Ambient Air Temperature Sensor

12.2 Ambient Air Temperature Sensor

An optional Caterpillar Ambient Air Temperature Sensor is available. The sensor should be mounted in a location providing the most accurate measurement of ambient (outside) air temperature. Recommended locations are inside the battery box or on the frame rail near the front bumper. The sensor is used on applications that monitor outside air temperature in order to allow an Idle Shutdown Override when the outside air temperature is below a minimum or above a maximum programmed range. The two wire sensor is available from Caterpillar (part number 130-9811), and is identical to the factory installed Coolant, Fuel and Intake Manifold Air Temperature Sensors. The sensor is only used when the Allow Idle Shutdown Override parameter is programmed to Outside Temp Based. Refer to “Allow Idle Shutdown Override” on page 129 for more information. NOTE: If ambient air temperature is broadcast over the SAE J1587 datalink, the engine ECM can be programmed to use this data instead of this sensor. Refer to “Allow Idle Shutdown Override” on page 129 for more information. OEM provided and installed components required: 1) Ambient Air Temperature Sensor and connector wiring harness. Customer Parameter programming required: 1) Idle Shutdown Time programmed in the 3 - 1440 minutes range. 2) Allow Idle Shutdown Override programmed to Outside Temp Based. 3) Minimum Idle Shutdown Outside Temp programmed to a value between -40 and 49°C (-40 and 120°F). 4) Maximum Idle Shutdown Outside Temp programmed to a value between -40 and 49°C (-40 and 120°F).

12.2.1 Ambient Air Temperature Sensor Connections

AMBIENT AIR TEMPERATURE INPUT SENSOR COMMON 1 2 C453-YL L901-GY

26 18 P1 J1 ECM AMBIENT AIR TEMPERATURE INPUT SENSOR COMMON #1

NOTE: INPUT SENSOR COMMON #2 (TERMINAL-3) MAY BE USED IN PLACE OF INPUT SENSOR COMMON #1 (TERMINAL-18).

Wiring Diagram 9 - 130-9811 Ambient Air Temperature Sensor Wiring Diagram