Motec LTC, User Manual

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4 Introduction
Installation
LTC Installation
The LTC can be mounted to a flat surface using the two mounting holes.
The LTC should be mounted as far as possible from the exhaust to avoid
excessive heat.
Note: LTC maximum ambient temperature is 100
°
C.
Use Connector A to connect the single LTC to the Lambda sensor. Use
connectors A and B to connect the LTCD to two Lambda sensors. Use the
Power/CAN Connector to power the LTC and connect to the CAN bus.
See Appendices for more details.
Lambda Sensor Installation
Warning: The Bosch LSU 4.9 Lambda sensors are fitted from the factory with
a calibrated trimming resistor embedded in the sensor connector. If the factory
sensor connector is cut off and replaced with another type, the LTC will not
operate correctly.
Note: Unlike the Bosch LSU 4.9 the NTK sensors standard connector can be
removed and replaced by a non-standard connector without affecting the
performance of the sensor or the LTC-NTK. However, the initial factory
calibration method will not work as the calibration resistor is built into the
original connector. In this case Free Air calibration is required. It is
recommended that no wiring modification is made to the NTK sensor or LTC-
NTK unless completely necessary.
The Lambda sensor should be fitted to the exhaust system with the sensor tip
protruding into the exhaust gas flow. The following considerations should be
taken into account when fitting the sensor:
•
Place the sensor on an angle between 10 and 90 degrees to the vertical
with the tip of the sensor pointing down to prevent condensation build up
between the sensor case and the sensor ceramic.
•
Do not place the sensor in a vertical position; excess heat soak will
prevent proper operation.
•
Place the sensor at least 1 metre from the exhaust ports to avoid
excessive heat (recommended).
•
Place the sensor at least 1 metre from the open end of the exhaust system
to avoid incorrect readings due to outside oxygen (recommended)