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Revotron 1.2T
146
ii. Lambda Sensor :
Component Details :
The oxygen sensor operates on the
principle of galvanic oxygen concentration cell
(Nernst cell) with solid electrolyte (Nernst's
principle). The ceramic sensing element is a
conductor of oxygen ions from a temperature
of 350 C. A heater is integrated on the
sensing element. It is placed into the exhaust
manifold. The sensing element compares the
residual oxygen content in the exhaust gas
with the oxygen content in the reference
atmosphere (air surrounding the sensing
element). This gives an output voltage
between 100mV (lean exhaust gas) to 800mV
(rich exhaust gas), depending on whether the
exhaust gas is lean or rich.
Component Location :
The lambda sensor is mounted on the closed
couple catcon.
Preliminary Checks :
1. Loose/ Damaged Connections between
Sensor and EMS ECU.
2. Check for back out of pins at both Sensor
connector and ECU connector.
3. Check for damage of pins at both sensor
connector and ECU connector.
4. Check the continuity from sensor
connector pins to the ECU pins.
5. Check
for
Sensor
poisoning
/
contamination.
Circuit Schematic Diagram :
Connector Information :
Con
ID
Wire
ID
Color Size Material Option
1
121P
R/Y
1.50
FLRYB
(AD)
2
457
V/P
0.75
FLRYB
(AD)
3
456
SB/Y
0.50
FLRYB
(AD)
4
455
P/R
0.50
FLRYB
(AD)