Description
Start-Stop System Inverter Unit for Citroën and Peugeot Vehicles
This Start-Stop inverter unit is designed for Citroën and Peugeot models and addresses the electrical management between the vehicle battery and the engine Start‑Stop function. Ideal for workshops and competent DIY mechanics, this module restores automatic engine stop/start capability, improves driveability in urban traffic and ensures the Start‑Stop system operates reliably under changing electrical loads. The unit is frequently searched by product numbers 9678342280 and 9678292180, so use these references when diagnosing or ordering replacement parts.
Key Features And Benefits
High‑quality electrical control for Start‑Stop function: manages power transfer and switching events to allow smooth engine restarts and to prevent undue battery drain. Compatible with original vehicle communication networks (CAN). Direct replacement for the listed product codes reduces diagnostic time and helps restore factory functionality quickly.
Typical Symptoms Of A Faulty Unit
- Start‑Stop Unavailable Message Or Indicator Light On Dashboard.
- Vehicle Fails To Restart Automatically After Engine Stop.
- Intermittent Start‑Stop Operation Or System Disabled Without Clear Reason.
- Related DTCs (Diagnostic Trouble Codes) Stored In Engine Or Body Control Modules.
- Irregular Battery Charging Or Unexpected Battery Drain.
Replacement And Installation Guide
Before any work, always disconnect the vehicle battery and follow the vehicle manufacturer’s safety procedures to avoid electrical damage. Typical replacement steps:
- Disconnect Battery Negative Terminal.
- Access The Unit (location varies by model—usually in the engine bay or near the battery/alternator area) and Remove Any Protective Covers.
- Unplug Electrical Connectors And Remove Fasteners Holding The Unit.
- Fit The New Unit, Secure Fasteners To Specified Torque, And Reconnect Connectors.
- Reconnect Battery, Perform Any Required Initialization Or Coding, And Clear Stored Fault Codes.
Some replacements require initialization or coding to fully integrate the unit with vehicle electronics. If the Start‑Stop function does not return after installation, professional diagnostic equipment may be needed to complete configuration and to clear stored faults.
Installation Recommendations
- Always Disconnect The Battery Before Removal Or Installation To Prevent Short Circuits And Unit Damage.
- Inspect Connectors For Corrosion, Bent Pins Or Water Ingress; Clean Or Replace As Necessary.
- Secure Wiring Harnesses And Ensure Proper Gasketing/Sealing Against Moisture If The Unit Is Located In The Engine Bay.
- Use Manufacturer Specified Torque Values For Fastening To Avoid Mechanical Stress On The Housing.
- If In Doubt, Have Coding/Initialization Performed With A PSA‑Compatible Diagnostic Tool.
Most Common Failure Causes
- Heat And Vibration Leading To Electronic Component Fatigue (Capacitors, Power Transistors).
- Water Ingress Or Corrosion Of Electrical Connectors.
- Electrical Surges Or Poor Battery/Charging System Condition Causing Overstress.
- Poor Grounding Or Damaged Wiring Causing Intermittent Operation.
- Long Service Life And High Mileage—components May Degrade After Several Years/Many Cycles.
Technical Information
- Manufacturer: Continental
- Model: Start‑Stop Inverter Unit
- Product Codes: 9678342280, 9678292180
- Other Numbers: 9678342280-00, 9678292180-00, 9678273280, 9805721280
- Typical Fitment (Examples): Citroën Berlingo B9, Citroën C4, Citroën C4 Picasso, Peugeot 208, Peugeot 308, Peugeot Partner III
This replacement unit is aimed at professional workshops and experienced DIY mechanics who are familiar with automotive electrical systems. Proper diagnosis before replacement is recommended to ensure the Start‑Stop inverter is the root cause of the fault, and to avoid unnecessary interventions.
Order using the product codes listed above to find the correct unit quickly and reduce vehicle downtime.
