Computer diagnostics of the M50B20 Vanos engine, DME Siemens MS40.1 on BMW E34

MS40.1 (M50B20 Vanos) ECU identification dаta: Siemens hardware 6577014006f / software 6577015014, generation 000020MS40, date 42/95

ECU Identification

MS40.1 Siemens with Vanos system of the M50B20 engine

53 Lambda sensor heater

68 Hot-film air flow meter

206 VANOS mechanical elements

MS40.1 DME fault codes: 53 - lambda sensor heater, 68 - air flow meter, 206 - VANOS mechanical elements

18 Engine speed: 736 RPM

90 Ignition advance angle: 3.7° BTDC

68 Air flow meter signal: 14.5 kg/h

114 Injection signal cylinder #1: 4.5 ms

85 Intake air temperature: 47 °C

81 Engine temperature: 84 °C

53 Lambda sensor heater: 2 %

91 Lambda mixture control: OFF

73 Lambda sensor voltage: 0.09 V

MS40.1 main parameters: RPM 736, ignition 3.7°, air flow 14.5 kg/h, injection 4.5 ms, engine temp 84°C

77 Throttle position: 0.60 V | idle | 0° opening angle

97 Knock control system: OFF

98 Acceleration enrichment: OFF

MS40.1 parameters: throttle position 0.6V (idle), knock control off, acceleration enrichment off

51 Fuel tank ventilation: OFF

89 ECU supply voltage: 13.5 V

12 Vehicle speed: 0 km/h

62 Ignition feedback signal: OK

69 Air flow meter ground connection: OK

MS40.1 diagnostic signals: tank ventilation off, supply 13.5V, speed 0 km/h, ignition and AFM ground check

111 A/C compressor shut-off (during acceleration): OFF

9 A/C compressor: not activated

10 Air conditioning: OFF

14 Ignition timing intervention: not active

8 Transmission selector position: P/N

MS40.1 auxiliary systems: A/C, compressor shut-off, ignition intervention, selector position P/N