What is Hitachi ZX210K-3 Fault Code 13311-2?

Fault Code 13311-2 on the Hitachi ZX210K-3 excavator indicates a malfunction in the Engine Control Module (ECM) communication circuit, specifically a data link communication error with the hydraulic pump controller. This code signifies that the ECM is unable to properly receive or transmit information to the pump control system, which is critical for coordinating engine performance with hydraulic demand.

This fault is particularly serious on the ZX210K-3 because this model uses an integrated load-sensing system where the engine ECM and hydraulic pump controller must communicate constantly to optimize fuel efficiency and hydraulic response. When communication fails, the machine cannot properly match engine output to hydraulic load requirements, resulting in reduced performance and potential system protection modes.

Common Symptoms

When Code 13311-2 is active on your ZX210K-3, you may experience:

• Check engine light or warning lamp illuminated on the instrument cluster
• Noticeably sluggish hydraulic response across all functions (boom, arm, bucket, swing)
• Engine running at fixed RPM regardless of throttle input, often locked in a protective derate mode
• Intermittent loss of power during combined hydraulic operations (digging while slewing)
• Error messages on the multi-function display indicating communication faults

Potential Causes

The most common technical reasons for this code on used ZX210K-3 excavators include:

• Corroded or damaged connectors at the ECM or pump controller harness—particularly the 38-pin connector on the pump control unit
• Wiring harness chafing near the engine mount points or along the right-hand frame rail where the CAN bus wiring runs
• Failed hydraulic pump controller module due to moisture intrusion or component aging
• ECM internal fault or corrupted software requiring reprogramming
• Poor ground connections at G301 (engine block ground) or G104 (frame ground), common on machines with 5,000+ hours

How to Troubleshoot and Fix Code 13311-2

Step 1: Visual Inspection Begin by thoroughly inspecting the wiring harness between the ECM (located behind the cab, right side) and the hydraulic pump controller (mounted on the main pump). Look specifically for damaged insulation, corroded pins, or moisture in connectors. On used excavators, check where harnesses pass near moving components or sharp edges.

Step 2: Test Communication Circuit Using Hitachi's Dr.EX diagnostic software or a compatible CAN bus scanner, monitor real-time communication between the ECM and pump controller. Check for communication dropouts or error frames. Without diagnostic software, use a digital multimeter to verify 120-ohm termination resistance across the CAN-H and CAN-L terminals at both the ECM and pump controller connectors (pins vary by harness—consult service manual).

Step 3: Ground and Power Verification Verify battery voltage (12.8-14.4V) at the ECM and pump controller power supply pins with ignition on. Check ground circuit resistance—should be less than 0.5 ohms from component ground pins to battery negative. Clean and tighten ground points G301 and G104, which frequently corrode on older machines.

Step 4: Component Testing If wiring checks pass, disconnect the pump controller and inspect for water damage or burnt components. Test the ECM by swapping with a known-good unit if available. Before replacing expensive controllers on used equipment, consider connector replacement—corrosion-damaged pins often cause intermittent faults that mimic controller failure.

Disclaimer: This guide provides general troubleshooting information. For complex electrical diagnostics or component replacement on your specific machine, consult a certified Hitachi technician or authorized service center with access to model-specific repair procedures and genuine parts specifications.