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Revotron 1.2T
147
Connector View :
Component Specification :
The lambda sensor is mounted on the
closed couple catcon. The lambda sensor has
a four pin connector with a special ceramic
body and gas permeable platinum electrodes
on the surface. When the ceramic body is
exposed to temperature 350
0
C, oxygen in the
air diffuses into ceramic body. Depending on
the porosity electrodes which are exposed to
gas having varied level of oxygen. The
lambda sensor provides air/fuel ratio signal in
mili volts to ECU as a function of varying
air/fuel ratio.
At 350
0
C,
Lambda = 0.97 - 800 mV ± 55 mV(Rich
mixture)
Lambda = 1.1 - 50 mV ± 30 mV (Lean
mixture)
Sensor Stand alone Diagnosis :
Connector details
Terminal 1 :- 12 V Supply
Terminal 2 :- ECU pin number M1E2 (Heater)
Terminal 3 :- ECU pin number M2B3 (-ve)
Terminal 4 :- ECU pin number M2A3 (+ve)
Use TATA diagnosis tool to check for :
Signal voltage - > than 0.5V or < than 0.4V
Switching frequency - > than 0.2 Hz
Use multimeter to check the heater function
by measuring the heater resistance.
Heater resistance at room temperature – 90
ohms
Supply voltage - 5V DC
Check the signal voltage (Between pin
number 2 and 3)
Signal Voltage - 0.68 ± 0.25V DC- at idle
position
Signal Voltage - 04.25 ± 0.45V DC – at WOT
position