Illustration 1 | g02889936 |
Schematic of the Pitch/Rool sensor of the machine. |
This diagnostic code is associated with the pitch/roll sensor. This diagnostic code is active if the sensor is not detected on the data link.
Test Step 1. CHECK THE MACHINE HARNESS
- Verify that the contacts of the two connectors on the machine harness are properly wired. Refer to electrical schematic UENR1517.
Expected Result:
The harness is wired correctly.
Results:
- YES - The machine harness is wired correctly. Proceed to Test Step 2.
- NO - The machine harness is NOT wired correctly.
Repair: Repair the harness or replace the harness.
STOP
Test Step 2. CHECK THE RESISTANCE OF THE CAN DATA LINK
- Place the key start switch and the disconnect switch in the OFF position.
- Take the following measurement at the harness connector for the laser receiver. Measure the resistance across contact "3" and contact "4". Note the resistance.
Expected Result:
The resistance measurement is 60 (±5) ohms.
Results:
- YES - The resistance measurement is 60 (±5) ohms. Proceed to Test Step 4.
- NO - The resistance measurement is NOT 60 (±5) ohms. Proceed to Test Step 3.
Test Step 3. CHECK THE TERMINATION RESISTOR
- Disconnect the connector for the termination resistor.
- Measure the resistance across contact "A" and contact "B" of the termination resistor. Note the resistance.
- Measure the resistance across contact "C" and contact "D" of the quick disconnect at the laser receiver. Note the resistance.
Expected Result:
The resistance measurement is 60 (±5) ohms.
Results:
- YES - The resistance measurement is 60 (±5) ohms. Proceed to Test Step 4.
- NO - The resistance measurement is NOT 60 (±5) ohms.
Repair: If the termination resistor did not measure 60 (±5) ohms, then replace the termination resistor.If the measurement at the connector for the termination resistor was not 60 (±5) ohms, replace the harness or repair the harness.
STOP
Test Step 4. CHECK THE MACHINE HARNESS
- Disconnect the harness connectors from the ECM.
- Measure the resistance from contact "J2-45" on the ECM connector to contact "C" on the connector. Note the resistance.
- Measure the resistance from contact "J2-46" on the ECM connector to contact "D" on the connector. Note the resistance.
Expected Result:
The resistance measurements are 60 (±5) ohms.
Results:
- YES - All of the resistance measurements are 60 (±5) ohms.
Repair: Contact your technical communicator for a possible consultation with Caterpillar.
STOP
- NO - One of the resistance measurements are greater than 70 ohms.
Repair: Repair the harness or replace the harness.
STOP