ECU CK./Range Reading Calib. and Fuel Use Reading Correcting
Function Selector Switch:
Computer, checking
Work sequence
- switch ignition ON
- select all computer functions in sequence by pressing left and right function selector switches
^ right switch - selects from left to right
^ left switch - selects from right to left
If it is not possible to select all functions, - check function selector switch
- repeat test
It it still is not possible to select all functions, or if computer display is dim:
- remove instrument cluster. (Do not detach connectors)
- check printed circuit for day/night illumination as follows:
Printed Circuit:
- connect voltmeter between connections tor day illumination (A)
- switch ignition ON
^ specified value: approx. 10.0V
- switch ignition OFF
- connect voltmeter between connections for night illumination (B)
- turn parking lights on and turn instrument panel illumination control to the left as far as possible
^ specified value: approx. 12.0V
If one of the specified readings is not obtained, - repair break in wiring using current flow diagram
If the specified readings are attained, - replace day/night illumination bulbs.
Connector A - Yellow Band:
- check voltage supply to Board Computer as follows:
Connector B - White Band:
- connect voltmeter between contact 7 of connector A (yellow band) and contact 1 of connector B (white band) on instrument cluster
^ specified value: approx. 12.0V
- connect voltmeter between contacts 7 and 12 of connector A
- switch ignition ON
^ specified value: approx. 12.0V
- switch ignition OFF
If specified values are NOT obtained, - repair break in wiring using current flow diagram
Contacts on Printed Circuit (1-8):
- connect voltmeter between contact 3 and 7 of printed circuit
^ specified value: 12.0V
- connect voltmeter between contact 3 and 2 of printed circuit
- switch ignition ON
^ specified value: approx. 12.0V
If one of specified values is not obtained, - check printed circuit for damage and replace if necessary
Contacts on Printed Circuit (1-8):
- connect voltmeter between contacts 3 and 5 of printed circuit
^ specified value: 9.75-10.25V
If specified value is NOT obtained, - check printed circuit for damage
- replace voltage stabilizer or printed circuit if necessary
Contacts on Printed Circuit (1-8):
Connector B - White Band:
- connect voltmeter between contact 9 of connector B (white band) and contact 5 of printed circuit
^ specified value: 1.5-6.0V (depending on fuel tank content)
If specified value is not obtained, - repair wiring using current flow diagram
If specified values are obtained but there is no display, - check printed circuit for damage or replace computer
Reset Button:
Computer range reading, calibrating
Note
Calibrate the range reading only after performing the following repairs:
^ replacing sender for fuel gauge
^ replacing computer (when range reading defective)
Note
Calibrate range reading with full fuel tank.
The Board Computer calculates an average
consumption of 10 1/100 km regardless of what is
shown on display unit (km or mi)
- switch ignition OFF
- press reset button and hold
- switch ignition ON
- release reset button
^ range display: 700-800 km
Range Calibrating Screw:
Note
Range calibrating screw (arrow) can be turned only 1/2 turn between stops
- remove protective cap
- turn screw (arrow) to calibrate range reading
^ approx. 750
If specified value is NOT obtained, - check fuel gauge, - repeat range reading calibration
If specified value is still not obtained, - replace Board Computer
Correction Switches:
Fuel consumption reading, correcting (0 1/100 km or 0 mpg)
Note
If computer calculating fuel consumption deviates more than 10% from the actual fuel consumption, the reading can be corrected by total +/- 16% with an adjustment on the instrument cluster
Work sequence
- remove digital clock from the instrument panel
- locate correction switches (arrow)
Correction Switch:
- adjust correction switch (arrow) to correspond to needed correction