ECU Master TUNER3 Manuel de service télécharger pdf (Page 29)

Factory MAP/MAF sensor

In Fuel Implant technology controlling the injectors is fully based on DET3 device. However the factory ECU

has to constantly receive a correct signal from factory MAP sensor / flowmeter for accurate determination of the

ignition angle and in order to avoid working in limp mode.

There are a few possibilities of solving this problem.

In case of a naturally aspirated engines, factory MAP sensor / flowmeter connected to ECU and mounted on a

serial place of the intake system, can be applied. If the flowmeter makes an restriction in the intake system,

conversion from MAF to MAP should be done (more on the topic can be found in the manual of DET3 device).

In case of a naturally aspirated engines, altered to be a turbocharged one, or a turbocharged car with increased

boost pressure, leaving the original MAP sensor / flowmeter will cause going into limp mode at the moment

when the boost appears (or exceeding the maximum pressure / flow) because the sensor will reach its maximum

range (voltage). In order to solve this problem, there are a few options. In case of MAP sensor / flowmeter that

will remain in place of the factory montage a voltage limiter can be used with the use of a resistor and Zener’s

diode:

Available on the market are diodes 4V3 and 4V7, that will reduce the voltage accordingly do about 4,3V and

4,7V.

A different possibility is to connect a factory MAP/MAF sensor to an additional analog input ( Tables Switch

Input pin 2) and the analog output Analog Out (pin 17) to ECU and limiting the voltage in the Setup/Analog

Output Configuration menu with the Analog Out Max option. Information regarding the topic of configuration of

additional analog input can be found in the Tables Switch Input.

In case of MAF sensor another possibility is to make a conversion from MAF to MAP.

MAF/MAP ECU

10K

4V7

MAF/MAP

ECU

2 Tables Switch

Analog Out 17

DET3

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ECU Master TUNER3 Manuel de service Page 29