Troubleshooting

(Table 104, contd)
Troubleshooting Test Steps
Values Results
9. Check the Crankshaft Timing Ring and the Camshaft
Position Wheel
A. Inspect the crankshaft timing ring. Refer to Disassembly
and Assembly, “Crankshaft Timing Ring - Remove and
Install”.
B. Inspect the camshaft position wheel. Refer to Disassembly
and Assembly, “Camshaft Gear - Remove and Install”.
Defects Result: Found fault with the crankshaft timing ring or the cam-
shaft position wheel
If necessary, replace the camshaft position wheel. Refer to
Disassembly and Assembly, “Camshaft Gear - Remove and
Install”.
If necessary, replace the crankshaft timing ring. Refer to Disas-
sembly and Assembly, “Crankshaft Timing Ring - Remove and
Install”.
Use the electronic service tool in order to clear all logged diag-
nostic codes and then verify that the repair has eliminated the
fault.
Result: No faults found.
Contact the Dealer Solution Network (DSN).
10. Check if a Replacement ECM Eliminates the Fault
A. Contact the DSN.
B. If the DSN recommends the use of a replacement ECM, in-
stall a replacement ECM. Refer to Troubleshooting, “Replac-
ing the ECM”.
C. Use the electronic service tool to recheck the system for
active diagnostic codes.
Diagnostic
codes
Result: There are no active diagnostic codes with the replace-
ment ECM.
Reconnect the suspect ECM. If the fault returns with the sus-
pect ECM, replace the ECM.
Use the electronic service tool in order to clear all logged diag-
nostic codes and then verify that the repair eliminates the fault.
Result: The diagnostic code is still present with the replace-
ment ECM.
Contact the DSN.
i06019874
Switch Circuits - Test
(Engine Oil Pressure Switch)
Use this procedure to diagnose electronic faults in
the oil pressure switch circuit.
This procedure covers the following diagnostic code:
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.
UENR0612-07 231
Circuit Tests
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