What is Hitachi ZX360H-5G Fault Code 13310-3?

Fault Code 13310-3 on the Hitachi ZX360H-5G indicates a malfunction in the Engine Control Module (ECM) communication circuit, specifically a CAN (Controller Area Network) bus communication error between the engine controller and the machine's main monitoring system. This code triggers when the ECM fails to receive or transmit data packets properly through the CAN bus network, which is the digital communication backbone connecting all electronic control units in modern excavators.

This fault is critical because the CAN bus enables real-time data sharing between the engine management system, hydraulic controllers, and operator display. When communication breaks down, the machine cannot properly coordinate fuel injection timing, hydraulic flow rates, or emissions controls, potentially causing the ZX360H-5G to enter a protective derate mode or display inaccurate operational data.

Common Symptoms

• Warning light activation on the instrument cluster, typically the engine malfunction lamp or system error indicator
• Intermittent or complete loss of engine parameter readings on the monitor display (RPM, coolant temperature, fuel level)
• Reduced engine power or activation of limp mode, limiting machine performance to protect components
• Erratic hydraulic response due to improper coordination between engine output and hydraulic demand
• Multiple secondary fault codes appearing simultaneously as other systems lose communication with the ECM

Potential Causes

The most common technical causes for Code 13310-3 on used ZX360H-5G excavators include:

• Corroded or loose CAN bus connectors at the ECM harness connection points, particularly the 38-pin main connector
• Damaged wiring harness due to chafing against the engine block or frame rails near the fuel filter assembly—a known wear point on this model
• Failed termination resistors in the CAN network (120-ohm resistors at network endpoints)
• ECM internal fault caused by voltage spikes, moisture intrusion, or component aging in high-hour machines
• Poor ground connections at the engine block grounding points, causing signal interference
• Aftermarket component interference from improperly installed accessories disrupting the CAN network

How to Troubleshoot and Fix Code 13310-3

Step 1: Visual Inspection Begin by thoroughly inspecting the engine wiring harness, focusing on areas where the harness contacts metal surfaces. On used excavators, check for wire insulation wear near the fuel filter bracket and along the right side engine mount. Examine all CAN bus connectors (typically yellow or green color-coded) for corrosion, bent pins, or moisture. Clean connectors with electrical contact cleaner and apply dielectric grease.

Step 2: Electrical Testing Using a digital multimeter, verify CAN-High and CAN-Low voltage at the ECM connector. With ignition on and engine off, you should measure approximately 2.5V on both lines. Check termination resistance by disconnecting the network and measuring between CAN-High and CAN-Low terminals—you should read approximately 60 ohms (two 120-ohm resistors in parallel). Verify ground integrity at the engine block; resistance to battery negative should be less than 0.5 ohms.

Step 3: Advanced Diagnostics Connect Hitachi Dr.EX diagnostic software or compatible J1939 scan tool to monitor live CAN bus traffic. Check for communication dropouts or error frames. If harness and connections test properly, suspect ECM failure. On used machines with over 8,000 hours, ECM capacitor degradation is common. Before replacing the ECM (approximately $1,200-2,500), swap with a known-good unit if available to confirm diagnosis.

Disclaimer: This guide provides general troubleshooting information. Always consult the official Hitachi service manual for your specific serial number range and consider engaging a certified technician for complex electrical diagnostics. Improper repairs to the CAN network can cause additional system failures.