YOKE-BRAKE 1376435 - Caterpillar

Illustration 1 g02727850
Accugrade Data LinkThis diagnostic code is recorded when the Implement ECM cannot receive data off the Accugrade data link from the blade rotation sensor. The Implement ECM should receive information from the Accugrade data link at a specific rate.Possible causes of this diagnostic code are listed:
The blade rotation sensor is not functioning.
The termination resistor on the Accugrade data link is disconnected.
The ECM has failed. This condition is unlikely.Test Step 1. CHECK THE INPUT VOLTAGE OF THE SENSOR.
Turn the key start switch to the ON position. Do NOT start the tractor.
Remove the floorplate.Note: Ensure that the tractor has cooled. Avoid contact with the manifold.
Disconnect the machine harness connector for the blade rotation sensor.
Measure the voltage across contact A (wire L872-BU) and contact E (wire T744-WH).Expected Result:The voltage that is measured is between 18 VDC and 32 VDC.Results:
YES - The voltage that is measured is between 18 VDC and 32 VDC. The sensor is receiving the correct voltage. Proceed to test step 2.
NO - The sensor is NOT receiving input voltage. Verify that the connector for the sensor and the harness are correct. Proceed to test step 2.Test Step 2. CHECK THE TERMINATION RESISTOR.
De-energize the system.
The machine harness connector for the sensor remains disconnected.
Measure the resistance across contact C (wire L854-YL) and contact D (wire L855-GN).Expected Result:The resistance that is measured is 60 10 ohms.Results:
YES - The resistance that is measured is 60 10 ohms. Repeat this test step. If the same results occur, an internal component to the sensor has failed.Repair: Replace the sensor.STOP
NO - The resistance that is measured is NOT 60 10 ohms.Repair: Replace the termination resistor.STOPTest Step 3. CHECK THE BATTERY VOLTAGE.
The engine should not be running.
At the battery, measure the voltage of the battery.Expected Result:The voltage that is measured is less than 18 VDC.Results:
YES - The voltage that is measured is less than 18 VDC. The voltage is NOT correct. Repair: Check the charging system. See Special Instruction, REHS0354.STOP
NO - The voltage that is measured is between 18 and 32.5 VDC. There is an open in the circuit between the battery and the sensor.Repair: Repair the machine harness or replace the machine harness.STOP