312000631 - K043 DISPLAY DOES NOT SHOW AVERAGE CONSUMPTION ON TRIP MODULE

With the key to MAR, the fuel consumption gauge on the display (one of the displays on the TRIP COMPUTER module) is not operational. N.B: The display provides two types of fuel consumption reading, instantaneous or average. The fuel consumption readings are processed by the instrument panel node on the basis of information received from the body computer node (mileage) and the engine control node (litres of fuel consumed), made available to the instrument panel node via the B-CAN and C-CAN networks respectively. 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 ENCOUNTEREDACTION
Interview the customer to check that the TRIP function has not been recently resetMove on to Step 1One of the Trip Computer functions has been resetThe 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
1CAN CHECKSALL OKPROBLEMS ENCOUNTEREDACTION
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 21. Fault on CAN network1. Continue following the instructions given by the diagnostic equipment
2. Communication with the Body Computer impossible2. Move on to Step 9
2CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Keeping the diagnostic instrument connected, check the following on the BRAKE NODE:

  • No system/component errors

  • No CAN faults
Move on to Step 31. System/components faulty1. Continue following the instructions given by the diagnostic equipment
2. Fault on C-CAN network2. Move on to Step 11
3CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Keeping the diagnostic equipment connected, check the following on the ENGINE CONTROL NODE:

  • No system/component errors

  • No CAN faults
Move on to Step 41. System/components faulty1. Continue following the instructions given by the diagnostic equipment
2. Fault on C-CAN network2. Move on to Step 11
4CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Keeping the diagnostic instrument connected, check the following on the INSTRUMENT PANEL NODE:

  • No system/component errors

  • No CAN faults
Move on to Step 51. System/components faulty1. Continue following the instructions given by the diagnostic equipment
2. Fault on C-CAN network2. Move on to Step 11
5ACTIVE DIAGNOSIS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
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 81. One or more segments do not activate1. Replace the Instrument Panel    Op. 5560B10 CONTROL PANEL - R+R
2. Communication with the instrument panel impossible2. Move on to Step 6
6ELECTRICAL POWER SUPPLY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the electricity supply to the Instrument Panel Node is correct.Move on to Step 7Fault in positive electrical supply and/or earthReplace defective component (in the case of a fuse, find out what caused it to blow)
7ELECTRICAL CONNECTIONS CHECKALL OKPROBLEMS ENCOUNTEREDACTION
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 8Electrical connections not operationalRenew the damaged electrical connections
8CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Using an Examiner check, in Body Computer Node mode, that there are no errors.Move on to Step 121. Impossible to connect to the Body Computer control unit1. Move on to Step 9
2. Presence of errors2. Continue by following the instructions on the diagnostic instrument
9ELECTRICAL POWER SUPPLY CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the electricity supply to the Body Computer Node is correct.Move on to Step 10Fault in positive electrical supply and/or earth.Replace defective component (in the case of a fuse, find out what caused it to blow).
10CHECK USING DIAGNOSTIC EQUIPMENTALL OKPROBLEMS ENCOUNTEREDACTION
Use an Examiner to check the possibility of connection to the Body Computer NodeMove on to Step 11Impossible to connect to the Body Computer control unit.Replace Body ComputerOp. 5505A35
11CORRECT OPERATION CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check that the fault is no longer presentEnd of diagnosis