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 Specification
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 number to the right of the voltage value indicates the terminal pin on the component to which the value refers.
| Description | Type | Supply Voltage | Value | Other |
| A/C-relay | Mechanical relay | 12V (#1) | Approximately 70 Ω (coil) | |
| A/C-pressure sensor | Absolute pressure sensor | 5 V (#3) | - | |
| A/C pressure switch | Pressure switch | 12 V (#2) | 0 Ω at A/C | - |
| Brake light switch | Position switch | 12 V (#1) | The switch is closed when the pedal is depressed(terminals#1-#2) | |
| Fuel temperature sensor | NTC-resistor | 5V (#3) | 2500Ω at 20° (#1-#2) |
Integrating the fuel pressure sensor |
| Fuel pressure sensor | Piezoresistive pressure sensor | 5V (#3) | - | |
| EVAP-valve | Electro- magnetic valve | 12 V (#1) | 17-24 Ω at 20°C (#1-#2) | |
| Accelerator pedal sensor | Electronic pedal sensor of tv output, PWM- and a linear analog signal | 12 V (#1) 5 V (#6) | - | |
| Throttle unit | Electronic throttle regulatory module with built-in TV potentiometers and an SPJ motor | Potentiometer: 5 V (#3) | - |
- |
| Fuel Injector | Electro- magnetic injection valve | 12 V (#1) | Approximately 12 Ω at 20°C (#1-#2) | |
| Camshaft sensor | Magnetic resistive sensor | 5 V (#1) | - | |
| Knock sensor | Piezoelectric component | - | - | Separate signal ground for knock sensor. |
| Preheating front oxygen sensor | PTC-resistor | Preheating: 12 V (#3) | 2, 6-3, 4 Ω at 20°C (#3-#4) | |
| Rear preheated oxygen sensor | PTC-resistor | Preheating: 12 V (#1) | Approximately 9 Ω at 20°C (#1-#2) | |
| Mass air flow sensor | - | 12 V (#2) 5 V (#4) |
- | |
| Air temperature sensor, inlet | NTC-resistor | 5 V (#1) | Approximately 2300 Ω at 20°C (#1-#2) |
Integrated mass air flow sensor |
| Leak diagnostic unit | The air pump, electomagnetic valve and a heating element (PTC-resistor) | 12 V (#4) | Approximately 118 Ω (terminals #1-#4 pump motor winding) 27, 9 -34, 1 Ω (#3-#4 Valve coil) |
Heating element for heating the air pump is controlled by CEM |
| Engine temperature 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 | 12 V (#1) | Socket in the engine block. Contact closed at low oil pressure | |
| Camshaft switching valve, inlet | Electro- magnetic valve | 12 V (#1) | 3-5 Ω (#1-#2) | |
| Flywheel sensor | Induction 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) | |
| Intake pressure sensor | Semiconductor | +5V (#3) | 10 Ω (#1-#2) |
Use the Manual With the Right Hardware
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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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