Generator 3701100XEG71 301349RID, CAL30225GS 301349RIH，210711A for Harvard H2 H6

The installation logic of the 12V generator for Haval H2 and Haval H6 is basically the same. Only Haval H2 and some model years of Haval H6 require additional OBD matching and BMS calibration steps. Below is a universal and detailed installation method. It is recommended to prepare tools such as wrenches, screwdrivers, belt tensioners, and an OBD scanner (compatible with some models) before operation:

Park the vehicle on a flat road, pull the handbrake firmly, turn off the engine, and pull out the car key. Disconnect the negative cable of the storage battery to prevent short circuits that may damage electrical components during installation. If the power is cut off for a long time, a vehicle system memory saver can be used to avoid loss of system settings.Confirm that the model of the new 12V generator is compatible with the vehicle, and prioritize original factory or authorized brand accessories. Check that the new generator has no external damage and that accessories such as the pulley and wiring terminals are complete. Prepare tools including wrenches, screwdrivers, and belt tensioners at the same time.

Open the engine hood, locate the generator. Use a belt tensioner tool to loosen the generator belt tensioner and remove the drive belt, taking care to avoid bumps caused by the belt popping out.Unplug the generator's wire connector—some connectors have buckles, so press the buckle gently before pulling. Then loosen and remove the fixing bolts of the generator, and take out the old generator smoothly.Clean dust and oil from the generator installation position to ensure the mounting surface is clean and avoid affecting the fit of the new generator.

Place the new generator steadily on the engine's mounting bracket, align with the mounting holes, and insert the fixing bolts. Tighten them initially but not fully, leaving space for subsequent adjustment of belt tension. Ensure the generator pulley and the engine-side pulley are on the same plane to prevent belt deviation and wear during operation.

Wire according to the recorded line positions when removing the old generator, or refer to the terminal marks: usually, thick wires correspond to power circuits, and thin wires correspond to control circuits. Ensure the connector is fully inserted, then tighten the fixing nuts of the wiring terminals with a wrench. Wrap a small amount of insulating tape for protection if necessary.Use the belt tensioner to pull open the tensioning device, and accurately fit the drive belt into the grooves of the generator pulley. After releasing the tensioner, press the middle of the belt—if it sinks 1-2 centimeters, the tension is appropriate. An overly loose belt is prone to slipping, while an overly tight one will accelerate bearing wear.

This additional step is needed for Haval H2 and some model years of Haval H6. Connect the OBD scanner to the vehicle, enter the vehicle control system, find the "Generator Settings" or "Electrical System Initialization" option, and input parameters such as the output current of the new generator. Then enter the BMS module for calibration to allow the vehicle system to adapt to the charging status of the new generator and battery.

Fine-tune the generator position to confirm no deviation, then fully tighten the fixing bolts with a wrench to ensure the generator body is stable without shaking. Reconnect the negative cable of the storage battery and tighten the terminal nut.Start the vehicle and observe if the charging indicator light on the instrument panel turns off. If a multimeter is available, measure the storage battery voltage—13.5-14.5V at idle is normal. Meanwhile, pay attention to any abnormal noise during generator operation and check for issues such as belt misalignment and loose wiring.If the indicator light remains on, the voltage is abnormal, or there is abnormal noise, turn off the engine immediately. Recheck the circuit connection, belt installation, and bolt tightness, and restart the vehicle only after troubleshooting.

The core precautions for installing the 12V generator of Haval H2 and H6 focus on safety protection, installation accuracy, adaptation and calibration, and operation verification. Details are as follows:

Disconnect the negative terminal of the storage battery first throughout the entire process. Do not turn on the power until all wiring and belt installation are completed to avoid short circuits and sparks.Keep away from high-temperature engine components (such as the exhaust pipe and turbocharger) during disassembly and installation to prevent scalds. Hold tools firmly to avoid dropping them into the engine compartment and causing mechanical failures.Do not touch the generator's B+ terminal and the body simultaneously with metal tools, nor pull the wire connector, to prevent damage to the terminal or line breakage.

Tighten the generator's fixing bolts according to the vehicle's specified torque (usually 25-35N・m). The mounting surface must be clean and free of oil and debris to avoid loosening of the body due to vibration.The pulley must be strictly aligned with the engine-side pulley on the same plane. The belt tension should be controlled to "1-2 centimeters of sinking when pressed"—both excessively loose and tight belts will shorten the service life of the belt and bearings.Wiring must strictly correspond to terminal marks to distinguish between thick power wires and thin control wires. The connector must be fully clamped. After tightening the terminal nuts, gently pull the wires to confirm they are not loose. Wrap a small amount of insulating tape for protection if necessary.

OBD matching and BMS calibration are mandatory for Haval H2 and some model years of Haval H6. Failure to calibrate will result in abnormal charging, instrument panel alarms, and even battery damage.Use an OBD scanner compatible with the vehicle model for calibration. Input generator parameters as prompted, and clear fault codes after calibration to ensure the system correctly identifies the new generator.If you do not have calibration equipment or experience, it is recommended to have this step completed by a professional repair shop to avoid incorrect parameter input.

Before starting the vehicle, recheck the circuit connections, belt installation, and bolt tightness. Reconnect the negative terminal of the storage battery only after confirming everything is in order.After starting, first observe if the charging indicator light turns off. Measure the idle voltage with a multimeter (13.5-14.5V is normal) and listen for any abnormal noise from the generator.Within 1-2 days after installation, recheck the belt tension, wiring terminals, and fixing bolts to prevent loosening due to vibration. Be sure to review before long-distance driving to avoid breakdowns on the way.

The installation method and precautions for the 12V generator of Haval H2 and H6 you previously inquired about do not come from Haval's official exclusive maintenance manual or a single authoritative original factory document. Instead, they are integrated based on general specifications in the automotive maintenance field and the adaptability key points of these two models. The information sources for the relevant content can refer to the following types of platforms and content:

This platform contains content related to the generator installation of different versions of Haval H2 and H6. For example, it mentions the disassembly and assembly steps of Haval H2's generator and precautions for plugging and unplugging wires; it also covers details such as the installation position of the generator for Haval H6 1.5T version, belt installation and tensioner adjustment methods, as well as reminders on screw tightening torque during installation. These are highly consistent with the installation key points and precautions you care about.

As a well-known platform in the automotive field, it has published multiple articles on general generator installation specifications. The content included, such as disconnecting the negative terminal of the storage battery to prevent short circuits, belt tension adjustment standards, requirements for correct wiring, and post-installation voltage test range (e.g., 13.8-14.5V during operation), are general guidelines for the generator installation of common passenger cars like Haval H2 and H6, and also serve as important reference bases for relevant installation precautions.

The introduction to the general process of generator disassembly and assembly in its automotive encyclopedia section—such as tool preparation before installation, reverse operation logic for disassembly and assembly, bolt torque control, and wire marking and precise connection—is also applicable to the installation of 12V generators for Haval H2 and H6, providing general technical support for the installation precautions of these models.