Adjusting Engine Idle RPM - RIVA ECU Manager · Word doc. Adjusting Engine Idle RPM ... the MAP file can be retrieved or live data can monitored. ... (954) 247-0705 or by e-mail at

Word doc. Adjusting Engine Idle RPM – RIVA/Athena ECU © H1 7/23/13 1

Adjusting Engine Idle RPM

RIVA / Athena Pro-Series ECU’s (Direct Connect Models)

SEA-DOO YAMAHA RS11891-ECU-DC RY11841-ECU-DC

WARNING: Before proceeding ‘End of Line’ process must be performed. See Quick Start Guide for ‘End of Line’ procedure.

Target Idle RPM: YAMAHA: 1,550 RPM SEA-DOO: 1,800 RPM

Engine idle must be verified after engine reaches normal operating temperature. Craft must be in the water and pump under load. DO NOT RUN CRAFT OUT OF WATER!


Open Maya and expand window to Full Screen.

Connect the supplied Serial-to-USB adapter to the supplied Communication Cable.

Proceed to next page.

Serial-to-USB Adapter

Communication Cable


Connect the Serial-to-USB adapter to any USB 2.0 port on your PC.

NOTE: Serial-to-USB Adapter is not compatible with USB 3.0 ports.

Set Communication Cable to ‘Service Mode’.

Power up ECU.

YAMAHA: Connect Communication Cable to ECU lead labeled ‘MAIN’.

SEA-DOO: Connect Communication Cable to ECU lead labeled ‘MAIN’. Connect Lanyard.

NOTE: ECU will ‘Time Out’ after 30 seconds of inactivity.

YAMAHA: Disconnect Communication Cable from ‘MAIN’ lead on ECU. Press and hold ‘STOP’ button on START/STOP switch for 10 seconds. Reconnect Communication Cable to ‘MAIN’ lead on ECU.

SEA-DOO: Remove lanyard, wait 10 seconds and reconnect.


Service Mode: With wires DISCONNECTED.

Communications with the ECU are READ ONLY. Meaning the MAP file can be retrieved or live data can monitored. Lanyard must be connected to use this mode.

NOTE: Never leave in Service Mode for extended periods of time. This will drain the battery.


In Maya click ‘Communication > Read Map from ECU’ to open the ‘Select block’ window.

In the ‘Select block’ window select ‘ALL’ and click ‘OK’.


The ECU’s map will be loaded into Maya.

Once loaded click the ‘+’ symbol to the left of the MAP you wish to adjust.


Click the ‘+’ symbol to the left of ‘Matrix’ under the MAP you wish to adjust.

Select ‘PEDALT’ by double left clicking.


The ‘PEDALT’ tabular data will be displayed in the main window. Be sure you are viewing ‘Tabular View’ and not 3D View.

The values in the top row denote engine RPM.

The values in the left column denote PERCENTAGE OF HAND THROTTLE.



Beginning with the field for ‘0.00 Percent Hand Throttle & 1500 RPM’ left-click and hold while dragging the cursor down one row (2.00%) and then across to the right to ‘10000 RPM’.

All cells selected for values ‘0.00 & 2.00 Percent Hand Throttle’ and ‘1500~10000 RPM’.

WARNING: Select only the cells for rows 0.00 & 2.00 and columns 1500~10000.


Right-click any of the selected cells to open an option menu. Select ‘Edit’ to open the ‘Scale values’ window.

In the ‘Select values’ window change the ‘Gain’ value to ‘0’.

WARNING: ‘Gain’ value must always be set to ‘0’.


In the ‘Offset’ field change the value to increase or decrease the percentage of throttle opening. Click ‘OK’.

If idle rpm is off by 300+ increase Offset by 2.

If idle rpm is off by 300- increase Offset by 1.

EXAMPLE – Engine idle is 1700rpm. The value stored in PEDALT for 0.00 & 2.00 percent of hand throttle is 6.00. To raise the engine idle a value of 8 is entered into the Offset field.

WARNING: Never increase ‘Offset’ value by more than 2 increments at one time.

‘Gain’ value must always be set to ‘0’.



Verify ‘Offset’ value entered is correct.

WARNING: Never increase Offset by more than 2 at one time. Always verify value entered before proceeding.

Click ‘File > Preferences’ to open the ‘Setup Maya’ window.


If not already selected, click ‘Yes’ for ‘Enable hot keys for matrix/vector editing’. Then click ‘OK’.

Set the value for the cells and ‘0.00~2.00 Percent Hand Throttle’ and ‘0 RPM’ to a value of ‘9.00’ by editing them directly.

In the above example only cell ‘0.00 Percent Hand Throttle’ and ‘0 RPM’ need be changed. Click In that cell, type ‘9’ and ‘Enter’.


Beginning with the field for ‘0.00 Percent Hand Throttle’ and ‘0 RPM’ left-click and hold while dragging the cursor down one row (2.00 Percent Hand Throttle) and then across to the right to ‘1500 RPM’.

Right-click any of the selected cells to open an option menu. Select ‘Interpolate, along X’ to automatically scale the values.


Note the values are now graduated from high to low for cells ‘0.00 & 2.00 Percent Hand Throttle’ and ‘0~1000 RPM’.

Click ‘File > Save Map…’


Set Communication Cable to ‘Program Mode’.

Power up ECU.

YAMAHA: Connect Communication Cable to ECU lead labeled ‘MAIN’.

SEA-DOO: Connect Communication Cable to ECU lead labeled ‘MAIN’. Connect lanyard.

In Maya click ‘Communication > Download to ECU’ to send adjusted map to ECU.


Program Mode: With wires CONNECTED.

Communications with the ECU are PROGRAM ONLY. Meaning the MAP file can be sent to the ECU. Live data cannot be monitored in this mode. In this mode the ECU will not allow the engine to start. Lanyard must be connected to use this mode.

NOTE: Never leave in Program Mode for extended periods of time. This will drain the battery.


The ‘Programming procedure’ window will open. Wait 10 seconds and click ‘OK’ to continue.



Programming ECU Reference Images


Click ‘OK’ to continue.

Power down ECU.

YAMAHA: Press ‘STOP’ button on Start/Stop switch.

SEA-DOO: Remove lanyard from D.E.S.S. post.

Disconnect communication cable from ECU.

Replace terminal cap on ‘MAIN’ lead on ECU.

Verify engine idle rpm. Engine must be at operating temperature and pump under load (in the water). DO NOT RUN CRAFT OUT OF WATER. Repeat process beginning with page 7 to further adjust Engine Idle RPM.

Target Idle RPM:

YAMAHA: 1,550 RPM

SEA-DOO: 1,800 RPM

Remember, the water belongs to everyone. Please ride responsibly and respect the environment!

Technical Support

For answers to questions regarding installation or trouble shooting RIVA Performance Products contact: RIVA Technical Support directly at (954) 247-0705 or by e-mail at [email protected].

Documents

Adjusting Engine Idle RPM - RIVA ECU Manager · Word doc. Adjusting Engine Idle RPM ... the MAP file can be retrieved or live data can monitored. ... (954) 247-0705 or by e-mail at