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

> The sensors and actuators of the 1.6 TDI common rail engine management around engine control unit J623.

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

## Sensors

- **G28** Engine speed sender
- **G40** Hall sender
- **G79** Accelerator position sender
- **G185** Accelerator position sender 2
- **G70** Air mass meter
- **G62** Coolant temperature sender
- **G83** Radiator outlet coolant temperature sender
- **G31** Charge air pressure sender
- **G42** Intake air temperature sender
- **G81** Fuel temperature sender
- **G247** Fuel pressure sender
- **G212** Exhaust gas recirculation potentiometer
- **G39** Lambda probe
- **G450** Exhaust gas pressure sensor 1
- **G235** Exhaust gas temperature sender 1
- **G495** Exhaust gas temperature sender 3
- **G648** Exhaust gas temperature sender 4
- **F** Brake light switch
- **G476** Clutch position sender
- **G581** Position sender for charge pressure positioner
- **G336** Intake manifold flap potentiometer\*
- **G69** Throttle valve potentiometer
- **G266** Oil level and oil temperature sender

## Actuators

- **J17** Fuel pump relay
- **G6** Fuel system pressurisation pump
- **N30** Injector, cylinder 1
- **N31** Injector, cylinder 2
- **N32** Injector, cylinder 3
- **N33** Injector, cylinder 4
- **N290** Fuel metering valve
- **N276** Fuel pressure regulating valve
- **N75** Charge pressure control solenoid valve
- **V157** Intake manifold flap motor\*
- **J338** Throttle valve module
- **N18** Exhaust gas recirculation valve
- **N345** Exhaust gas recirculation cooler change-over valve
- **V178** Coolant circulation pump 2
- **Z19** Lambda probe heater
- **J179** Automatic glow period control unit
- **Q10** Glow plug 1
- **Q11** Glow plug 2
- **Q12** Glow plug 3
- **Q13** Glow plug 4

\* No function at present

![Actuators](https://catalog.polo.blue/instructions/ssp-442/cd837744d126beeb.webp)