# Functional diagram – SSP 442 The 1.6ltr. TDI Engine with Common Rail Injection System

> The functional diagram of the 1.6 TDI common rail engine management, with its legend.

- Web page: https://catalog.polo.blue/self-study/ssp-442-16-tdi-common-rail-engine/functional-diagram/
- Original document (PDF): https://cdn.polo.blue/files/SSP442-1.6-TDI-CAYA-CAYB-CAYC-engine.pdf

![Functional diagram (S442\_200)](https://catalog.polo.blue/instructions/ssp-442/cd76c128e5a36bb2.webp)

- **A** Battery
- **G6** Fuel system pressurisation pump
- **G31** Charge air pressure sender
- **G39** Lambda probe
- **G42** Intake air temperature sender
- **G62** Coolant temperature sender
- **G70** Air mass meter
- **G81** Fuel temperature sender
- **G83** Radiator outlet coolant temperature sender
- **G235** Exhaust gas temperature sender 1
- **G336** Intake manifold flap potentiometer\*
- **G450** Exhaust gas pressure sensor 1
- **G495** Exhaust gas temperature sender 3
- **G581** Position sender for charge pressure positioner
- **G648** Exhaust gas temperature sender 4
- **J17** Fuel pump relay
- **J179** Automatic glow period control unit
- **J317** Voltage supply relay
- **J519** Onboard supply control unit
- **J623** Engine control unit
- **N30** Injector, cylinder 1
- **N31** Injector, cylinder 2
- **N32** Injector, cylinder 3
- **N33** Injector, cylinder 4
- **N276** Fuel pressure regulating valve
- **N290** Fuel metering valve

![Functional diagram (S442\_202)](https://catalog.polo.blue/instructions/ssp-442/5ce0547f95a012c2.webp)

- **Q10** Glow plug 1
- **Q11** Glow plug 2
- **Q12** Glow plug 3
- **Q13** Glow plug 4
- **S** Fuse
- **V157** Intake manifold flap motor\*
- **V178** Coolant circulation pump 2
- **Z19** Lambda probe heater

\* No function at present

![Functional diagram](https://catalog.polo.blue/instructions/ssp-442/f180de32c3a33b72.webp)

![Functional diagram (S442\_204)](https://catalog.polo.blue/instructions/ssp-442/01c9b3f5e087fdfc.webp)

- **F** Brake light switch
- **G28** Engine speed sender
- **G40** Hall sender
- **G69** Throttle valve potentiometer
- **G79** Accelerator position sender
- **G185** Accelerator position sender 2
- **G212** Exhaust gas recirculation potentiometer
- **G247** Fuel pressure sender
- **G476** Clutch position sender
- **J338** Throttle valve module
- **J623** Engine control unit
- **N18** Exhaust gas recirculation valve
- **N75** Charge pressure control solenoid valve
- **N345** Exhaust gas recirculation cooler change-over valve
- **K** Diagnostic connection
- **S** Fuse
- **1** CAN data bus
- **2** CAN data bus