Input Signals
Sensors and functions which are different to previous types are marked in bold text .
| Number | Component | Signal type/explanation |
|---|---|---|
| 3/1 | Ignition switch +50 supply | Provides early information to the Engine Control Module (ECM) to prepare for start. |
| 3/9 | Stop (brake) lamp switch | Informs the Engine Control Module (ECM) that the car is braking. The signal is a safety feature in addition to the brake pedal sensor. The Engine Control Module (ECM) carries out a range test between the signals from both sources. |
| 7/6 | Oil pressure switch | Provides information about engine oil pressure. The information is sent to the DIM which informs the driver, via the display, to stop the engine and/or check the oil level. |
| 7/8 | A/C pressure sensor (linear) | Provides information using a linear signal about any pressure changes on the high-pressure side. Depending on the pressure the Engine Control Module (ECM) can activate the engine cooling fan (FC) at high/low speed and shut off the A/C compressor. |
| 7/15 | Front heated oxygen sensor (HO2S) 1, (linear signal) | New signal characteristics. provides information about the oxygen level in the exhaust gases upstream of the catalytic converter after combustion. |
| 7/16 | Engine coolant temperature sensor | Provides information about engine coolant temperature (ECT) temperature. New location at the front of the engine inside the timing cover. |
| 7/17 | Mass air flow (MAF) sensor (heated film principle) | Provides information about the intake air mass. The Mass air flow (MAF) sensor for turbocharged engines has no resistor for the intake air temperature and is complemented instead by a separate sensor 7/77 upstream of the charge air cooler (CAC). |
| 7/21 | Camshaft position (CMP) sensor | New signal characteristic . Provides information about the cylinders intake and compression phases.Gives shorter starting time, approximately 0.5 seconds. |
| 7/23 7/24 |
Knock sensor (KS), 1 Knock sensor (KS), 2 |
Provides information if the engine knocks. |
| 7/25 | Engine speed (RPM)/position sensor | Provides information about the crankshaft position and engine speed (RPM). Has flywheel adaptation for mechanical wear/damage. Like M4.4 |
| 7/51 | Accelerator pedal (AP) position sensor | Provides information about accelerator pedal (AP) position.The signal is sent via two separate cables at the same time, one analog signal and one digital signal. |
| 7/73 | Engine coolant level switch | Provides information about engine coolant level. The information is sent to the DIM which uses the display to inform the driver to stop the engine and/or check the oil level. |
| 7/77 | Intake air temperature sensor | Provides information about the intake air actual temperature after the charge air cooler (CAC). Used for boost pressure control. The sensor is used together with intake air pressure sensor 7/81. Turbocharged engines only. |
| 7/81 | Intake air pressure sensor | Provides information about the intake air actual pressure after charge air cooler (CAC). The most important sensor for boost pressure control. The sensor is used together with intake air pressure sensor 7/77. Turbochargers only. |
| 7/82 | Rear heated oxygen sensor (HO2S) 2 | Provides information about the oxygen level downstream of the catalytic converter (TWC).Compared to previous versions it operates faster and can also affect the fuel/air mix to a greater extent. |
| 7/84 | Fuel tank pressure sensor | Provides information about pressure changes in the fuel tank system. Used for leak diagnostic. |
| 7/103 | Front heated oxygen sensor (HO2S) 3, (linear signal) | New signal characteristics. Provides information about the oxygen level in the exhaust gases upstream of the catalytic converter.(Only 6 cylinder engines) |
| 7/104 | λ heated oxygen sensor (HO2S) 4, rear | Provides information about the oxygen level downstream of the catalytic converter (TWC).Compared to previous versions it operates faster and can also affect the fuel/air mix to a greater extent. (Only 6 cylinder engines) |
| 7/105 | Ambient air temperature sensor located in the left door mirror | Provides information about ambient air temperature. Affects control of the engine cooling fan (FC). |
| 7/123 | Clutch pedal position sensor | Provides information that the clutch pedal is depressed. The signal is used to disconnect the cruise control.Used in certain markets to connect the so called Interlock function via VGLA which inhibits the starter motor. |
| 7/124 | Brake pedal sensor (located in the brake servo) | Provides information that the brake pedal is depressed and how much it is depressed by. In case of serious faults in the Electronic Throttle System the engine idles when the brake pedal is depressed. The signal is used to disconnect the cruise control. |
| CAN | CAN communication | Exchange of information between the Engine Control Module (ECM) and the following units: ABS, TCM, CCM, CDM, ETM and DLC. |