Troubleshooting

i06229833
Mode Selection - Test
Table 79
Diagnostic Trouble Codes for the Mode Selection Circuit
J1939
Code
Description
Notes
2880-2 Engine Operator Primary Intermediate Speed Select : Erratic,
Intermittent, or Incorrect
The Electronic Control Module (ECM) detects the following
conditions:
The signal voltage from the mode selection switch is between
0.35 V and 4.8 V.
The signal voltage from the mode selection 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 mode selection 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 mode selection 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 mode selection 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 35 g03117957
View of the signal voltage range for the mode selection switch
UENR0612-07 159
Circuit Tests
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