NANO

260 ENGINE 273 MPFI • Remove the accelerator cable connection to throttle body. • Remove the throttle body assembly by removing the clamp using screw driver. Inspection • Check for external damage of the body. • Check for free movement of the throttle lever. PRECAUTION Press the lock and pull out the coupler. Do not pull the wire. Stand Alone Diagnosis Refer 3.11.5 Trouble Shooting and Diagnosis. SystemDiagnosis • Use Tata Diagnostic Tool. • Check for throttle sensor voltage by pressing the accelerator pedal in and out. • Measure resistance between pin no. 2 & 3 Permissible value = 2000 +/- 400 Ohm constant throughout the movement of TPS. • Also check nominal O/P voltage ratio from stop to stop. It should be 0.05 less than or equal to Ua/Uv less than equal to 0.95. Where, Ua = Output voltage Uv = Supply voltage On vehicle Removal, Inspection & Refitment Procedure : Throttle Body assembly consists of - 1. Bare throttle body (with spring) 2. Throttle position sensor (TPS) and 3. IntakeAir Control valve (IACV) / ISC Valve Removal Procedure for TPS • Remove battery negative terminal . PRECAUTION Ensure that the removed terminal is away from the battery negative post/body. • Remove the Throttle body sensor connector.