HITACHI
03C127026R
Voir les spéc.
SolenoidHitachi / Bosch FSI/TSI 150-bar High Pressure Direct InjectionEuro 45
HITACHI 03C127026R Pompe Haute Pression VW Golf 6 Tiguan 1.4 TSI
RÉFÉRENCE OE
03C127026P, 03C127026M, 03C127026J, HPP0005, HM10018SOUPAPE DE COMMANDE
Integrated Fuel Metering Valve N290NEZ D'INJECTEUR
-PRESSION DE SERVICE
150 barNORME ANTIPOLLUTIONEuro 4 / Euro 5
GARANTIE12 Mois
02
Compatibilité véhicules et motorisations
| Véhicule | Moteur | Années |
|---|---|---|
| Volkswagen Golf Mk5 / Mk6 / Scirocco / Tiguan | Volkswagen 1.4L TSI DOHC 16V Twincharger / Turbo EA111 (CAXA / CAVE / CAVD / CTHD / BLG / BMY) | 2006-2015 |
| Audi A1 8X / A3 8P | Volkswagen 1.4L TSI DOHC 16V Twincharger / Turbo EA111 (CAXA / CAVE / CAVD / CTHD / BLG / BMY) | 2007-2014 |
03
Spécifications techniques
| Spécification | Valeur |
|---|---|
| Pression de serviceSpéc. clé | |
| Pump Technology | Single Plunger Mechanical Camshaft-Driven HPFP |
| Flow Control | Integrated Solenoid Metering Valve (N290) |
| Mounting Flange Torque | 20 N·m |
| High Pressure Line Torque | 27 N·m |
| Drive Type | Intake Camshaft Driven with Roller Tappet |
| Fuel Type | Gasoline / Petrol Direct Injection (TSI / TFSI / Twincharger) |
| OE Cross References | 03C127026R, 03C127026P, 03C127026M, 03C127026J, HPP0005 |
| Failure Symptoms | EPC warning lamp on acceleration, P0087 low rail pressure, hard starting, limp mode above 3000 RPM |
| Diagnostic Test | VCDS measuring block Group 106 & 140 (Specified vs Actual Rail Pressure under boost) |
04
Conseils de montage
- [
- "Disconnect battery; pull fuel pump fuse and crank engine for 5 seconds to depressurize fuel lines.",
- "Disconnect electrical connector to N290 metering valve and unfasten low-pressure feed hose clamp.",
- "Counter-hold pump discharge union and loosen high-pressure steel tube flare nut using a flare wrench.",
- "Loosen the two M6 mounting bolts evenly in alternating turns to release internal spring tension evenly.",
- "Withdraw HPFP and inspect roller tappet in the cylinder head bore for flat spots or surface galling.",
- "Fit a new sealing O-ring lubricated with clean engine oil; seat pump into mounting bore.",
- "Tighten mounting flange bolts progressively in alternating steps to 20 N·m.",
- "Hand-thread high-pressure line flare nut until seated, then torque to 27 N·m; reconnect N290 connector.",
- "Cycle ignition several times to bleed air; start engine and inspect all joints for leaks."
- ]
05
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:
P0087Critical
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
P0201 - P0208High
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.
P0300 / P0301+High
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
P0088High
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
PROTOCOLES D'ATELIER
Protocoles Techniques de Diagnostic & Réparation
Procédures d'atelier vérifiées, seuils de test et guides d'intervention pour cet ensemble.
DIAGNOSTIC COMMON RAIL D
Lire le protocole techniqueDiagnostic Pompe Haute Pression: Code P0087 & Bosch CP4
DIAGNOSTIC COMMON RAIL D
Lire le protocole techniqueDiagnostic Régulateur Débit IMV SCV & Test P0088 CR
PROTOCOLE DE DIAGNOSTIC OBD-II
Lire le protocole techniqueGuide de diagnostic P0087 : Pression de rampe trop basse
DIAGNOSTIC TECHNIQUE COMMON RAIL
Lire le protocole technique