Troubleshooting

Test Note:
If defective components are found while troubleshooting, check wiring to components using the current flow diagram.

Defect Possible cause Remedy

- No display on computer fuses S4 and S12 check fuses computer module check computer

- The functions: function selector switch check function selector switch fuel consumption, elapsed time, average fuel consumption and average speed functions can not be set to zero with the reset button.

- A different function can not be chosen.

- no reading on speedometer speedometer and/or check speedometer and no average speed display. speedometer cable and cable

- km/h or mph display remains at zero after pressing reset button while car is moving

- average fuel consumption (1/100 km or mpg)

^ after pressing reset button, display remains at approx. 200 or 15.5 mpg or at 1/100 km or 15.5 1/100 km

^ display varies between approx. 5 and 200 mpg or between approx. 0 and 51 Ltr.

^ display remains constant at short circuit or break in check air flow sensor control about 5 mpg or 51 Ltr. wiring of air flow sensor control
Defect Possible cause Remedy

- average fuel consumption air flow sensor control check air flow sensor control
(1/100 km) (short circuit or break
in wiring)
^ displayed reading decreases while driving or remains at zero (mpg)

^ displayed reading increases while driving or remains at 200

- Range (miles----> (dot) or km----> (dot))

^ displayed reading increases faster than normal or continuously displays a value greater than 2000

- Fuel gauge in instrument cluster sender for fuel gauge check fuel gauge (short circuit or break in wiring)
^ Displays "empty" or "full" regardless of fuel tank content

- Range (km----> (dot) or Mi----> (dot))

^ Display shows tank empty (E) warning regardless of fuel tank content

Boost pressure display (bar) Break in wiring or short circuit Check boost pressure display

^ no boost pressure display between contact 17 of the control of the board computer or electronic ignition control unit repair short circuit according to
and terminal 5 of the 10-point current flow diagram
connector of the computer