What is Hitachi ZX210K-5G Fault Code 14107-2?

Fault Code 14107-2 on the Hitachi ZX210K-5G excavator indicates a malfunction in the Engine Controller (ECM) communication circuit, specifically detecting an abnormal voltage signal or open circuit condition in the CAN (Controller Area Network) communication line. This code is part of Hitachi's proprietary diagnostic system and signals that the Engine Control Module cannot maintain proper data transmission with other critical machine controllers.

This fault is particularly serious because the ZX210K-5G relies on continuous ECM-to-machine communication for coordinating engine performance with hydraulic demands, emissions controls, and operator interface displays. When this communication link fails, the excavator's integrated systems cannot function optimally, potentially triggering protective derate modes that limit machine productivity.

Common Symptoms

• Warning lamp illumination on the instrument cluster, often accompanied by a wrench or diagnostic icon
• Engine derate mode activation, limiting RPM to 1,200-1,500 range regardless of throttle input
• Intermittent loss of display data on the monitor panel, including engine temperature, fuel level, or hydraulic oil temperature readings
• Erratic engine performance during load changes, with delayed throttle response or unexpected power drops
• Multiple secondary fault codes appearing simultaneously due to cascading communication failures across the CAN network

Potential Causes

The most common technical causes for Code 14107-2 on used ZX210K-5G excavators include:

• CAN bus wiring harness damage from chafing against the engine block or chassis, particularly near the battery box area where harness routing is tight
• Corroded or loose connector pins at the ECM connector (C101) or main machine harness junction points, especially on machines operating in wet or coastal environments
• Failed termination resistor in the CAN communication network (120-ohm resistor failure causes signal reflection issues)
• ECM internal failure due to moisture intrusion or voltage spikes, more common in excavators with 5,000+ operating hours
• Aftermarket component interference, such as poorly installed telematics devices or non-OEM monitoring systems tapping into the CAN network

How to Troubleshoot and Fix Code 14107-2

Step 1: Visual Inspection and Connector Check Begin by inspecting the main engine harness from the ECM (located behind the operator cab, left side) to the chassis ground points. On used excavators, pay special attention to harness routing near the hydraulic pump—this is a known wear point. Disconnect the ECM connector C101 and inspect all pins for corrosion, bent terminals, or moisture. Clean contacts with electrical contact cleaner and apply dielectric grease before reconnecting.

Step 2: CAN Bus Voltage and Resistance Testing Using a digital multimeter, measure the resistance between CAN-High and CAN-Low terminals at the ECM connector with the key off and all connectors attached. You should read approximately 60 ohms (two 120-ohm termination resistors in parallel). A reading of 120 ohms indicates one failed termination resistor; infinite resistance suggests an open circuit in the wiring. With ignition on but engine off, measure voltage on CAN-High (should be approximately 2.5-3.5V) and CAN-Low (1.5-2.5V relative to ground).

Step 3: Diagnostic Software Verification Connect Hitachi Dr.EX diagnostic software or compatible scan tool to verify real-time communication status. Monitor the CAN bus activity while wiggling harness sections to identify intermittent connection failures. For used machines, check the ECM software version—outdated firmware can cause communication protocol mismatches. If all wiring and resistance values are correct but the code persists, perform an ECM power supply test (verify clean 24V supply with less than 0.5V ripple).

Step 4: Repair and Verification Replace damaged harness sections using OEM-spec shielded twisted-pair cable (not standard automotive wire). Ensure proper wire gauge (typically 20 AWG for CAN circuits) and maintain the twisted-pair configuration to prevent electromagnetic interference. After repairs, clear codes, operate the machine through full work cycles, and re-scan to confirm the fault does not return.

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Disclaimer: This guide provides general troubleshooting information for experienced technicians. Always consult the official Hitachi service manual for your specific machine serial number and consider professional diagnostic assistance for complex electrical issues. Improper repairs to CAN bus systems can cause additional controller damage.