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Fiat Ulysse Factory Service Manual (2002-2010)22 · Fault diagnosis
22 · Diagnostics

Engine coolant temperature gauge not working

Make
Fiat
Model
Ulysse Factory Service Manual
Year
2002–2010
Section
Instrument panel › Engine coolant temperature gauge not working
Fault diagnosisEngine coolant temperature gauge not working

ENGINE COOLANT TEMPERATURE GAUGE NOT WORKING

The message for the engine coolant temperature gauge is produced by the CCM Engine Management Node, then converted by the Instrument Panel Node and displayed in the instrument in the centre of the dashboard.

STEPOPERATIONS TO BE CARRIED OUTTEST RESULTS
1BATTERY VOLTAGE CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the battery voltage is correct.Move on to StepBattery voltage not correct.Restore the correct voltage.
2CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Connect the Examiner diagnostic equipment and check, in the Instrument Panel ambient, that there are no errors and that the parameters are present.Move on to Step1. Impossible to connect with the control unit.Move on to Step
2. Errors detectedMove on to Step
3ERRORS CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check for the presence of one or more of the following errors using the Examiner in the Instrument Panel ambient:

  • No communication with the BSI
  • VAN line error
  • Control unit broken
  • Fuel level gauge error
Move on to Step1. No communication with Body Computer error detected and/or VAN CONfor. network error and/or control unit broken.Move on to Step
2. Coolanat temperature error detectedMove on to Step
4ACTIVE DIAGNOSIS CHECKALL OKPROBLEMS ENCOUNTEREDACTION

With the Examiner in the Instrument Panel ambient check that the function in question is correctly activated in Active Diagnosis.

  • Autotest
  • Coolant temperature gauge
Move on to StepThe component in question is not activated. It is not operated by the active diagnosis.Replace the Instrument Panel Node control unit.
6BATTERY VOLTAGE CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the battery voltage is correct.Move on to StepBattery voltage not correct.Restore the correct voltage.
7CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION

Connect the Examiner diagnostic equipment and check, in the Body Computer ambient, that there are no errors and the following parameter is present and varies:

  • Coolant temperature
Move on to Step1. Impossible to connect with the control unit.1. Replace the Body Computer control unit.
2. Presence of errors.Move on to Step
3. No variation in the values of the parameter selectedMove on to Step
8ERRORS CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check for the presence of one or more of the following errors using the Examiner in the Body Computer ambient:

  • VAN CONF error: connection with Instrument Panel
  • VAN CONF command inconsistency:
  • Multif. or Navig. display error
  • CAN line error (connection with other control units)
Move on to Step1. No communication with Instrument Panel error detected and/or VAN CONfor. network error and/or control unit broken.Move on to Step
2. No communication with Engine Management Control Unit error detected and/or CAN error and/or control unit broken.Move on to Step
3. Control unit broken.3. Replace the Body Computer control unit
10BATTERY VOLTAGE CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the battery voltage is correct.Move on to StepBattery voltage not correct.Restore the correct voltage.
11CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Using the Examiner diagnostic equipment, check, in the Engine Management Control Unit Node ambient, that there are no errors and that the parameters are presentMove on to Step1. Impossible to connect with the control unit.Move on to Step
2. Presence of errors.Move on to Step
3. The values do not change with the engine running3. Replace the Engine Management Control Unit
12ERRORS CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check for the presence of one or more of the following errors using the Examiner in the Engine Management Control Unit Node ambient:

  • CAN line error (connection with other control units)
  • CAN line
  • No communication between injection ECU and other control units
  • No communication on CAN
  • Internal control unit error
Move on to Step1. No communication with Body Computer error detected and/or CAN error and/or control unit broken.Move on to Step
2. No communication with CAN error detectedMove on to Step
3. Internal injection control unit error detected3. Replace the Engine Management control unit.
14CHECK ON CORRECT OPERATIONALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer present

Parts & tools for this job For 2002 Fiat Ulysse

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