DAELIM VJF125 Service Manual - page 67

EMS(Engine Management System)

5-15

Check the MAPAT Circuit(Intake Pressure Sensor (IMP)+Intake Temperature Sensor(TBA))’s circuit

Fault code number is displayed by MIL

The Fault code of intake pressure sensor          The Fault code of intake temperature sensor

Checking circuit

Coupler terminal is based on the side of wire-harness

CHECKING PROCEDURE

1) Turn off the ignition key .

2) Check to see if the MAPAT coupler has come loose or the wire is peeling off.

If there is normal, measured the input voltage of MAPAT’s coupler.

3) Disassemble the coupler of MAPAT and turn on the ignition key

4) Measure the input voltage of MAPAT (intake pressure sensor + intake temperature sensor)’s coupler. 

Input voltage : 4.5 ~ 5.5[V] 

Measuring terminal : 

MAPAT 3 terminal ~

MAPAT 1 terminal

Remarks : Measuring unit of voltage : voltage [V] 

If voltage value is not normal,

Check to see if the ECU coupler is loose or if there is a bad contact.

Check the ‘P’ electric wire, ‘P/G’ electric wire, ‘P/L’ to see if they have been broken short-circuited

Remark : refer to (5-16) if the intake pressure sensor is broken

refer to (5-16) if the intake temperature sensor is broken

5)After fault repaired, To erase the memorized fault code in the ECU is refer to how to remove the fault code(5-10).

ECU

MAPAT 

3 : Inhalation pressure 

sensor  GROUND 

26 : 5V voltage   

27 : IMP    28 : TBA

3 : Intake pressure sensor  ground

26 : 5V voltage 

27 : IMP  

28 : TBA