Syvecs LTD Lam2CAN Lambda Controller User Manual

V1.1
Lam2CAN

This document is intended for use by a technical audience and describes a number of procedures that are potentially hazardous. Installations should be carried out by competent persons only.
Syvecs and the author accept no liability for any damage caused by the incorrect installation or configuration of the equipment.
Note: Due to regular firmware development, images shown might not be the same as more recent firmware versions, please check our forums for updated manuals and changes. Support can be obtained by contacting your Syvecs dealer.
[email protected]

Introduction

The Syvecs Lam2CAN is an 8 Channel NTK Lambda sensor CAN interface with comprehensive onboard fault logic. It also includes dual dedicated exhaust pressure sensor inputs enabling compensaon for the effects of exhaust pressure on the lambda measurement. Data from the Lam2CAN is then transmied via CAN to provide fast and accurate data.

Specification

Outputs
8 x Lambda Heater Outputs – 10Amp Peak (100ms) / 6Amp Continuous
1 x 5V Sensor Supply (400ma Max)
Inputs
2 x Analogue Exhaust Pressure Sensor inputs (0-5V)
Interfaces
USB C For Updates and Configuration
1 x CAN 2.0B, fully user programmable
Power Supply
6 to 26V ignition switched supply
Physical
34 Way AMP Super seal connector
Environmental
High-quality anodized CNC aluminum body and military spec wiring (Tyco Spec44) ensures a rigorous and long-term use.

Pin Connections

General Connections

Connecting Power/Ground
The Lam2CAN unit needs a single ignition 12v supply and dual ground connection, large size wire gauge (min AWG16) is important on the grounds as the lambda heaters consume a lot of current.
Note: Suggest to Fuse the 12v supply to the Lam2CAN with 5 Amp fuse.

Example Schematic

Figure 0-1 – Power and Ground Feeds

Pin Schedule

Input Connections

Exhaust Pressure AN Inputs
Two Analogue Inputs are available on the Lam2CAN. These are just 0-5v analogue inputs and cannot support frequency waveforms. They are designed just for pressure transducers.
Wiring Guidance
Example Schematic

Exhaust Pressure Sensor
Pin Schedule

Lambda Heater Outputs

There are eight low side outputs available on the Lam2CAN to drive 8 NTK Lambda heater circuits. The outputs support 10 amp peak/ 6amp continuous loads, but please be aware that . Fault logic is also present on these outputs to check if a sensor is unplugged or damaged.
Wiring Guidance
The NTK Lambda heaters consumer around 3-4amps of current at 13v each, ensure you use the correct size wire gauge AWG18 or less for the heater wiring and make sure the lam2CAN Ground connections are both populated and  AWG16.

Example Schematic

Lambda Heater
Pin Schedule

Lambda Wiring

Mounting Recommendation

If fiting a Sensor in the Exhaust manifold its good to use a bung which has a heat-sink present. Like below
https://vibrantperformance.com/heat-sink-o2-sensor-weld-bung/

Example Wiring

Lambda Connections
The following table lists all the connections for all 8 lambda sensors. It’s important to note that the heater supply must be fused. 15Amp fuse for 4 Lambda heaters or 7.5Amp per pair of sensors.

_
1| Blue| Heater Drive| 2| 3| 4| 5| 6| 7| 8| 9
2| Yellow| Heater| 12v Fused Supply| 12v Fused Supply
6| Grey| Nernst Cell
Voltage| 27| 28| 29| 30| 31| 32| 33| 34
7| White| Ion Pump Current| 18| 19| 20| 21| 22| 23| 24| 25
8| Black|  Signal Ground| 13| 14

Lambda Fault Logic

The Lam2CAN has onboard fault detection to ensure that in the event of a sensor or heater circuit failure it is spotted and a diagnostic flag is set. Calibrators will be made aware of the issue by 2 systems.
First the Error System in Scal will prompt the user of an issue by causing Device to flash red at the top of the screen. Inside the Error area it will display the sensor in fault and a reason.

The Items in Scal LamDiag1 to LamDiag8 will set a decimal value to flag which error is present and can be decoded below:

In the event of a Lambda fault the heater circuit will be shutdown for the sensor in fault.

CanBus Communications

Common Area Network Bus (CAN Bus) is a widely used data interface, common used in many cars and a er-market accessories, such as Data loggers and Dashes. The Lam2CAN has 1 x CAN bus interface and it does not have 120ohm  termination resistors present, so a 120ohm external termination resistor will be required if the Lam2CAN is the single node on the bus.

Lam2CAN supports direct CAN connection to the vehicle or ECU data bus. This is a very powerful way of getting very fast real me data out to other modules. It also supports Generic Receive CAN to allow the Exhaust pressure sensors to  be sent into the Lam2CAN via CAN data.
As Default the Lam2CAN sends out CAN data in the following format but it is fully configurable to can be setup to suit any ECU or CAN System.
CAN Speed : 1MB
CAN Format : MSB

Syvecs LAM2CAN Stream

Identifier| DLC| Byte 0| Byte 1| Byte 2 I Byte 3| Byte 4| Byte 5| Byte 6| Byte7
---|---|---|---|---|---|---|---|---
0x200| 8| Lam1 – DIV1000| Lam1 – DIV1000| Lam1 – DIV1000| Lam1 – DIV1000
0x201| 8| Lanni- DIV1000| Lam1 – DIV1000| Lam1 – DIV1000| Lam1 – DIV1000
0x202| 8| Lam Bank 1 DIV1000| Lam Bank 2 DIV1000| Ex Pressure 1
mbar/1| Ex Pressure 2
mbar/1
0x203| 8| Lambda Heaterl –
%/81.92| Lambda Heater2 –
%/81.92| Lambda Heater3 –
%/81.92| Lambda Heater4 –
%/81.92
0x204| 8| Lambda Heater5 –
%/81.92| Lambda Heater6 –
%/81.92| Lambda Heater7 –
%/81.92| Lambda Heater8 –
%/81.92
0x205| 8| LamDiagl – BitWise| LamDiag2 – BitWise| LamDiag3 – BitWise| LamDiag4 – BitWise

Lambda Diagnostics CAN bits:

Motec LTC Stream

Identifier| DLC| Byte 0| Byte 1| 1 Byte 2| Byte 3| Byte 4| Byte 5| Byte 6| Byte?
---|---|---|---|---|---|---|---|---|---
0x460| 8| | Lam1 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x461| 8| | Lam2 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x462| 8| | Lam3 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x463| 8| | Lam4 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x464| 8| | Lam5 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x465| 8| | Lam6 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x466| 8| | Lam? – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x467| 8| | Lam8 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x468| 8| | Lam Bank 1- DIV1000| | | Board Temp| Diagnostic| HeaterDuty
0x469| 8| | Lam Bank 2 – DIV1000| | | Board Temp| Diagnostic| HeaterDuty

Lambda Diagnostics CAN bits:

Generic Can Receive
The generic CAN receive section allows for calibrators to setup the items they wish to receive on the Lam2CAN by setting the Identifier, Start Bit, Length, and scaling.
The easier way to setup the Generic CAN is to create a worksheet and add in all the maps like below to make each CANRX* maps line up.

Above you can see the Exhaust Pressure 1 is setup to be received from CAN ID 0x600, data is not Little Endian, value is signed, scaling is 1.00 and is being picked up from start bit 0 with a length of 16 bits. More info can be found on www.voutube.com/SyvecsHelp. Search for Generic Can Receive and worksheets.
Please note: Any Item which is assigned in Pin Assignments will take its data from the Pin assignment and ignore the Generic CAN Rx data.

PC Connection – SCAL

In order for the Lam2CAN to work it must have a valid calibration present in the device and when shipping from the factory a default calibration is loaded to ensure calibrator’s setup the configuration to suit the installation.
A USB C port is found on the back of the Lam2CAN which is used for calibration changes on the device.
The S-Suite software can be downloaded from below. https://www.svvecs.com/software/
After running the SSuite installer, open SCal and click Device > Connect. You will be asked “How do you wish to access this device”. Click OK.
Next you can load a calibration if you have one saved from a previous installation or program defaults if new installation.

The Lam2CAN will now connect. This status will be displayed in on the top right hand corner of SCal.
A green indicator and Connected will be displayed.

TIP When navigating within SCaI you will note that some configuration settings are in blue and others green. All green settings take effect immediately, and do not require programming. Settings highlighted in blue need to be programmed before the changes take effect.
Calibrators now have the ability to setup and monitor the Lam2CAN live.
Press Fl for help on any map and remember that Calibration names highlights in Green are adjustable Live and changes are immediate. Blue Maps require programming (Device > Program) to take effect.

Lam2CAN Software Setup

Lambda Selection
The Lam2CAN has eight NTK Lambda circuits present and depending on how many you have connected effects how you setup the software. Pin Assignments — I/O Configuration is where you need to assign the lambda circuit used and the heater output used.
Assign the Lambda circuit used by double clicking on the corresponding lambda.

Next assign the Lambda heater output

For 8 Channels your i/o configuration should look like below 

Lambda Bank Assignment
Average banked Lambda values are available with the LAM2CAN. LamBank1 and LamBank2… These are useful for ECU systems which don’t support individual cylinder lambda control.
Users must assign which sensors are part of which bank in the Lambda Bank Allocation map.

Set either bank1 or bank2 for each lambda sensor. This is important for the Exhaust pressure trims to ensure the correct pressure adjustment it applied to the correct signals.
Lambda Linearisation
The default values in the Lambda Linearisation maps are setup for an LZA09-E1 sensors, if you are using a different sensor like a motortsport L1H1. You can change the linearisation here to suit. ![Syvecs LTD Lam2CAN Lambda Controller

• Software 6](https://manuals.plus/wp-content/uploads/2023/08/Syvecs-LTD- Lam2CAN-Lambda-Controller-Software-6.jpg)

Scal has a Sensor database which contains a L1H1 Calibration if required

Exhaust Pressure Sensor Setup
The Lam2CAN supports two 0-5v Pressure signals which are used to adjust the Lambda signals based on pressure in the location lambda sensors are fitted. With sensors fitted in the exhaust manifold (pre turbo) this is important as the lambda value changes significantly with different pressures in the lambda cell.
The Exhaust pressures sensors can be either assigned in the I/O Configuration — Pin Assignments or picked up over CAN using our generic receive CAN code from another control unit.
Once assigned the calibrator can head to the sensors area to setup the input assigned.
Input High Voltage Error Threshold — Sets the high voltage level for which the TinyDash will class the input in Error
Input Low Voltage Error Threshold — Sets the low voltage level for which the TinyDash will class the input in Error
Default Sensor Reading — When the input is in Error the value in this map will applied on the Item
Filter Constant — Amount of recursive filtering to be applied to the Signal, higher the value = more filtering
Linearisation — Sets the input voltage to sensor units applied on the item
Exhaust Pressure 1 will be assigned to Bank1 lambda sensors and Exhaust Pressure 2 will be assigned to Bank2 lambda sensors.
Ensure the Lambda bank allocation on is setup under Lambda Setup as shown below.

Gauges and Worksheets

Scal has the ability to have lots of custom gauges and trace layouts to monitor all the data from the Lam2CAN on screen
A good help video on this can be found here – https://www.youtube.com/watch?v=srlMwJwdhDw&t=339s

Custom worksheets can also be setup to have multiple maps open and laid out in a unique manner.
Here is a help video on how to do this – https://www.youtube.com/watch?v=X0W7BOigHFQ

Output Testing

The Lam2CAN outputs can be tested live with our Syvecs – Scal program and information on connecting to the unit can be found in the PC Connection section of the manual. After connecting to the unit via USB, users will see an area at the bottom of the calibration tree called output testing.
Here users are able to test the functions of each output outside the normal strategies on the Lam2CAN.
NOTE: / Low Side Output Frequency maps must be set and programmed onto the device for the output testing logic of these outputs to apply. You cannot change these maps when Output Test Mode Enable is enabled.
Remember that Calibration names highlights in Green are adjustable Live and changes are immediate. Blue Maps require programming (Device > Program) to take effect.
Set a frequency you wish the outputs to be driven at in LowSide Output Frequency. Device — Program for it to be saved. Then enable Output Test Mode Enable map.
Now you can then set a duty for each output to be driven in Low Side Output Test Duty, these maps can be adjusted live.

Strategy Help

All the strategies/maps on the Lam2CAN controller have help text available for them. This is shown by pressing F1 on the keyboard when in Scal when a calibration is open.

References

• Bosch LSU 4.9 Heat Sink O2 Bung - Vibrant Performance

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