Diagnostic steps of diesel temperature

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Turbo Common rail injection
 
STEP
CHECKS TO BE CARRIED OUT
SOLUTION IF CHECK NOT OK
1
At operating temperature, with the engine idling and all the electrical supplies disabled, a value of between 10 and 80°C should be read.
The test may be considered concluded.
Proceed to Step 2
2
Turn the ignition key to the STOP position.
Disconnect the wiring harness connector from connector A of the engine management control unit.
Turn the key to the IGNITION-ON position.
Measure the voltage between Pin 13 (wiring side) of the control unit
See: ENGINE MANAGEMENT CONTROL UNIT (Container)
and Ground, ensuring that it is less than 0.3 V.
Proceed to Step 4
Proceed to Step 3
3
Turn the ignition key to the STOP position.
Measure the resistance between Pin 13 (wiring side) of the control unit
See: ENGINE MANAGEMENT CONTROL UNIT (Container)
and Ground, ensuring that it is greater than 500 kOhm
Proceed to Step 4
4
Disconnect the wiring harness connector from the fuel temperature sensor.
Measure the resistance between Pin 13 (wiring side) of the control unit
See: ENGINE MANAGEMENT CONTROL UNIT (Container)
and Pin 1 (wiring side) of the sensor
See: FUEL TEMPERATURE AND WATER IN FUEL FILTER SENSOR (Container)
ensuring that it is less than 5 Ohm
Restore, or if necessary replace, the electric wiring between the engine management control unit and the resistor
See: DIESEL ENGINES ELECTRONIC MANAGEMENT (Container)
5
Measure the resistance between Pin 61 (wiring side) of the control unit
See: ENGINE MANAGEMENT CONTROL UNIT (Container)
and Pin 2 (wiring side) of the sensor
See: FUEL TEMPERATURE AND WATER IN FUEL FILTER SENSOR (Container)
ensuring that it is less than 5 Ohm
Restore, or if necessary replace, the electric wiring between the engine management control unit and the sensor
See: DIESEL ENGINES ELECTRONIC MANAGEMENT (Container)
6
Replace the sensor
See: FUEL FILTER ASSEMBLY - R.R. OR REPLACE (Info)
and ensure that the fault has been resolved
Restore the original resistor and replace the engine management control unit
See: DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R (Info)
 

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