2.4.2.2. Exhaust gas temperatureΒΆ

Description

There are three sensors in an exhaust line. The first is before the DOC, the second is before the SCR catalyst and the last one is after the catalyst. All the sensors are similar.

ECU connection

The pin numbers at the ECU:

DOC upsteam:

EDC17CV41+      2.38 Analog input
EDC17CV41+      2.42 Ground

DOC Downstream:

EDC17CV41+      1.16 Analog input
EDC17CV41+      1.91 5V supply

SCR Upstream:

EDC17CV41+      1.31 Analog input
EDC17CV41+      1.10 Ground

SCR Downstream:

EDC17CV41+      1.09 Analog input
EDC17CV41+      1.10 Ground

The pin numbers at the connector:

Pin 1:          Ground
Pin 2:          Analog input

DOC Downstream:

Pin 1:          5Vdc Supply voltage
Pin 2:          Ground

The exhaust gas temperature sensor is shown in figure ECU connection EDC17CV41+, Exhaust gas temperature sensor. NOTE: Different pin order in DOC downstream temperature sensor

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ECU connection EDC17CV41+, Exhaust gas temperature sensor

Characteristics

The exhaust gas temperature sensor characteristics are shown in figure Characteristics, Exhaust gas temperature sensor.
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Characteristics, Exhaust gas temperature sensor

NOTE: DOC downstream sensor has different characteristics due to different electrical connection Characteristics, DOC downstream temperature sensor.
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Characteristics, DOC downstream temperature sensor