Detail Information

Product Name:	134-6553 Controller ECU For 120H 140H Motor Grader	Material:	Steel
Place Of Origin:	Guangdong,China	MOQ:	1
OEM:	Support
Highlight:	134-6553 ECU Controller for 120H Motor Grader , 140H Motor Grader ECU Controller , Heavy Equipment ECU Controller with Warranty

Product Description

Controller ECU for 120H/140H Motor Grader

High-quality replacement Controller ECU (Part Number: 134-6553) designed for Caterpillar 120H and 140H Motor Graders. This used component offers reliable performance and is available from rich stock for quick delivery.

Product Specifications

Product Name	Controller ECU
Part Number	134-6553
Brand Name	JIAJUE
Compatible Models	120H/140H
Condition	Used
Availability	Rich Stock
Approximate Weight	2.5KG
Size (per unit)	20cm x 18cm x 15cm
Delivery Time	Usually delivered within 1-3 days after payment

Product Images

Frequently Asked Questions

Installation Time for ECM on Machine

Physical Installation: 15-30 minutes. The unit is typically secured by 4 bolts on the cool side of the engine.
Programming & Testing: 30-60 minutes.

Pro Tip: If the ECM is pre-programmed by us based on your machine's serial number, it is essentially "Plug & Play." If not, you will need a Cat ET (Electronic Technician) tool to flash the software, which takes additional time. We recommend professional installation to ensure correct parameter synchronization.

Determining ECM Fault and Replacement Need

The ET diagnostic tool cannot communicate with the ECM, or it displays a "Module Not Responding" error. This is a critical sign of internal hardware failure.
Active fault codes related to internal memory (EEPROM) or voltage reference issues that persist after checking the wiring harness often indicate ECM failure.
Sudden engine stalling, severe power loss (Limp Mode), or persistent misfiring (missing injector driver signals) after sensors and harnesses have been ruled out.
Visible signs of overheating (burning smell), water ingress, corrosion, or broken pins on the connector headers.

Step-by-Step Testing Guide

Pro-Tip: HEUI (Hydraulic Electronic Unit Injection) systems are extremely sensitive to contamination. A single speck of dust can cause premature failure.

Prepare: Ensure the excavator is turned off and safely secured. Disconnect the battery to avoid electrical accidents.
Inspect: Check the ECU for physical damage or loose connections.
Connect Diagnostic Tool: Use a diagnostic tool recommended by the excavator's manufacturer. Connect it to the ECU according to the tool's instructions.
Read Codes: Use the diagnostic tool to read any error codes (DTCs) stored in the ECU. These codes indicate potential problems with the ECU or connected systems.
Check Live Data: View live data parameters such as sensor readings and system voltages. Ensure they are within normal ranges.
Functional Tests: If possible, perform tests to activate components or simulate sensor inputs. Verify that the ECU responds correctly without delays or errors.
Reset (if needed): Reset the ECU if recommended by the manufacturer, especially after repairs or replacements.
Document: Keep a record of all tests, codes, and results for future reference.

Quick Checklist for Buyers: Before replacing the ECM, always check the fuses, main relays, and ground connections. In many cases, a faulty ground wire or low battery voltage mimics an ECM failure.

Business Information

Payment Methods: T/T, L/C, PayPal, etc.
Stock Availability: Rich stock available.
Order Shipping: When the goods ship, we will share the tracking number. For sea or air freight, we can provide the bill of lading.

Company & Facilities

Packaging & Shipping

Tag:

Place of Origin:	CHINA
Brand Name:	Jiajue
Model Number:	120H 140H

Minimum Order Quantity:	1pc
Price:	$800/pc
Packaging Details:	134-6553 Controller ECU for 120H 140H Motor Grader is Packed in standard export packing under customer's requirement
Delivery Time:	1-5 Works day
Payment Terms:	L/C,D/A,D/P,T/T,Western Union
Supply Ability:	100PCS/MONTH

134-6553 Controller ECU for 120H 140H Motor Grader

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