Cummins C15 96-Pin ECM Computer Board Wire Harness Connector – OEM 13964572 / 13964573 / 15494598 | Harness Plug

The OEM 13964572 / 13964573 / 15494598 / 13964569 / 15494614 are 96-pin ECM (Engine Control Module) computer board connectors used in Cummins heavy-duty diesel engine management systems. These part numbers cover the connector family used on the Cummins C15 (ISX, ISM, ISC) engine ECM harness. The 96-pin configuration consolidates all engine sensor inputs, actuator outputs, CAN bus, and power circuits for the ECM in a single high-density connector.

Key Specifications

• OEM Part Numbers: 13964572 / 13964573 / 15494598 / 13964569 / 15494614
• Pin count: 96-pin
• Type: ECM computer board harness plug
• Application: Cummins C15 / ISX / ISM / ISC engine ECM harness
• Compatible engines: Cummins ISX15, ISX12, ISM, ISC

Cummins ECM Connector Part Number Guide

• 13964572: ECM connector A (primary harness plug — engine sensors and actuators)
• 13964573: ECM connector B (secondary harness plug — vehicle interface and CAN bus)
• 15494598: ECM connector C (alternate variant or updated revision)
• 13964569: ECM connector D (additional circuit variant)
• 15494614: ECM connector E (updated revision)

96-Pin ECM Circuit Categories

• Engine sensor inputs (approx. 30 pins): Coolant temperature, oil pressure, boost pressure, fuel rail pressure, intake air temperature, exhaust temperature, NOx sensor, DPF differential pressure
• Actuator outputs (approx. 20 pins): Fuel injector control, EGR valve, VGT turbo actuator, throttle valve, DEF dosing
• CAN bus (4 pins): J1939 CAN bus (engine to vehicle CAN), diagnostic CAN
• Power and ground (8 pins): ECM power supply, switched power, multiple ground references
• Vehicle interface (approx. 20 pins): Vehicle speed, PTO control, cruise control, brake switch, clutch switch
• Diagnostic (4 pins): J1708/J1587 diagnostic bus, OBD-II diagnostic port

Common Fault Symptoms from ECM Connector Degradation

• Multiple simultaneous fault codes across different engine systems
• Intermittent fault codes that clear and return (connector working loose under vibration)
• ECM communication loss (U-codes for ECM not responding on J1939 CAN)
• Engine going into limp mode with no obvious single-system fault
• Fault codes that cannot be reproduced on the bench (vibration-sensitive connector fault)

Frequently Asked Questions

Q: My Cummins engine has multiple fault codes across different systems — is this the ECM connector?
A: Yes. Multiple simultaneous fault codes across unrelated systems (fuel, EGR, sensors, CAN bus) are a strong indicator of ECM connector degradation. A single corroded ECM connector pin can cause cascading faults across all systems that depend on that circuit. Inspect the ECM connector before replacing individual sensors or actuators.

Q: How do I inspect a 96-pin ECM connector?
A: Use a bright light and magnifying glass to inspect each pin cavity for corrosion (green or white oxidation), bent pins, or moisture. Use a terminal test probe to check for loose contacts. If corrosion is found on multiple pins, replace the entire connector rather than cleaning individual pins.