Description
Supply Cable to the Start-Stop Capacitor for e-HDi Engines.
This supply cable, listed under part number 9688166980, is used on Stellantis Start-Stop systems fitted to e-HDi/1.6 HDi diesel engines. It connects the Start-Stop capacitor to the vehicle electrical network and is often searched for by its product code (9688166980). The cable plays a key role in energy transfer during stop/start events and in maintaining reliable restart performance.
Technical Information
- Manufacturer: Stellantis (Peugeot / Citroën)
- Model: Peugeot 508, Citroën C5 X7 (e-HDi / 1.6 HDi engines)
- Product Codes: 9688166980
- Other Numbers: Not specified
Function And Application
The cable links the Start-Stop capacitor (auxiliary energy storage) to the vehicle electrical system, allowing rapid delivery of current required for instant engine restarts. In micro-hybrid e-HDi systems the capacitor supplements the battery during restart pulses, reducing battery stress and improving system responsiveness.
Common Failure Causes
- Corrosion At Connectors: Exposure to moisture leads to increased resistance and intermittent contact.
- Heat And Vibration: Prolonged engine bay heat and mechanical vibration can damage insulation or cause conductor fatigue.
- Physical Damage Or Abrasion: Incorrect routing or contact with moving parts can wear the cable sheath or break the conductor.
- Poor Electrical Contact: Loose terminals or contaminated contacts produce voltage drops that disable Start-Stop operation.
Replacement Interval And Symptoms
There is no fixed service interval for this cable. Replace it when you observe symptoms such as Start-Stop system disabled, diagnostic faults related to Start-Stop or energy storage, slow or failed engine restarts, visible damage to the cable or connectors, or high resistance measured across the connection.
Installation Recommendations
- Always disconnect the vehicle battery before starting work to avoid short circuits or damage to electrical components.
- Locate the Start-Stop capacitor and follow the original cable routing. Note clips and mounting points for correct reassembly.
- Remove the old cable by releasing connectors and fasteners; inspect connectors and mating terminals for corrosion or damage.
- Fit the replacement cable (9688166980) ensuring secure, tight connections and correct routing to prevent chafing. Use original mounting clips or equivalent fasteners.
- Where appropriate, apply suitable dielectric grease to electrical contacts to discourage corrosion.
- After installation, reconnect the battery and verify Start-Stop function. Clear any related fault codes with diagnostic equipment and confirm normal system operation.
Search Tips
This part is frequently searched by its product code 9688166980 and by vehicle models Peugeot 508 and Citroën C5 X7. Including the part number and engine type (e-HDi / 1.6 HDi) in searches will improve results when sourcing the correct cable.
