accelerator Pedal issues etc... (need check and make list what all but just give an idea).

As misha says.. COMBI is Instrument panel.

Hi there,

I’ve got the OBD-II app and the ELM device that was recommended (same model others suggested). I’ve successfully reset the old codes as well as the service light, so progress is being made!

Now, I’d like to understand the best way to use the app and device to check engine or transmission or any codes. Since my car is a Volvo 850 (1996), I believe it uses the Motronic M4.3 system. Could you guide me on how to configure the app and connect properly for this specific system? Any tips or steps would be greatly appreciated!

Is it possible to read the engine and transmission codes using the OBD-II app and the ELM device I have? Or is my car’s system (Volvo 850, 1996, Motronic M4.3) incompatible with this setup?

If I can’t read the codes with this combination, do I need a different device or tool to access them? Any recommendations would be helpful!

Thanks in advance!

[xanthefin]

Let me check.

The APP doesn't have Motronic M4.3. Is "COMBI" the only way to read codes?

Its written that M4.3 is not supported by OBDII port with ELM interfaces.
Only Volvo official tool VST understands the full scale that old protocol. Otherwise just with Volvo diagnostics type 1 or 2 (i forgot from my head) aka LED light flashing is to read those then additionally.

There is some ECM errors possible to come through indirectly via COMBI like Speed / RPM / Crank sensor faults.. then some error codes can come through Gearbox like Accelerator Pedal issues etc... (need check and make list what all but just give an idea).

As misha says.. COMBI is Instrument panel.

Hi there,

I’ve got the OBD-II app and the ELM device that was recommended (same model others suggested). I’ve successfully reset the old codes as well as the service light, so progress is being made!

Now, I’d like to understand the best way to use the app and device to check engine or transmission or any codes. Since my car is a Volvo 850 (1996), I believe it uses the Motronic M4.3 system. Could you guide me on how to configure the app and connect properly for this specific system? Any tips or steps would be greatly appreciated!

Is it possible to read the engine and transmission codes using the OBD-II app and the ELM device I have? Or is my car’s system (Volvo 850, 1996, Motronic M4.3) incompatible with this setup?

If I can’t read the codes with this combination, do I need a different device or tool to access them? Any recommendations would be helpful!

Thanks in advance!

Hi, App doesnt support M4.3 Engine ECU sorry. You need leave that option out.

On 850 models you can see information (Fault Codes, Live Data) / Read Codes / *Trigger Device testings and *Program parameters via OBDII from these ECUs

Motronic M4.4*
MSA15.7*
AW50-42 (Automatic Gearbox)*
ABS*
SRS (Airbag)
COMBI (VDO dashboard)*
Front Electric Seats*
IMMO*



Transmission it does as you seen from Summary view its there readen and no codes. So to read fault codes is from Service >> Scan (and select ECUs you have on car | Selection viewavle ECUs Default is "All" and then some models and years of Volvos but example next update there will be too 850 Series selection to limit out 70 series ECUs like VGLA, ECC etc..) it says these days below it if ECU had codes or no codes in same view. Example in Screenshots ECU 58 (SRS) -- Module information -- and next there below is "ECU: 58 No fault codes reported".
Then next ECU 6E (AW 50-42) [This is Transmission] -- and below again ECU: 6E No fault codes reported.. So gearbox doesnt have fault codes.



Only old - not anymore produced for decades - Volvo System Tester which Volvo used internally and their dealerships do in full length support (additionally to ex. led light way to read codes via OBDII port pin #3 it only supports Live Data) M4.3 as it uses older Volvo diagnostics system protocol but it has a side protocol which is just led light and switch system to read it which older 850 models ( pre 96 ) had own diagnostic box under bonnet to read codes.


The system you looking for costs anything between 300 EUR to here if you even manage find one from market used.



So far only in plans is write support for Fenix 5.2 ECM in App with special ways in future but not yet in to do list. It might use same commands as Motronic M4.3 but i cant confirm as i dont own that ECM.

[BeerDeer]

Its written that M4.3 is not supported by OBDII port with ELM interfaces.
Only Volvo official tool VST understands the full scale that old protocol. Otherwise just with Volvo diagnostics type 1 or 2 (i forgot from my head) aka LED light flashing is to read those then additionally.

There is some ECM errors possible to come through indirectly via COMBI like Speed / RPM / Crank sensor faults.. then some error codes can come through Gearbox like Accelerator Pedal issues etc... (need check and make list what all but just give an idea).

As misha says.. COMBI is Instrument panel.

Hi there,

I’ve got the OBD-II app and the ELM device that was recommended (same model others suggested). I’ve successfully reset the old codes as well as the service light, so progress is being made!

Now, I’d like to understand the best way to use the app and device to check engine or transmission or any codes. Since my car is a Volvo 850 (1996), I believe it uses the Motronic M4.3 system. Could you guide me on how to configure the app and connect properly for this specific system? Any tips or steps would be greatly appreciated!

Is it possible to read the engine and transmission codes using the OBD-II app and the ELM device I have? Or is my car’s system (Volvo 850, 1996, Motronic M4.3) incompatible with this setup?

If I can’t read the codes with this combination, do I need a different device or tool to access them? Any recommendations would be helpful!

Thanks in advance!

Hi, App doesnt support M4.3 Engine ECU sorry. You need leave that option out.

On 850 models you can see information (Fault Codes, Live Data) / Read Codes / *Trigger Device testings and *Program parameters via OBDII from these ECUs

Motronic M4.4*
MSA15.7*
AW50-42 (Automatic Gearbox)*
ABS*
SRS (Airbag)
COMBI (VDO dashboard)*
Front Electric Seats*
IMMO*



Transmission it does as you seen from Summary view its there readen and no codes. So to read fault codes is from Service >> Scan (and select ECUs you have on car | Selection viewavle ECUs Default is "All" and then some models and years of Volvos but example next update there will be too 850 Series selection to limit out 70 series ECUs like VGLA, ECC etc..) it says these days below it if ECU had codes or no codes in same view. Example in Screenshots ECU 58 (SRS) -- Module information -- and next there below is "ECU: 58 No fault codes reported".
Then next ECU 6E (AW 50-42) [This is Transmission] -- and below again ECU: 6E No fault codes reported.. So gearbox doesnt have fault codes.



Only old - not anymore produced for decades - Volvo System Tester which Volvo used internally and their dealerships do in full length support (additionally to ex. led light way to read codes via OBDII port pin #3 it only supports Live Data) M4.3 as it uses older Volvo diagnostics system protocol but it has a side protocol which is just led light and switch system to read it which older 850 models ( pre 96 ) had own diagnostic box under bonnet to read codes.


The system you looking for costs anything between 300 EUR to here if you even manage find one from market used.



So far only in plans is write support for Fenix 5.2 ECM in App with special ways in future but not yet in to do list. It might use same commands as Motronic M4.3 but i cant confirm as i dont own that ECM.

Hi,

I’m exploring my options here and wondering if flashing my system to Motronic M4.4 would be a good idea. I’d like to avoid spending $3,000 on a professional reader, so I’m looking for cost-effective alternatives.

Today, I managed to read and scan codes using the OBD-II app and device again. However, I noticed some limitations:

- I can’t access live OBD-II data, but I can view live data when using the COMBI option.
- I performed tests using the OBD-II connection. For example, I tested the ABS and heard the valves activating in the car, which seems to confirm the connection is functional for tests.
- When I select OBD-II and press "scan codes," it seems to scan for issues but doesn’t return any errors. Is it actually scanning for codes, or could it be missing something?

Given these observations, what are my choices moving forward? Should I stick with my current setup, consider flashing to M4.4, or look into alternative tools? Any advice or recommendations would be greatly appreciated.

[misha]

You can make your own flash code reader with a few wires,led and resistor for reading m4.3,Jetronic & Siemens ecu...along with ECC.
850 obdII app can be used for the rest of modules in the car.