12684225
BOSCH 12684225 Injecteur Haute Pression Chevy Malibu Equinox Buick 1.5L SGE
12668393, 12692283, 0261500624, 0261500625Fast-Actuating Solenoid Multi-Hole Direct Injection Nozzle-200 barSpécifications techniques
| Spécification | Valeur |
|---|---|
| Type de système | Bosch HDEV5.2 Multi-Hole Direct Gasoline Fuel Injector |
| Pression de serviceSpéc. clé | |
| Spray Pattern | Optimized 6-orifice pattern for central combustion ignition |
| Fuel Rail Bolt Torque | 12 N·m (bracket clamping fasteners) |
| High Pressure Pipe Torque | 28 N·m Flare Nut Connection |
| Coil Resistance | 1.5 - 1.9 Ω at 20°C (Direct pulse solenoid control) |
| Codes défauts fréquents | P0300 (Random Misfire), P0301-P0304 (Cylinder Misfire), P0171 (System Lean Bank 1) |
| Workshop Precaution | Install brand-new Teflon combustion seals using EN-48266 seal expander tool |
Pompe haute pression associée (Ensemble circuit de carburant)
Fonctionne sur le même circuit haute pression Common Rail. En cas de chute de pression (P0087), vérifier le débit de la pompe avant de remplacer les injecteurs.
Conseils de montage
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Remove Intake Duct",
- "instruction": "Depressurize fuel system by removing fuel pump fuse and running engine until shutdown. Disconnect battery negative cable."
- },
- {
- "step": 2,
- "title": "Disconnect Fuel Rail Wire Connectors & Retainers",
- "instruction": "Disconnect injector electrical pigtails. Disconnect fuel feed pipe (28 N·m) and remove fuel rail retaining bolts (12 N·m)."
- },
- {
- "step": 3,
- "title": "Extract Injectors & Renew Teflon Tip Seals",
- "instruction": "Carefully remove injectors from cylinder head bore using EN-47218 remover. Install new Teflon seals and size with calibration sleeve."
- },
- {
- "step": 4,
- "title": "Install Fuel Rail, Torque Bolts & Leak Check",
- "instruction": "Press injectors into cylinder head. Tighten rail bolts to 12 N·m. Torque fuel line nut to 28 N·m. Reconnect battery, prime system and inspect for leaks."
- }
- ]
Codes de Defaut (DTC) & Protocoles de Diagnostic
Codes de defaut diagnostiques (DTC) courants déclenchés lorsque cet injecteur common rail subit une usure, des pannes de circuit ou une dérive d'étalonnage:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Protocoles Techniques de Diagnostic & Réparation
Procédures d'atelier vérifiées, seuils de test et guides d'intervention pour cet ensemble.