Installation Manual

Electrical & Electronic Application And Installation Manual
Production Release Version 1.0
Page 120
9.6 DOC, DPF & SCR Inlet Temperature Sensors (1204F)
9.6.1 DOC, DPF & SCR Inlet Temperature Sensor Operation
The 1204F DOC, DPF & SCR Inlet temperature sensors are required for
accurate control / monitoring of the engine aftertreatment system. The
number of temperature sensors required for each individual engine range is
dependent upon the chosen aftreatreatment recipe. For example if a DOC +
SCR system is chosen then no DPF temperature sensor is required. In all
cases the temperature sensors are supplied loose with each engine.
Threaded mounting ports are also provided in each aftertreatment location for
simple customer connection.
Figure 9.27 DOC, DPF & SCR Temperature Sensor
9.6.2 DOC, DPF & SCR Inlet Temperature Sensor Configuration
No configuration of the DOC inlet temperature is required.
9.6.3 DOC, DPF & SCR Inlet Temperature Sensor Installation
Each Inlet Temperature Sensor is supplied as a loose part with the engine
and aftertreatment system. Care must be taken when installing the DOC,
DPF and SCR temperature sensors to ensure that the associated electrical
wiring is routed back to the correct Tenneco XNOx pin allocation.
The routing of the electrical cable from the rear of the senor must meet the
requirements shown in figure 9.28
Figure 9.28 Temperature Sensor Cable Minimum Bend Radius
In addition fixation points for the sensor cable should meet the following
criteria;
• 1
st
fixation point between 150 and 250mm behind the fixation nut.
• Between 150 and 250mm before the electrical connector.