AD07.61-P-6000-04B | Hot-film mass air flow sensor - ME-SFI gasoline injection system - Testing electrical system |
| Scope of test | Tester/test connection | Operation/ Prerequisite: | Specified value | Possible cause/ Remedy | ||
1.0 | Hot-film mass air flow sensor (B2/5) Hot film signal |
104 (48E) |
N3/10 |
103 (47E) | Ignition: ON Engine: idling Coolant temperature > 70° C | 0.9-1.1 V 1.3-1.7 V Increasing rotational speed, increasing voltage | 1.1 1.2 1.3 Cable Air leak B2/5 |
1.1 | Voltage supply 5 V |
N3/10 104 (48E) |
|
B2/5 4 | Disconnect coupling at hot-film mass air flow sensor (B2/5) and check directly at socket 4 (brown/yellow). Ignition: ON |
4.7-5.2 V | Cable N3/10 |
1.2 | Ground lead for hot-film mass air flow sensor (B2/5) |
B2/5 3 |
|
N3/10 102 (46E) | Disconnect coupling at hot-film mass air flow sensor (B2/5) and check directly at socket 3 (brown). Ignition: ON |
4.7-5.2 V | Cable |
1.3 | Voltage supply 12 V |
N3/10 104 (48E) |
|
B2/5 2 | Disconnect coupling at hot-film mass air flow sensor (B2/5) and connect positive from voltmeter at socket 2 (red/blue). Ignition: ON |
11-14 V | Cable Fuse and relay module, basic module (K40, K40/4, F1f11 or N16/1) |