Suzuki DF200 Service Manual page 74

IAT (Intake Air Temperature) SENSOR
The IAT sensor is installed on the bottom of the ring gear cover
and air intake silencer case and used to detect the intake air
temperature.
This sensor is the same type as the cylinder temperature sen-
sor, and inputs a signal to the ECM as a voltage value.
This signal is used to compensate the fuel injection time dura-
tion.
MAP (Manifold Absolute Pressure) SENSOR
The MAP sensor is installed on the collector assembly (top side)
and used to detect the intake manifold (surge tank) pressure.
It also detects the barometric pressure before starting the
engine. This sensor inputs the intake manifold (surge tank) pres-
sure to the ECM as a voltage value.
This input signal is used as the fundamental signal to determine
fuel injection time duration, ignition timing, etc.
TPS (Throttle Position Sensor)
The TPS is installed on the PORT side throttle body and detects
the throttle opening with the throttle shaft interlocked.
This sensor is a variable resistor changing resistance (Ohms) in
accordance with the throttle opening.
The varying resistance value is converted to voltage and input to
the ECM.
Based on the TPS voltage, the ECM calculates the idle position
and throttle opening and determines the control modes of vari-
ous controls systems (Idle air control, VVT system control, Fuel
injection control system, etc.).
NEUTRAL SWITCH
The neutral switch is installed on the throttle lever holder and
used to detect the shift position.
This switch is "ON" in neutral and "OFF" in forward or reverse.
Based on the switch' shift position signal input, the ECM per-
forms the following controls:
• When the shift is in forward or reverse at the time of engine
start, no power is supplied to starter motor relay preventing
starter motor engagement.
(Start-in-gear protection. See page 3-46.)
ENGINE CONTROL SYSTEM
2
1
1. IAT sensor
2. Air intake silencer case
MAP sensor
Throttle position
sensor
Neutral switch
3-13