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1.2L REVOTRON ENGINE
163
Connector View :
Connector Details:
Connector
Description
1
M -
Motor (-)
2
IPM
Poti (-)
3
UIP
Poti (+)
4
M +
Motor (+)
5
IP2S
Poti (2)
6
IP1S
Poti (1)
Component Specification :
The throttle body contains an actuator, a throttle
plate
and
a
throttle
position
sensor
(potentiometer), which are integrated into one
housing. The actuator consists of a DC-Motor and
a two-stage gear. The throttle position sensor is
redundant and provides two output signals. In
case of an electrical disconnection, the throttle
plate returns to an idle default position (LHP)
which is between lower and upper mechanical
stops (LMS and UMS, respectively).
The throttle position sensor is mounted on intake
manifold upstream side and is a part of integrated
throttle body. The TPS is mounted using a screw
and tighten to the specified torque. The throttle
lever is extended to crank lever which operates
the sensor, wherein the circuit resistance varies
depending on the variation of movement of
throttle lever. The throttle position sensor is a
linear potentiometer type with a two pin connector
blade with integrated 3-way connector.
Depending on the variation of the external circuit
resistance due to movement of the throttle lever
shaft, a fixed DC input voltage (5V DC) to sensor
provides a variable DC output voltage.
Sensor Standalone Diagnosis :
With ignition key is 'ON' position and supply
voltage at 5V DC, use multi meter to measure the
signal voltage at pin no. 2 and 3.
Signal Volt = 0.68 V DC at idle position.
Signal Volt = 4.25 ± 0.15V DC at wide
open throttle (WOT) position.
Use diagnostic tester to check throttle sensor by
pressing and releasing the accelerator pedal.
1. Connect variable power supply to the
Throttle Actuator DC Motor pins XX and XX.
Give 5V power supply to Throttle Position
Sensor supply pins xx, xx and connect
ground to sensor ground pins xx, xx.
2. Vary the supply voltage from 0 to 5 Volts
and check whether the Throttle plate is
moving in counter clockwise direction.
3. Also measure the voltage at the Throttle
position sensor signal pins xx, xx. These
voltage signals should vary according to the
graph shown in above snapshot.