Hitachi ZX160LC-5B Fault Code 14107-2: Complete Diagnostic Guide

What is Hitachi ZX160LC-5B Fault Code 14107-2?

Fault Code 14107-2 indicates a malfunction in the Engine Control Module (ECM) communication circuit, specifically related to a CAN (Controller Area Network) bus communication error or timeout condition. This code triggers when the main ECM loses proper data transmission with peripheral control systems or sensors on the machine's electronic network.

In the Hitachi ZX160LC-5B, the CAN bus system serves as the central nervous system, allowing the engine controller, hydraulic controller, and monitoring systems to exchange critical operational data. When communication breaks down, the ECM cannot properly regulate engine performance, hydraulic functions, or emissions controls. This fault is particularly critical because it can cause the machine to enter derate mode or prevent startup entirely, directly impacting jobsite productivity.

Common Symptoms

When fault code 14107-2 is active, operators typically experience:

• Engine warning light illuminated on the instrument cluster, often accompanied by a check engine indicator
• Reduced engine power or automatic derate to protect the engine from operating without proper sensor feedback
• Erratic hydraulic response or sluggish boom/arm movements due to interrupted controller communication
• Intermittent gauge failures where the monitor displays incorrect readings or goes blank
• Difficulty starting or the engine starting then immediately shutting down due to communication verification failures

Potential Causes

The most common technical causes for this fault code in used ZX160LC-5B excavators include:

• Corroded or damaged CAN bus connectors, particularly at the ECM harness connection points behind the operator cab
• Wiring harness chafing at known rub points near the engine mount and along the right-side frame rail where cables route to the hydraulic pump controller
• Failed termination resistors on the CAN network (typically 120-ohm resistors at network endpoints)
• ECM internal failure or corrupted software, more common in machines with 8,000+ operating hours
• Voltage supply issues from corroded battery terminals or failing alternator causing network instability
• Water intrusion into connector housings, especially on machines operated in wet conditions without proper seal maintenance

How to Troubleshoot and Fix Code 14107-2

Step 1: Visual Inspection Begin with a thorough inspection of all wiring harnesses along the CAN bus network. On used excavators, focus on areas where harnesses pass through bulkheads or near moving components. Look for abraded insulation, crushed wires, or green corrosion on connector pins. Pay special attention to the main ECM connector (typically a 48-pin connector) and the hydraulic controller connector near the pump.

Step 2: Electrical Testing Using a digital multimeter, verify proper CAN bus voltage between the CAN-High and CAN-Low wires. You should measure approximately 2.5V with the key on, engine off. Check for 120-ohm resistance across the CAN-High and CAN-Low terminals with all controllers disconnected—this confirms termination resistors are intact. Test battery voltage (should be 12.5-13V minimum) and alternator output (13.8-14.4V at idle).

Step 3: Connector Service Disconnect and clean all CAN network connectors using electrical contact cleaner. Inspect for bent pins, moisture, or corrosion—common issues in used machines. Apply dielectric grease to all connections before reassembly to prevent future corrosion.

Step 4: Diagnostic Software Analysis Connect Hitachi Dr.EX diagnostic software or a compatible scan tool to retrieve freeze frame data and monitor live CAN bus communication. This will identify which specific controller is dropping offline. Check for additional stored codes that may indicate the root cause.

Step 5: Component Replacement If testing reveals a specific failed component, replace the faulty controller, damaged harness section, or ECM as needed. For used excavators, always verify replacement parts are compatible with your machine's software version to avoid further communication errors.

---

Disclaimer: This guide provides general diagnostic information. Complex electrical issues may require professional diagnosis with manufacturer-specific tools. Always consult a certified Hitachi technician or qualified heavy equipment mechanic for repairs beyond your expertise level.