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Fiat 500 Factory Service Manual (2007-2024)22 · Fault diagnosis
22 · Diagnostics

Display does not show range on trip module

Make
Fiat
Model
500 Factory Service Manual
Year
2007–2024
Section
Instrument panel › Display does not show range on trip module
Fault diagnosisDisplay does not show range on trip module

DISPLAY DOES NOT SHOW RANGE ON TRIP MODULE

1.2 8v, 1.3 Multijet, 1.4 16v

With the key ON, the fuel consumption gauge on the display (one of the displays on the TRIP COMPUTER module) is not operational.

N.B: The display shows the range processed by the instrument panel node on the basis of information received from the body computer node (distance and fuel level as a percentage) and from the engine management node (consumption) made available to the instrument panel node via the B-CAN and C-CAN respectively. This data is then adjusted proportionally according to the tank capacity programmed at the EOL.

In the absence of speed information (from the Brake Node) or instantaneous fuel consumption data (from the Engine Control Node), the fuel consumption data will be replaced by the reading "----"

Test results
0PRELIMINARY CHECKSAll OKProblems encounteredOperation

Interview the customer to check that the TRIP function has not been recently reset

Check that the fuel gauge shows a sufficient quantity of fuel

Move on to Step 1

1. One of the TRIP COMPUTER functions has been reset

2. Insufficient amount of fuel

1. The display reading will be "----" until sufficient distance has been covered to allow fuel consumption to be evaluated: if the value is not displayed after a few kilometres, continue to Step 1

2.Refill with a sufficient amount of fuel

1CAN CHECKAll OKProblems encounteredOperation

Connect an EXAMINER and check the following on CAN NETWORK INFORMATION:

  • No control units inactive
  • No faulty control units
  • No control units with faulty CAN line
Move on to Step 2

1. Fault on CAN network

2. Communication with the Body Computer impossible

1. Continue following the instructions given by the diagnostic equipment

2. Move on to Step 8

2CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

Keeping the diagnostic instrument connected, check the following on the BRAKE NODE:

  • No system/component errors
  • No CAN faults
Move on to Step 3

1. System/components faulty

2. Fault on C-CAN network

1. Continue following the instructions given by the diagnostic equipment

2. Move on to Step 9

3CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

Keeping the diagnostic instrument connected, check the following on the ENGINE CONTROL NODE:

  • No system/component errors
  • No CAN faults
Move on to Step 4

1. System/components faulty

2. Fault on C-CAN network

1. Continue following the instructions given by the diagnostic equipment

2. Move on to Step 9

4CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation

Keeping the diagnostic instrument connected, check the following on the INSTRUMENT PANEL NODE:

  • No system/component errors
  • No CAN faults
Move on to Step 5

1. System/components faulty

2. Fault on C-CAN network

1. Continue following the instructions given by the diagnostic equipment

2. Move on to Step 9

5ACTIVE DIAGNOSIS CHECKAll OKProblems encounteredOperation
With the Examiner in Instrument Panel Node mode check that all segments of the LCD module are correctly activated in Active Diagnosis.Move on to Step 7

1. One or more segments do not activate

2. Communication with the instrument panel impossible

1. Replace the Instrument Panel

Op. 5560B10 CONTROL PANEL - R+R

2. Move on to Step 6

6ELECTRICAL CONNECTIONS CHECKAll OKProblems encounteredOperation
Check the electrical connections between the Body Computer and the Instrument Panel. In particular, check that each individual pin is properly connected.Move on to Step 5Electrical connections not operationalRenew the damaged electrical connections.
7CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Using an Examiner check, in Body Computer Node mode, that there are no errors.Move on to Step 9

1. Impossible to connect to the Body Computer control unit

2. Presence of errors

1. Move on to Step 8

2. Continue by following the instructions on the diagnostic instrument

8ELECTRICAL POWER SUPPLY CHECKAll OKProblems encounteredOperation
Check the electricity supply to the Body Computer Node is correct.Move on to Step 9Fault in positive electrical supply and/or earth.Replace defective component (in the case of a fuse, find out what caused it to blow).
9CHECK USING DIAGNOSTIC EQUIPMENTAll OKProblems encounteredOperation
Use an Examiner to check the possibility of connection to the Body Computer NodeEnd of diagnosisImpossible to connect to the Body Computer control unit.

Replace Body Computer

Op. 5505A32 BODY COMPUTER - R.R

Parts & tools for this job For 2007 Fiat 500

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