Hitachi ZH200-5A Fault Code 13007-2: Complete Diagnostic Guide

What is Hitachi ZH200-5A Fault Code 13007-2?

Fault Code 13007-2 indicates a malfunction in the hydraulic pump solenoid circuit, specifically detecting an abnormal voltage or open circuit condition in the pump control system. This code is generated by the machine's Electronic Control Module (ECM) when it detects that the electrical signal to the hydraulic pump's proportional solenoid valve is outside the acceptable range.

In the ZH200-5A excavator, this circuit controls the variable displacement of the main hydraulic pump, which is critical for regulating hydraulic flow and pressure throughout the machine. When this code activates, the ECM may limit pump output to protect the hydraulic system, directly impacting machine performance and operational efficiency. This is particularly important in used excavators where electrical connections and solenoids experience cumulative wear from thousands of operating hours.

Common Symptoms

When fault code 13007-2 is active, operators typically experience:

• Reduced hydraulic power across all functions (boom, arm, bucket, and swing operations feel sluggish)
• Intermittent loss of hydraulic response, especially during cold starts or after extended operation
• Warning light illumination on the instrument cluster, often accompanied by an audible alarm
• Engine derating or automatic reduction in RPM to protect the hydraulic system
• Erratic hydraulic performance where functions work normally then suddenly lose power

Potential Causes

The most common technical causes for code 13007-2 in used ZH200-5A excavators include:

• Damaged wiring harness near the hydraulic pump mounting area, where vibration and heat cause insulation breakdown
• Corroded or loose connector pins at the pump solenoid plug (common in machines exposed to moisture)
• Failed proportional solenoid valve within the hydraulic pump assembly due to internal coil degradation
• ECM internal circuit failure affecting the solenoid driver output
• Voltage supply issues from the main power harness or ground connection problems
• Contaminated hydraulic oil causing solenoid valve sticking and increased electrical resistance

How to Troubleshoot and Fix Code 13007-2

Step 1: Visual Inspection Begin by inspecting the wiring harness running from the ECM to the hydraulic pump solenoid. On used excavators, check for harness rub points against the pump housing, frame rails, or hydraulic lines. Look for abraded insulation, pinched wires, or oil contamination on connectors. Clean all connector pins with electrical contact cleaner and inspect for corrosion or bent terminals.

Step 2: Electrical Testing Using a digital multimeter, disconnect the solenoid connector and measure resistance across the solenoid coil terminals. Typical resistance should be 3-8 ohms (consult service manual for exact specifications). Check for continuity to ground—any reading indicates a short circuit. With the key on and engine off, measure voltage supply at the connector; you should see battery voltage (12-14V) on the power wire.

Step 3: Solenoid and Circuit Verification If resistance and voltage are correct, perform a dynamic test using Hitachi's diagnostic software (Dr.EX or equivalent) to command the solenoid while monitoring current draw. Normal operation shows 1.5-2.5 amps. If the solenoid passes electrical tests but the code persists, inspect the ECM connector for corrosion and verify ground circuit integrity with a voltage drop test (should be less than 0.2V). For used machines, consider replacing the entire pump-to-ECM harness if multiple repair attempts have been made, as internal wire damage may not be visible.

Disclaimer: This guide provides general diagnostic information. Always consult the official Hitachi service manual for your specific machine serial number and consider professional assistance from certified technicians for complex electrical or hydraulic repairs.