ECM Functions

Reset ECU

This will clear all learnt values for Idle Control and AFR Learning including Fuel Trims.

Idle Learning

This will commence an auto learn airflow/throttle balance sequence, ensure that the Engine and TCM are over 65 deg C, the vehicle is in Park with handbrake ON and no DTCs are current or historic then start the auto learn sequence. See the detailed Idle Learning Air Volume sequence on the following pages.

Power Balance

Will cut individual fuel injectors to help isolate problem cylinders.

Throttle Valve Closed Position Learning

This function will initial the ECM to learn the throttle motor butterfly closed position

1. Make sure Accel pedal is fully released
2. Turn Ignition ON
3. Turn the Ignition OFF and wait 10 seconds
4. Listen to the throttle motor during this time period and ensure it drives back to its base position.

Idle Learning Air Volume

This function will balance the 2 x throttle motor butterflies for idle stability. This should be performed in the following situation

• If the Idle is unstable
• If the throttle voltage or Mass Air Flow between banks is seriously different
• If the AFR is different between the banks
• If the Intakes have been replaced and the MAFs rescaled
• After the tuning process if finished and the vehicle will be returned to the customer
  
  

Now using the ProECU ECM Special Tool, start the engine and allow it to Idle and select the Idle Learning feature and follow the on-screen instructions.

Neutral Position Sensor Learning

If the Gear Position indicator is flashing N on a manual transmission vehicle then the ECM has lost the base learning voltage for the neutral position switch and the following sequence will need to be carried out to reset the learnt base position using the following sequence.

NOTE: If you cannot make the sequence work then we suggest you use a stop watch to ensure the time periods are accurate, this Nissan learning sequence is difficult to follow but it does work. It’s important that from turning the ignition ON to the end of the 5 clutch depresses and the release of the SPORT button that the time needs to be less than 26 seconds for this to be successful.

How to carry out the Neutral Position Learning Sequence:

1. Turn ignition switch ON and wait 5 seconds.
2. Within 5 seconds repeat the following operation 3 times.
3. Fully depress and fully release clutch pedal while pressing and holding S-MODE switch.
4. Wait 3 seconds while S-MODE switch is released. 4) Wait 5 seconds while pressing S-MODE switch.
5. Wait 3 seconds while S-MODE switch is released.
6. Within 5 seconds repeat the following operation 5 times.
7. Fully depress and fully release clutch pedal while pressing and holding S-MODE switch.
8. The ECM now starts the Neutral Position Learning sequence. 
9. Once finished the shift position indicator on the dash blinks for 5 seconds to let you know it's completed.
10. If gear position indicator does not blink or blinks continuously then return to start and repeat the sequence. The timing between each step is crucial for the sequence to work and it may take several attempts to make it work!

NOTE : We believe this same procedure can be used on the new Nissan Z / 400Z when equipped with the manual transmission. We have seen one example where this has been used in the field to correctly resolve the same error and flashing "N" gear indicator on the dashboard. This was used on a 2023 USDM car. 

ABS Tool

Steering Wheel Alignment 

This will reset the base learned position for the steering wheel, ensure the steering wheel is straight before commencing this learning procedure.

Fuel Pump Tool

Main Fuel Pump ON/OFF

This will allow you to turn ON and OFF the fuel pump to establish if the pump is working or not.  Another potential use is to pressurize the fuel system to check for leaks, or drain the tank by disconnecting a fuel line and running the fuel into some sort of fuel can.