Renault Scenic: Specs, Problems & Review

Vehicle: Renault Scenic 1.6i 16V, manufactured in February 2002.

CAN baud rate: 250 kbit/s.
Identifier: 11Bit

The speed is located in the first two bytes of the message and has a value of 741h.

hi,

'By any chance, do you know how to convert the speed value into a real number? Regarding the RPM, I read that each byte represents a quarter of a revolution (so, convert the hexadecimal value to decimal and then multiply by 0.25).'

Ah yes, 0x201, bytes 5 and 6 are, as far as I know, related to the steering angle (at least in the Laguna).

Best regards, Matthias.

The speed is resolved with a factor of 1/128. For the value 0x558 in frame 741, this would be 0x558 * (1/128) = 10.69 km/h.

The factor of 1/128 is commonly used for speed. The SAE J2178-2 specification defines this as a high-resolution factor, applicable to both English and metric speed units. There's also a low-resolution option where only a factor of 1 is used.

The factor of 1/4 for the speed is also common, but it only applies to high resolution. For low resolution, a value of 16 or 32 is used.

hi,

Okay, thank you Mictronics, that has already helped me a lot. But now I have another problem, or rather several. Like Fuchs, I also own a Renault, so I assume the IDs are the same. However, the accelerator pedal position doesn't seem to be correct for me. It always shows '8' on my display:

Identifier: fa
Data: 1a 90 39 8 60 27 27

'I'm also unsure about the speed. I'm getting approximately 0x18fe when idling, which would be around 1600 RPM at 1/4 speed. But at 1/16 speed, it's only 400 RPM... Does anyone know the exact conversion value, or have I just made a mistake in my calculations?'

And finally, I have one more observation. The number displayed for the gear position has changed. Initially, it was 20 or 60, but after a short time, it became 21 or 61. Is the gear still being transmitted correctly? I drove forward and backward once each, but when starting the engine, it was in forward gear. Therefore, the number should have changed three times, not just twice. Does anyone know what this might be related to?

'Thank you.'
Best regards, tester123.

hi,

After taking some time for this project (which is unfortunately not the only one I'm working on this semester), I found a few more things. I'll post them here because I suspect that the Laguna and the Senic aren't very different. Maybe someone will find it interesting.

Okay, the resolution seems to be at 1/8. At least, I'm getting very meaningful values. However, the value of 1/128 for speed is incorrect. Today, I drove a bit and noticed deviations of up to 30 km/h.

additional IDs:

ID 0x201
Bytes 5 and 6: Steering wheel position.

ID 0x386
byte 6 - Reverse gear.

ID 0x711
byte 1 - Parking brake.

ID 0x741
byte 5 - ESP

ID 0x766
byte 1 - Light
byte 3 - Central locking system.
byte 4 - possibly outside temperature (I'm not sure)
byte 6 - Idle.
byte 7 - Reverse gear.
byte 8 - clutch and turn signals.

ID 0x77A
byte 5 - Cruise control.

Okay, I think that's all for now. I'm not sure about the outside temperature. I read that at that temperature, you have a 40-degree offset and it's resolved in increments of 1 degree.
'Oh, and could it be that things like a door being open...'
Is there a window at the bottom of the bus that isn't showing up on the map? Or do you have to request this kind of data?

Okay, I only have one more question now. Does anyone know how to read the error codes?

That's all from me.
Best regards, tester123.