What is Hitachi ZW310-5A Fault Code 111705-10?

Fault Code 111705-10 on the Hitachi ZW310-5A wheel loader indicates a communication error or malfunction within the machine's CAN (Controller Area Network) system, specifically related to data transmission between the engine ECM (Engine Control Module) and the main machine controller. This diagnostic trouble code (DTC) signals that critical system components are not exchanging information properly, which can severely impact machine performance and safety systems.

The CAN bus network serves as the central nervous system for modern Hitachi excavators and wheel loaders, allowing multiple control modules to communicate seamlessly. When Code 111705-10 appears, it means the transmission protocol has been interrupted or corrupted between controllers. This is particularly critical for the ZW310-5A because the machine relies on coordinated communication between the engine management system, hydraulic controllers, and transmission ECU to optimize performance and fuel efficiency. Without proper CAN communication, the machine may enter a protective derate mode or experience erratic behavior.

Common Symptoms

When fault code 111705-10 is active on your Hitachi ZW310-5A, operators typically experience:

• Dashboard warning lights illuminating, including the malfunction indicator lamp (MIL) or check engine light
• Intermittent loss of gauge functionality – engine RPM, temperature, or hydraulic pressure readings may freeze or disappear
• Reduced engine power or derate mode activation, limiting the machine to low-idle or significantly reduced horsepower
• Erratic transmission shifting or failure of the powershift transmission to respond properly to commands
• Complete shutdown in severe cases, where the ECM cannot verify safe operating parameters

Potential Causes

The most common technical causes for Code 111705-10 on used Hitachi ZW310-5A machines include:

• Damaged CAN bus wiring harness – particularly in areas subject to vibration, heat, or mechanical wear near the engine bay or beneath the operator cab
• Corroded or loose connector pins at the ECM, transmission controller, or junction box connections (common in machines exposed to moisture or salt environments)
• Failed termination resistors on the CAN network, causing signal reflection and data corruption
• ECM or controller module failure – age-related capacitor degradation or moisture intrusion in control units
• Poor ground connections affecting the reference voltage for CAN communication (check chassis ground points for corrosion)
• Aftermarket component interference – non-OEM monitors, radios, or tracking devices improperly spliced into the CAN network

How to Troubleshoot and Fix Code 111705-10

Step 1: Perform Visual Inspection Begin by thoroughly inspecting all wiring harnesses in the engine compartment and along the chassis frame. On used ZW310-5A machines, pay special attention to harness routing near the engine mounts, hydraulic pump area, and underneath the cab where cables experience flexing. Look for abraded insulation, pinched wires, or evidence of rodent damage. Check all CAN bus connectors (typically Deutsch or AMP-style connectors) for bent pins, corrosion, or moisture intrusion.

Step 2: Test CAN Network Integrity Using a digital multimeter, measure the resistance across the CAN-High and CAN-Low terminals at the diagnostic connector (usually located in the operator cab). With the key off and all modules connected, you should read approximately 60 ohms, indicating proper termination resistors at each end of the network. A reading of 120 ohms suggests one termination resistor has failed; infinity means an open circuit in the CAN wiring.

Step 3: Verify Ground Connections Check all chassis ground points and ECM ground connections with a multimeter. There should be less than 0.5 ohms resistance between the ECM ground and the battery negative terminal. On used excavators, corrosion at ground lugs is extremely common and can cause intermittent communication faults.

Step 4: Use Diagnostic Software Connect Hitachi Dr.EX diagnostic software or compatible scan tool to retrieve freeze frame data and monitor live CAN bus activity. Check for additional codes that may pinpoint which specific module is failing to communicate. The software can identify whether the engine ECM, transmission controller, or main machine controller is the source of the communication failure.

Step 5: Isolate and Replace Components If wiring and connections check out, systematically disconnect non-essential devices from the CAN network (auxiliary displays, telematics devices) to identify potential interference sources. For used machinery, controller modules may need replacement if internal circuits have failed due to age or environmental exposure.

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Disclaimer: This guide provides general troubleshooting information for Code 111705-10. Always consult the official Hitachi service manual for your specific machine serial number and seek assistance from qualified Hitachi-certified technicians for complex electrical diagnostics and repairs. Improper diagnosis can lead to costly component replacement and extended downtime.