NANO

264 / 1980

258
ENGINE 273 MPFI
Refitment of T-MAP sensor
• Check the O-ring fitment of the T-MAP sensor.
• Refit the screws of the T-MAP sensor by screw
driver.
• Refit the T-MAP sensor connector.
Stand Alone Diagnosis
Refer 3.11.5 Trouble Shooting and Diagnosis.
SystemDiagnosis
• Use TATAdiagnostic tool.
On vehicle Removal, Inspection & Refitment
Procedure
Removal of T-MAP sensor
• Remove the T-MAP sensor connector.
Precaution :
• Pull the connector after pressing the lock.
• Remove the screws of the T-MAP sensor.
• Take out the T-MAP sensor.
Inspection of T-MAP sensor
• Check the resistance of T-MAP sensor.
KNOCK SENSOR :
Working Principle:
Knock sensor is directly mounted on the cylinder
block. When knock occurs due to the uncontrolled
combustion, vibrations are generated on the block.
These vibration forces cause a charge transfer and a
voltage is generated by the sensor element. This is
tapped off by contact discs and passed to the ECU
where it is processed.
System Integration:
Sensor is fitted on to block directly so that the structure
borne vibrations generated by the ‘knocking’ can be
detected effectively. This will enable the ECU to limit
the Ignition timing (advance) for optimum efficiency,
without the knock damaging the engine.