i05946649
Switch
Circuits
-
Test
(Throttle
Switch)
Table 103
Diagnostic Trouble Codes for the Throttle Switch Circuit
J1939
Code
Description
Notes
2880-2
Engine Operator Primary Intermediate Speed Select : Erratic, In-
termittent, or Incorrect
The Electronic Control Module (ECM) detects the following
conditions:
The signal voltage from the throttle switch is between 0.35 V and
4.8 V.
The signal voltage from the throttle switch is not valid for any of
the available modes for at least 0.5 seconds.
The battery voltage is at least 10 V.
The warning lamp will come on.
2880-3
Engine Operator Primary Intermediate Speed Select : Voltage
Above Normal
The ECM detects the following conditions:
The signal voltage from the throttle switch is above 4.8 VDC for
at least 0.5 seconds.
The battery voltage is at least 10 VDC.
The warning lamp will come on.
2880-4
Engine Operator Primary Intermediate Speed Select : Voltage
Below Normal
The ECM detects the following conditions:
The signal voltage from the throttle switch is less than 0.35 VDC
for at least 0.5 seconds.
The battery voltage is at least 10 VDC.
The warning lamp will come on.
The throttle switch uses resistors to modify the
voltage signal from the ECM. The resistance of the
switch changes dependent on which position the
switch is in. The ECM uses the signal voltage to
determine which mode has been selected.
Illustration 69
g03117957
View of the signal voltage range for the throttle switch
218
UENR0612
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