What is Caterpillar Fault Code CID1713?

Caterpillar fault code CID1713 indicates a communication error or data link failure within the machine's CAN (Controller Area Network) bus system. This diagnostic trouble code specifically signals that the Electronic Control Module (ECM) has detected abnormal or missing communication from a networked component on the data bus.

The CAN bus system serves as the central nervous system for modern Caterpillar excavators, allowing multiple electronic control modules—including the engine ECM, hydraulic controllers, display modules, and various sensors—to communicate seamlessly. When CID1713 appears, it means one or more components have stopped transmitting data properly, which can severely impact machine diagnostics, performance monitoring, and coordinated system operations. This is particularly critical in used excavators where electrical connections may have degraded over time due to vibration, moisture intrusion, or connector corrosion.

Common Symptoms

• Warning lights illuminated on the instrument cluster, often including the malfunction indicator lamp (MIL) or diagnostic lamp
• Display screen errors or loss of certain gauge readings (fuel level, temperature, or hour meter malfunctions)
• Intermittent or complete loss of throttle control or hydraulic function coordination
• Engine derate mode activation in severe cases, limiting machine power output to protect systems
• Inability to retrieve diagnostic information through the monitor panel or connectivity issues with Cat Electronic Technician (ET) software

Potential Causes

• Damaged or corroded CAN bus wiring harness, especially at common rub points near the engine mount, swing bearing, or undercarriage
• Faulty termination resistors at either end of the CAN bus network (120-ohm resistors that maintain signal integrity)
• Failed electronic control module (ECM, display module, or secondary controller) no longer transmitting on the network
• Loose or corroded connectors at the Deutsch or AMP-style plugs connecting modules to the data bus
• Water intrusion into connector housings, particularly common in used machines with compromised seals
• Aftermarket component interference from improperly integrated accessories or monitoring systems

How to Troubleshoot and Fix Code CID1713

Step 1: Visual Inspection of Harnesses and Connectors Begin by thoroughly inspecting all CAN bus wiring (typically twisted-pair orange and yellow wires on Caterpillar machines). Check for obvious damage, chafing, pinch points, or harness routing issues. On used excavators, pay special attention to areas where harnesses pass through the swing bearing or near moving hydraulic lines. Disconnect and inspect all CAN bus connectors for corrosion, bent pins, or moisture—clean with electrical contact cleaner if needed.

Step 2: Test CAN Bus Resistance Using a digital multimeter, measure resistance across the CAN-High and CAN-Low lines with all modules disconnected. You should read approximately 60 ohms (two 120-ohm termination resistors in parallel). If readings show open circuit (infinite resistance) or incorrect values, locate and replace faulty termination resistors or repair broken wiring. Check resistance at multiple connection points to isolate the problem section.

Step 3: Diagnose with Cat Electronic Technician (ET) Connect Cat ET diagnostic software to identify which specific module has stopped communicating. The software will show active and inactive network addresses. If a particular module (such as the implement control module or display) isn't responding, focus troubleshooting on that component's power supply, ground connections, and dedicated wiring. Verify supply voltage (typically 8-14V) and ground continuity at the suspect module.

Step 4: Address Used Equipment Considerations For older machines, connector corrosion is the leading cause of CID1713. Apply dielectric grease to all reassembled connectors to prevent future moisture issues. Consider replacing entire harness sections that show signs of insulation brittleness or multiple previous repairs—patch jobs often fail again quickly.

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Disclaimer: This guide provides general troubleshooting information for CID1713 on Caterpillar excavators. Always consult the specific service manual for your machine model and serial number. Complex electrical diagnostics should be performed by qualified technicians with proper diagnostic equipment. Improper repairs to CAN bus systems can cause additional faults or safety hazards.