TIAGO TIGOR CNG - SERVICE MANUAL

1.2L REVOTRON Bi FUEL CNG ENGINE 179  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.