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dummyheaddummyhead
FUEL SYSTEM
SWITCH INSPECTION
Disconnect the 1P connector [1] from the EOP
switch (Low pressure side) [2].
Check for continuity between the EOP switch (low
pressure side) terminal and engine ground.
• If there is continuity, the switch wire harness is OK.
• If there is no continuity, replace the EOP switch (low
pressure side).
EBT/EMT SENSOR INSPECTION
Remove the following:
– EBT sensor (page 5-105)
– EMT sensor (page 5-99)
Heat the coolant with an electric heating element.
Suspend the sensor [1] in heated coolant and check the
continuity through the sensor as the coolant heats up.
• Wear insulated gloves and adequate eye protection.
Keep flammable materials away from the burner.
• Soak the sensor in coolant up to its threads with at
least 40 mm (1.57 in) from the bottom of the pan to
the bottom of the switch.
• Keep temperature constant for 3 minutes before
testing. A sudden change of temperature will result
in incorrect readings. Do not let the thermometer [2]
or sensor touch the pan.
Replace the sensor if it is out of specifications.
Install the following:
– EBT sensor (page 5-105)
– EMT sensor (page 5-99)
Temperature 40 °C (104 °F) 100 °C (212 °F)
Resistance 1.0 – 1.3 kΩ 0.1 – 0.2 kΩ
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