Great Wall GW491QE, Service Manual

Page: 35 / 222

Electrical data of sensor
Measurement Value Unit
At room temperature,
and under a power cut to heating element
30 M
Ω
When exhausted gas is at temperature 350
℃
10 M
Ω
The resistance between
the heating element of
new sensor and the
connector
When exhausted gas is at temperature 850
℃
100 K
Ω
Rated voltage 12 V
Continue working voltage 12-14 V
Uninterrupted working voltage
Working voltage
sustaining 1% whole life at most
exhausted gas temperature
≤850℃
15 V
Working voltage
sustaining for 75 seconds at most
exhausted gas temperature
≤350℃
24 V
Power of the connector
Testing voltage 13 V
Heating power under a heat balance at working voltage 13V
When the exhausted gas is at
a temperature of
350℃
, and a flow rate of approx. 0.7m/s
12 W
Heating current under a heat balance at working voltage 13V
When the exhausted gas is at
a temperature of
350℃
, and a flow rate of approx. 0.7m/s
5 A
Fuse in heating circuit 8 A
Service life
The service life of oxygen sensor depends on the lead content in petrol, refer to the list below:
Lead content in petrol Life duration km
≤
0.6 20000
≤
0.4 30000
≤
0.15 60000
≤
0.005(lead-free petrol) 160000
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