Tmaf Sensor - jcb JS300 Service Manual

Location
The Temperature Mass Air Flow (TMAF) sensor 1 is
located in the induction hose between the air filter and
turbocharger.
1
2
Overview
There are two sensor areas on the TMAF sensor, area 3
senses the induction air flow and area 4 senses the
induction air temperature. The engine ECU uses the TMAF
sensor values as part of the engine fuel injection control
strategy. For more information about the TMAF sensor
refer to the applicable engine documentation.
The TMAF sensor is connected to the engine ECU via
harness connector C149 and interconnector IC17. The
sensor operates on a 12V supply which is output via the
engine ECU.
Removal and Replacement Guide
Removal
Note: The temperature sensor area 3 in the TMAF unit 1
may be hot. Do not touch this area.
Note: Do not touch the temperature sensor area 3, air flow
sensor area 4 or connector pins.
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TMAF Sensor

2
Fig 22.
9813/5100-1
Section C - Electrics
Engine and Power Control
Note: Do not use a TMAF sensor which has been dropped
or damaged. Replace with a new one.
1 Park the machine and make it safe. Obey the care
and safety procedures.
2 Disconnect the battery.
3 Disconnect the electrical harness connector at the
TMAF sensor 1.
4 Remove the screws 2.
5 Remove the TMAF sensor 1 from the induction hose.
Replacement
Replacement of the TMAF sensor is the reverse of the
removal procedure. Torque tighten the screws to 1.5 Nm.
TMAF Sensor
1
3
4
C146690
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