Case IH AFX8010 Repair Manual page 1082

Sensing system Oil temperature - Short circuit to ground
(B.60.A.95.92 - G.30.B.53)
AFX8010
E0153-04 - Engine Oil Temperature Sensor
Cause:
The engine oil temperature sensor (B-03) circuit is shorted to ground.
Possible failure modes:
1. Sensor supply wiring shorted to ground.
2. Controller internal failure (internal regulator failure).
Solution:
1.
Enter the Universal Display Plus "DIAG" screen. Select the "ENGINE" sort menu, and select "OIL TEMP
SEN" to check the voltage range.
The proper voltage range is 0.5 - 4.9 volts.
A. If the voltage reading is low out of range (0 - 0.5 volts), continue with Step 2.
B. If the voltage reading is within the proper limits, continue the troubleshooting at Step 5.
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. Disconnect the engine oil temperature sensor connector X311.
A. If the voltage increases to 4.9 - 5.2 volts, the short is in the sensor or sensor wiring. Replace the sensor.
B. If the voltage remains low out of range, continue with Step 3.
3. Disconnect the Iveco engine harness from the engine (EN) harness at connector X197.
A. If the voltage increases to 4.9 - 5.2 volts, the short is in the Iveco engine harness between connector
X197 pin 9 and connector X311 pin 1 on the blue wire. Locate the short and repair.
B. If the voltage remains low out of range, continue with Step 4.
4. Disconnect the engine (EN) harness from the main frame (MF) harness at connector X010.
A. If the voltage increases to 4.9 - 5.2 volts, the short is in the engine (EN) harness between connector
X010 pin 10 and connector X197 pin 9 wire 504 yellow. Locate the short to ground and repair.
B. If the voltage remains low out of range, the short is in the main frame (MF) harness between connector
X010 pin 10 and connector X016 pin J2-27 wire 504 yellow. Locate the short to ground and repair.
5. Operate the machine while monitoring Universal Display Plus "DIAG" screen.
A. If no low out of range readings are indicated, erase the fault code and continue operation.
POWER PRODUCTION - LUBRICATION SYSTEM
9676 1 27/05/2004
B.60.A / 16