Switch Circuits - Test (Throttle Switch) - Perkins 854F-E34T Troubleshooting Manual

218
Circuit Tests
Switch Circuits - Test
(Throttle Switch)
Table 103
J1939
Code
2880-2 Engine Operator Primary Intermediate Speed Select : Erratic, In-
termittent, or Incorrect
2880-3 Engine Operator Primary Intermediate Speed Select : Voltage
Above Normal
2880-4 Engine Operator Primary Intermediate Speed Select : Voltage
Below Normal
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
View of the signal voltage range for the throttle switch
This document has been printed from SPI2. NOT FOR RESALE
i05946649
Diagnostic Trouble Codes for the Throttle Switch Circuit
Description
Notes
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.
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.
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.
UENR0612
g03117957