Fault Description: Haldex GEN3+EB+ HGV Brake Unit Air Pressure Failure
Fault Codes: The following fault codes may be logged in the Haldex GEN3+EB+ HGV brake unit:
1. SPN 2308 – FMI 2: Brake Circuit Failure, Rear Axle
2. SPN 2312 – FMI 2: Brake Circuit Failure, Front Axle
3. SPN 2313 – FMI 2: Brake Circuit Failure, Center Axle 1
4. SPN 2314 – FMI 2: Brake Circuit Failure, Center Axle 2
5. SPN 2344 – FMI 2: Internal Air Pressure Sensor, Signal Out of Range High
6. SPN 2344 – FMI 3: Internal Air Pressure Sensor, Signal Out of Range Low
7. SPN 2344 – FMI 4: Internal Air Pressure Sensor, Voltage Below Normal
8. SPN 2344 – FMI 5: Internal Air Pressure Sensor, Voltage Above Normal
Affected Vehicles and Production Years: The Haldex GEN3+EB+ HGV brake unit is commonly fitted to various heavy goods vehicles (HGVs) and commercial trucks. The specific vehicle models and production years can vary, as Haldex units may be installed in different HGV brands and configurations. Therefore, it’s essential to refer to the vehicle manufacturer’s specifications for accurate fitment details.
Description:
The Haldex GEN3+EB+ HGV brake unit is a crucial component in heavy goods vehicles and commercial trucks equipped with an electronically controlled air brake system. It operates the Haldex brake control module, which manages the application and release of air pressure to the brake chambers, ensuring precise brake control and modulation.
One common fault that can occur with the Haldex GEN3+EB+ HGV brake unit is the loss of air pressure to various brakes on the HGV. This can lead to uneven or partial brake application, resulting in reduced braking performance and compromised vehicle control.
In addition to the air pressure failure, faults related to internal air pressure sensors can also occur within the brake unit. These faults may cause incorrect readings of air pressure levels, leading to issues with brake system monitoring and control.
When the Haldex GEN3+EB+ HGV brake unit detects a fault with the air pressure or internal air pressure sensors, it may log one or more of the above-mentioned fault codes to indicate the specific issue. The fault codes “SPN 2308 – FMI 2” to “SPN 2314 – FMI 2” pertain to brake circuit failures on different axles, indicating no air pressure to specific brake chambers. The fault codes “SPN 2344 – FMI 2/3/4/5” relate to internal air pressure sensor issues.