Table 105
Diagnostic Trouble Codes for the Oil Pressure Switch
J1939 Code
Description
Notes
100-2
Engine Oil Pressure : Erratic, Intermittent, or Incorrect
When the keyswitch is in the ON position (engine not run-
ning), the oil pressure switch circuit should be closed.
This diagnostic code will be active when the Electronic Con-
trol Module (ECM) detects the following conditions:
The engine is not running.
The circuit for the oil pressure switch is open for at least 3
seconds.
The keyswitch has been switched on for at least 6 seconds.
The battery voltage is at least 10 VDC.
The engine is equipped with an oil pressure switch.
While the engine is running and oil pressure is
detected, the switch will be open. When no oil
pressure is detected, the switch will be closed.
Table 106
Oil Pressure Switch States and Diagnostics Summary
Engine Condition
Oil Pressure Switch
State
Active Diagnostic
Code
Not running
Closed
Normal condition (no
oil pressure
detected)
Running
Open
Normal condition (oil
pressure detected)
Not running
Open
100-2
Running
Closed
100-17
Note:
If a 100-17 diagnostic code is active, refer to
Troubleshooting, “Oil Pressure Is Low” before
returning to this procedure.
Illustration 72
g03636596
Schematic diagram for the oil pressure switch
Not all connectors are shown. Refer to the appropriate Electrical Schematic.
222
UENR0612
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