D3G, D4G and D5G Track-Type Tractors AccuGrade Laser Caterpillar


CB 6 Wrong Blade Motion

Usage:

D3G BYR
Conditions Which Generate This Code:

This diagnostic code is associated with the calibration of the lift valve and the tilt valve. The blade is moving in the wrong direction during the calibration procedure.

System Response:

When this diagnostic code is active the calibration procedure is terminated.

Test Step 1. CHECK THE HYDRAULIC OPERATION

  1. Use the "Test Valves" menu in order to verify that the hydraulic operation is correct.

    Refer to Systems Operation, "Menus".

Expected Result:

The hydraulic operation is correct.

Results:

  • YES - The hydraulic operation is correct. Proceed to Test Step 2.

  • NO - The hydraulic operation is not correct.

    Repair: Ensure that the hydraulic lines correctly assembled to the valve. Repeat the calibration procedure.

    Stop.

Test Step 2. CHECK THE VOLTAGE AT THE SOLENOID PLUG




Illustration 1g01098948

(1) Lift Valve

(2) Lift Valve Solenoid

(3) Lift Valve Fault Monitoring LED

(4) Tilt Valve Fault Monitoring LED

(5) Tilt Valve Solenoid

(6) Tilt Valve

  1. Connect a volt meter to pin 2.

  1. Perform the "Test Valves" function in the "Diagnostics" menu in order to measure the voltage on pin 2. The voltages are listed in Table 1.

    Table 1
    Electrical Actuating Module    
    Pin     Function     Voltage    
    1     Supply     System Voltage    
    2     Drive Signal     Null = 50% of System Voltage
    Lift = 50%-75% System Voltage
    Lower = 50%-25% System Voltage    
    3     Fault Status     Low = <2VDC
    High = System Voltage    
    4     Ground        

Expected Result:

Voltage levels are opposite according to Table 1.

Results:

  • YES - Voltage levels are opposite.

    Repair: Rewire the valve. Repeat the calibration procedure.

    Stop.

  • NO - The voltage levels are correct.

    Repair: Repeat the calibration procedure.

    Stop.

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