Hitachi ZX200-5G Fault Code 13310-3: Complete Diagnostic Guide

What is Hitachi ZX200-5G Fault Code 13310-3?

Fault Code 13310-3 indicates a communication error between the Engine Control Module (ECM) and the Hydraulic Pump Control System on the Hitachi ZX200-5G excavator. This code specifically signals that the ECM has detected an abnormal or interrupted signal from the pump control solenoid valve circuit, preventing proper coordination between engine output and hydraulic demand.

This fault is critical because the ZX200-5G relies on precise electronic communication to match engine RPM with hydraulic pump displacement. When this communication fails, the machine cannot optimize fuel efficiency or hydraulic performance, potentially causing unexpected power loss or erratic hydraulic response during operation.

Common Symptoms

Operators experiencing Code 13310-3 typically notice:

• Reduced hydraulic power or sluggish boom/arm movement despite normal engine RPM
• Intermittent engine derate where the machine suddenly limits power output
• Warning lamp illumination on the instrument cluster (typically the engine diagnostic light)
• Erratic engine speed fluctuation when operating multiple hydraulic functions simultaneously
• Increased fuel consumption due to the ECM operating in failsafe mode without proper pump feedback

Potential Causes

The most common technical failures triggering this code on used ZX200-5G excavators include:

• Corroded or damaged wiring harness connectors at the pump control solenoid (especially the 8-pin connector near the main pump)
• Failed pump control proportional solenoid valve due to internal coil breakdown or contaminated hydraulic oil
• Harness chafing at known rub points between the engine bay and pump assembly mounting bracket
• ECM internal fault or corrupted calibration data (less common but possible in high-hour machines)
• Poor ground connections at the chassis grounding point behind the operator's cab
• Voltage supply issues from the main power relay or degraded battery cables on older machines

How to Troubleshoot and Fix Code 13310-3

Step 1: Visual Inspection Inspect the wiring harness running from the ECM to the hydraulic pump assembly. On used excavators, check for abraded insulation at the frame rail near the fuel tank and where the harness passes through the engine compartment bulkhead. Examine all connector pins for corrosion, bent terminals, or oil contamination.

Step 2: Electrical Testing Using a digital multimeter, measure resistance across the pump control solenoid coil (typically 8-12 ohms at 20°C). Check for supply voltage at the solenoid connector with the ignition on (should read approximately 12V). Verify ground circuit continuity to chassis (less than 0.5 ohms resistance).

Step 3: Solenoid Function Test With Hitachi diagnostic software (Dr.EX) or compatible scan tool, perform an active output test on the pump control solenoid. Listen for distinct clicking and feel for magnetic actuation. If the solenoid fails to respond, replace it after confirming hydraulic oil cleanliness (contamination accelerates solenoid failure).

Step 4: Harness and Ground Verification Clean and re-torque all ground connections, particularly the main engine ground strap. For used machines with over 8,000 hours, consider replacing the entire pump control harness as preventive maintenance, as internal wire fractures often occur without visible external damage.

Disclaimer: This guide provides general diagnostic procedures. Always consult the official Hitachi service manual for your specific machine serial number, and consider professional diagnostic assistance for complex electrical issues or if you lack proper diagnostic equipment.