Symptom:
*CHECKING THE FUEL TEMPERATURE SENSOR CALIBRATION
POSSIBLE CAUSES
FUEL TEMPERATURE SENSOR - COLD
FUEL TEMPERATURE SENSOR - HOT
TEST
ACTION
APPLICABILITY
1
Disconnect the Fuel Heater harness connector.
With the DRB, monitor the engine coolant temperature and fuel temperature.
Start and idle the engine until engine temperature reaches 70°C (160°F).
NOTE: If the engine temperature is above 70°C (160°F), allow the engine to
cool down to 70°C (160°F).
Is the fuel temperature between 20°C (70°F) and 50°C (120°F)?
All
Yes
→
Go To
2
No
→
Replace the Fuel Injection Pump Assembly in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
2
Disconnect the Fuel Heater harness connector.
With the DRB, monitor the engine coolant temperature and fuel temperature.
Start and idle the engine until engine temperature reaches 70°C (160°F).
NOTE: If the engine temperature is above 70°C (160°F), allow the engine to
cool down to 70°C (160°F).
Start the engine and allow engine to reach operating temperature of 90°C (195°F).
Does the Fuel Temperature increase smoothly to 40-60°C (100-140°F)?
All
Yes
→
Test Complete.
No
→
Replace the Fuel Injection Pump Assembly in accordance with the
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
188
DRIVEABILITY - DIESEL