Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Component Specifications
The component specification gives the value of the component when the connector is disconnected. Where no value is given, it is not possible to measure a relevant value at the component.
The figure within the brackets indicates the terminal pin on the component to which the value refers.
| Designation | Type | Supply voltage | Value | Miscellaneous |
| Air conditioning (A/C) relay | Mechanical relay | 12V (#1) | Approximately 70 Ω (coil) | |
| A/C pressure sensor | Absolute pressure sensor | 5 V (#3) | - | |
| Air conditioning (A/C) pressure switch | Pressure switch (Pressostat) | 12 V (#2) | 0 Ω at air conditioning (A/C) off | - |
| Brake lamp switch | Position switch | 12 V (#1) | The switch is closed when the pedal is depressed (#1-#2) | |
| Fuel temperature sensor | NTC resistor | 5V (#3) | 5896 Ω at 0 °C 3792 Ω at 10 °C 2500Ω at 20 °C 1707Ω at 30 °C 1175 Ω at 40 °C (#1-#2) |
Integrated in the fuel pressure sensor |
| Fuel pressure sensor | Piezoresistive pressure sensor | 5V (#3) | - | |
| Engine cooling fan (FC) control module | - | 12 V (#2) | - | |
| Evaporative emission system (EVAP) valve | Electromagnetic valve | 12 V (#1) | 17-24 Ω at 20 °C (#1-#2) | |
| Accelerator pedal (AP) position sensor | Electronic pedal sensor with two output signals, PWM and a linear analog signal | 5 V (#1) 12 V (#6) | - | |
| Throttle unit | Electronic throttle control module with two integrated potentiometers and a damper motor | 5 V (#3) | 1.2-3.5 Ω (terminals #1-#4 motor winding). 1000-1500 Ω (terminals #2-#3 Parallel connection of potentiometers 1 and 2). Approximately 820 Ω when the throttle is closed. Approximately 1580 Ω at wide open throttle (terminals #2-#6 potentiometer 1). Approximately 1480 Ω when the throttle is closed. Approximately 500 Ω at wide open throttle (terminals #2-#5 potentiometer 2) |
- |
| Fuel injector | Electromagnetic injector valve | 12 V (#1) | Approximately 12 Ω at 20 °C (terminal #1-#2) | |
| Camshaft position (CMP) sensor | Magneto-resistive sensor | 5 V (#1) | - | |
| Knock sensor (KS) | Piezo electric component | - | Greater than 1 MΩ (terminal #1-#2 front knock sensor (KS). Greater than 1 MΩ (terminals #3-#4 rear knock sensor (KS) |
Separate signal ground for the knock sensors (KS) |
| Clutch pedal switch | Position switch | 12 V (#1), ground terminal (#2) | - | Closed at 75% pressed down. |
| Charge pressure sensor | Absolute pressure sensor | 5 V (#3) | - | |
| Preheating front heated oxygen sensor (HO2S) | PTC resistor | 12 V (#3) | 2.6-3.4 Ω at 20 °C (#3-#4) | |
| Preheating, rear heated oxygen sensor (HO2S) | PTC resistor | 12 V (#1) | Approximately 9 Ω at 20 °C (#1-#2) | |
| Mass air flow (MAF) sensor | - | 12 V (#2) 5 V (#4) |
- | |
| Air temperature sensor, intake | NTC resistor | 5 V (#3) | 5886 Ω at 0 °C 3791 Ω at 10 °C 2510 Ω at 20 °C 1715 Ω 30 °C (#1-#2) |
Integrated in the boost pressure sensor |
| Leak diagnostic unit | Consists of an air pump, an electromagnetic valve and an internal heating element (PTC resistor) | 12 V (#4) | Approximately 118 Ω (terminals #1-#4 pump motor winding) 27.9 -34.1 Ω (terminals #3-#4 Valve coil) |
|
| Engine coolant temperature (ECT) sensor | NTC resistor | 5 V (#1) | 15040 Ω at -20 °C 2450 Ω at 20 °C 318 Ω at 80 °C (#1- #2) |
|
| Oil pressure switch | Pressure switch (Pressostat) | 12 V (#1) | Grounded in the cylinder block. Closed switch when the oil pressure is low | |
| Camshaft reset valve | Electromagnetic valve | 12 V (#1) | 3-5 Ω (#1-#2) | |
| Flywheel sensor | Engine speed sensor | - | 125Ω (+/- 17 Ω) at 20 °C (#1-#2) | |
| System relay | Mechanical relay | 12V (#1) | Approximately 80 Ω (coil) | |
| Starter relay | Mechanical relay | 12V (#1) | Approximately 80 Ω (coil) | |
| Turbocharger (TC) control valve | Electromagnetic valve (3 way) | 12 V (#1) | 23 Ω (+/- 1, 2 Ω) at 20 °C (#1-#2) |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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