NAVIGATOR: ELECTRICAL ERRORS
Throttle
- open circuit, shorted to positive / shorted to negative.
Error cause
•
If the circuit is open, shorted to positive: excessive voltage has been detected at PIN 11 of
the control unit connector.
•
If shorted to negative: voltage equal to zero has been detected.
Troubleshooting
•
Circuit is open, shorted to positive: check the injection control unit connector and the sensor
connector: if they are not OK, restore; if they are OK, check the continuity between PIN 11
of the control unit connector and PIN C of the sensor (brown/yellow cable): if there is not
continuity, restore the cable harness; if there is continuity, check continuity of the sensor
between PIN A and PIN C: if there is not continuity, replace the potentiometer; if there is
continuity, measure the resistance. If resistance is over 2 kOhm, it indicates the brown/yellow
cable is shorted to positive; therefore, it is necessary to restore cable harness
•
shorted to negative: disconnect the sensor connector and check ground insulation of the
brown/yellow cable (from throttle sensor connector or control unit connector): if there is
continuity with the ground connection, restore the cable harness; if isolated from ground
connection, the resistance between PIN A and PIN C is below 1.3 kOhm; therefore, it is
necessary to replace the throttle body.
NAVIGATOR: ADJUSTABLE PARAMETERS
Self-adjustable parameters reset:
Lambda probe: operation to be carried out after the throttle body is cleaned, or in the case a new engine,
a new lambda probe or a new injector is fitted, or the correct operation of the injection system or the
valves is restored.
Throttle positioner self-acquisition
:
Allows the control unit to detect the closed throttle position: just press the enter button. The operation
should be carried out when the throttle body of the throttle position sensor or the injection control unit
is replaced
RESET PROCEDURE:
Once the throttle body or the injection control unit is replaced, it is necessary to connect to the diagnosis
instrument selecting FUEL INJECTION and carry out the operation: Throttle positioner self-acquisition
Electrical system
NEVADA 750
ELE SYS - 42
Содержание NEVADA 750
Страница 1: ...SERVICE STATION MANUAL 981106 NEVADA 750...
Страница 4: ......
Страница 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR...
Страница 19: ...INDEX OF TOPICS SPECIAL TOOLS S TOOLS...
Страница 22: ...INDEX OF TOPICS MAINTENANCE MAIN...
Страница 31: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS...
Страница 32: ...Electrical system NEVADA 750 ELE SYS 32...
Страница 33: ...Components arrangement NEVADA 750 Electrical system ELE SYS 33...
Страница 58: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE...
Страница 73: ...INDEX OF TOPICS POWER SUPPLY P SUPP...
Страница 75: ...Diagram Key 1 Control unit position 2 Ignition switch 3 Battery 4 Fuel pump NEVADA 750 Power supply P SUPP 75...
Страница 82: ...INDEX OF TOPICS SUSPENSIONS SUSP...
Страница 98: ...INDEX OF TOPICS CHASSIS CHAS...
Страница 122: ...Unscrew and remove the lambda sen sor Chassis NEVADA 750 CHAS 122...
Страница 123: ...INDEX OF TOPICS PRE DELIVERY PRE DE...