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Electrical system
NAVIGATOR: ELECTRICAL ERRORS
Throttle - open circuit, shorted to positive / shorted to negative.
Error cause
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Troubleshooting
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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
ELE SYS - 42
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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.
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.
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NEVADA 750
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