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, Engine Control Module (ECM)
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.
Numbers in parenthesis indicate to which pin of the component the value corresponds.
| Designation | Type | Supply voltage | Value | Miscellaneous |
| Air conditioning (A/C) relay | Mechanical relay | 12 V | 92 Ω ± 10 % at 23 °C | |
| System relay Starter relay |
Mechanical relay | 12 V | 82 Ω ± 10 % at 23 °C (coil) | |
| Battery Relay | Mechanical relay | 12 V | 43 Ω ± 10 % 23 °C (coil) | |
| A/C pressure sensor | Absolute pressure sensor | 5 V (#3) | Air conditioning (A/C) high pressure | |
| Brake light switch | Position switch | 12 V (#1) | The switch is closed when the pedal is depressed (terminals #1 - #5) | |
| Intake pressure sensor | 5 V (#3) | |||
| Fuel temperature sensor | NTC resistor | 5 V (#3) | 2500 Ω ± 6 % at 20 °C (#1 - #2) | Integrated in the fuel pressure sensor |
| Fuel pressure sensor | Piezo resistive pressure sensor | 5 V (#3) | ||
| Engine cooling fan (FC) control module | - | 12 V (#2) | ||
| Evaporative emission system (EVAP) valve | Electromagnetic valve | 12 V (#1) | 20.5 Ω ± 1.5 Ω | |
| Relief valve | Electromagnetic valve | 12 V | Coil 13.3 Ω | Off/On function |
| Accelerator pedal (AP) position sensor | Electronic pedal sensor with two output signals, PWM and a linear analog signal | 12 V (#1) power supply digital position sensor 5 V (#6) Power supply analog position sensor |
Only certain versions also have the analogue signals | |
| Throttle unit | Electronic throttle module (ETM) with two integrated potentiometers and a throttle motor | 5 V (#5) | 1.2Ω (#1-#2 motor winding) at normal operating temperature. | - |
| Fuel injector | Electromagnetic injector valve | 12 V (#2) | Approximately 12 Ω at 20 °C (#1 - #2) | |
| Camshaft position (CMP) sensor | Magneto-resistive sensor | 5 V (#1) | ||
| Knock sensor (KS) | Piezo electric component | Greater than 1 MΩ at 25 ± 10 °C (#1-#2) | ||
| Oil level and oil temperature sensor | 12 V (#1) | An oscilloscope must be used to detect changes in the oil level if a defective sensor is suspected. This is because the signals are based on a series of pulses consisting of temperature, level and quality. | ||
| Ignition coil | 12 V (#1) | Approximately 0.73 Ω (primary winding) | ||
| Preheating, front heated oxygen sensor | PTC resistor | 12 V (#3) | 2.18 - 2.68 Ω at 20 °C (#1 - #2) | |
| Preheating, rear heated oxygen sensor (HO2S) | PTC resistor | 12 V (#1) | Approx. 13 Ω ± 1, 3 Ω (#1 - #2) | |
| Leak diagnostic unit | Consists of pump, electromagnetic valve and an internal heating element (PTC resistor) | 12 V (#4) | 118Ω (#1-#4 pump motor winding) 29.5 Ω ± 10% (terminals #3-#4 Valve coil) 30Ω (#2-#4 Heating element) |
|
| 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) |
|
| Reset valve camshaft | Electromagnetic valve | 12 V (#1) | 7.4 Ω ± 0.5 Ω at 20 °C (#1-#2) | |
| Engine speed (RPM) sensor | Hall sensor | 5 V (#3) | - | - |
| Outside temperature sensor | NTC resistor | 5 V (#1) | 18702 Ω at -20 °C 6318 Ω at 0 °C 2424 Ω at 20 °C 1034 Ω at 40 °C (#2 - #3) |
|
| Charge pressure sensor | Piezo-resistive pressure sensor (pressure) NTC sensor (temperature) |
5V | 2.5 kΩ at 20 °C (temp) Max pressure 500 kPa |
|
| Turbocharger (TC) control valve | Electromagnetic valve | 12 V | Coil 23 ± 1.2 Ω Current consumption 0.72 A at 12 V -40 °C and 100 % deployment. |
Adjustable 0 - 100 % (duty cycle) |
| Brake vacuum sensor | Piezo-resistive pressure sensor (pressure) | 5 V | -100 kPa = 4.5 V 0 kPa = 0.5 V |
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.