Description
Supply Cable To The START-STOP Capacitor For E-HDi Engines
This supply cable is a direct replacement option for the Start-Stop capacitor circuits used on PSA e-HDi diesel engines. Designed for reliable conduction between the capacitor module and vehicle electrical system, the cable supports rapid engine restarts and stabilizes voltage peaks during Start-Stop events. Commonly searched by OEM references 9672726880 and 5638NY, this part is suitable for professional workshops and experienced DIY mechanics working on Citroën and Peugeot vehicles.
Function And Application
The cable transmits current between the Start-Stop capacitor and the main electrical system, ensuring the capacitor can quickly supply energy for restart events and absorb transient voltages. Proper connection and low-resistance contacts are critical for Start-Stop functionality. This cable is intended for vehicles equipped with the e-HDi Start-Stop system, where quick, repeatable restarts are required to reduce fuel consumption and emissions in urban driving.
Replacement Procedure (Overview)
Replacement should be performed by a competent technician or an experienced DIYer with basic electrical skills. Typical steps:
- Disconnect The Negative Terminal Of The Battery Before Starting Work.
- Locate The Capacitor Module And Trace The Existing Cable Routing. The Capacitor Is Usually Positioned In The Engine Bay Close To The Battery Or Electrical Distribution Areas.
- Remove Protective Covers And Any Retaining Clips Securing The Cable.
- Disconnect Connectors Or Terminals From Both Ends, Noting Their Orientation And Any Seals.
- Install The New Cable Following The Original Routing, Secure With Clips, And Ensure Connectors Are Fully Seated.
- Reconnect The Battery And Verify Start-Stop Operation And Charging System Voltage Under Load.
Why This Part Fails Most Often
Common failure causes include Connector Corrosion From Moisture, Mechanical Damage Due To Chafing Or Vibration, Heat-Related Insulation Degradation, And Poor Contact Caused By Loose Or Worn Terminals. Failures Often Present As Intermittent Or Complete Loss Of Start-Stop Function, Voltage Drop At The Capacitor, Or Warning Messages Related To The Charging/Start-Stop System. Regular Inspection During Routine Service Intervals Helps Detect Early Signs Of Wear.
Installation Recommendations
Always Use Correct Tools And Replace Any Damaged Clips Or Seals To Maintain Water And Corrosion Resistance. Ensure All Connections Are Clean And Tight To Minimize Contact Resistance. After Installation, Perform A Functional Test Of The Start-Stop System And Check For Fault Codes With Suitable Diagnostic Equipment.
Technical Information
- Manufacturer: Stellantis (Citroën/Peugeot)
- Model: Citroën C4; Citroën C4 Picasso; Peugeot 308
- Product Codes: 9672726880
- Other Numbers: 5638NY
Perfect For Workshops And Skilled DIY Mechanics Searching By Part Number. Installation Improves Start-Stop Reliability And Ensures Stable Electrical Performance During Repeated Engine Restarts.
