E0161-03-Engine Oil Pressure Sens Shorted To High Source (B.60.A.95.91 - G.30.B.54) - New Holland CX720 Repair Manual

E0161-03-Engine Oil Pressure sens Shorted To High Source
(B.60.A.95.91 - G.30.B.54)
CX720 Series 1238 and above, CX740 Series 1238 and above, CX760 Series 1238 and above, CX780 Series 1238 and above, CX820 Series 1238 and
above, CX840 Series 1238 and above, CX860 Series 1238 and above, CX880 Series 1238 and above
E0161-03 - Engine Oil Pressure sens Shorted To High Source
NOTE: This troubleshooting chart is for CX combines Series 1238 and above.
Cause:
The engine oil pressure sensor (B-30) circuit is shorted to 12 volts.
Possible failure modes:
1. Switch supply wiring shorted to 12 volts.
2. Controller internal failure (internal regulator failure).
Solution:
1. Enter the InfoView Monitor - "Diagnose info" screen.
Select "Engine" sub menu.
Select "Engine oil pressure sens" and check voltage range.
The proper voltage range for the engine oil pressure sensor (key On, engine OFF) is — 0.5 - 0.8 volts.
The proper voltage range for the engine oil pressure sensor (key On, engine Running) is — 0.8 - 4.9 volts.
A. If the voltage reading is high out of range (>5.2 volts), continue with Step 2.
B. If voltage is normal, the shorted wire may not be energized at this time. Continue with step 8.
NOTE: Visually inspect the wiring harness and connectors. Verify that the connector was fully installed. Inspect
the terminals and wires at the connector for pushed back or corroded terminals or damaged wires. Flex the
harnesses involved to reveal intermittent breaks or shorts in the wiring concerned.
2. The voltage reading on the Infoview monitor is high. Disconnect the engine oil pressure sensor connector X201.
Use a multimeter to check for voltage on connector X201 pin B. There should be 5 volts present.
A. If high (>5.5 volts) voltage is found, the regulated voltage supply is incorrect. The error "E0165-03 CCM2
5V Ref Voltage 3 Shorted to High Source" should be listed in the "Active Errors" screen in the Infoview
monitor. Correct that error, and then check to determine if this error has been resolved.
B. If correct voltage is found, continue with step 3.
3. The voltage reading on the InfoView monitor is high. Disconnect the engine oil pressure sensor connector X201.
Use a multimeter to check for continuity between connector X201 pin A and chassis ground.
A. If continuity is found, continue with step 6.
B. If no continuity is found, continue with step 4.
4. Disconnect the engine harness from the main frame harness at connector X010. Use a multimeter to check for
continuity between the harness end of connector X010 pin 14 and chassis ground.
A. If there is continuity, the open circuit is in the engine (EN) harness between connector X010 pin 14 and
connector X201 pin A wire 853 blue or 468 blue. Locate the open and repair.
B. If there is no continuity to ground, continue with step 5.
5. Disconnect the main frame harness from the front frame harness at connector X008. Use a multimeter to check
for continuity between the harness end of connector X008 pin 14 and chassis ground.
A. If there is continuity, the open circuit is in the main frame (MF) harness between connector X010 pin 14
and connector X008 pin 14 wire 468 blue or 425 blue. Locate the open and repair.
POWER PRODUCTION - LUBRICATION SYSTEM
2 4/7/2006
B.60.A / 40