Ford Transit 2002 Owner's Manual page 900

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The fuel temperature sensor is installed into the fuel injector to fuel tank fuel return line.
The fuel temperature sensor monitors the temperature of the fuel returning to the fuel tank
from the fuel injectors and sends a signal to the PCM.
Inspection and Verification
WARNINGS:
Do not smoke or carry lighted tobacco of any type when working on or near any fuel
related components. Highly flammable mixtures are always present and may ignite.
Failure to follow these instructions may result in personal injury.
This procedure involves fuel handling. Be prepared for fuel spillage at all times.
Failure to follow this instruction may result in personal injury.
CAUTION: Diesel fuel injection equipment is manufactured to very precise tolerances
and fine clearances. It is therefore essential that absolute cleanliness is observed when
working with these components. Always fit blanking plugs to any open orifices or lines.
NOTE: As well as carrying out its normal function the glow plug indicator also acts as an
engine check lamp which will flash continuously when a hard diagnostic trouble code
(DTC) is detected by the powertrain control module (PCM). Soft DTCs are also stored by
the PCM but will only be known if the system is checked for DTCs using the WDS.
NOTE: If a DTC is detected, all DTCs must be cleared after the concern is rectified. Failure
to clear all DTCs may cause driveability concerns.
NOTE: If the fuel level in the fuel tank drops below approximately four liters, rough
running will occur. This is to signal to the driver that the vehicle requires refuelling in
order to prevent the fuel system from running dry.
1. 1. Verify the customer concern.
2. 2. Visually inspect for obvious signs of mechanical or electrical damage.
Description
Fuel injector fuel return line
Fuel temperature sensor
Fuel pump fuel return line
Fuel tank fuel return line union
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