AD07.61-P-6000-04C | Hot film air mass sensor - check electrics - ME-SFI fuel injection 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: At idle speed: Coolant temperature > 70 °C | 0.9 - 1.1 V 1.3 - 1.7 V (increasing rpm, increasing voltage) | 1.1 1.2 1.3 Line Unmetered air B2/5 |
1.1 | Voltage supply | N3/10 104 (48E) |
|
B2/5 4 | Unplug coupling on hot film air mass sensor (B2/5) and check directly at socket 4 brown/yellow (br/ge) Ignition: ON | 4.7 - 5.2 V | Line N3/10 |
1.2 | Ground lead for hot film air mass sensor (B2/5) |
B2/5 3 |
| N3/10 102 (46E) | Unplug coupling on hot film air mass sensor (B2/5) and check directly at socket 3 brown (br) Ignition: ON | 4.7 - 5.2 V | Line |
1.3 | Voltage supply | N3/10 104 (48E) |
|
B2/5 2 (2) | Unplug coupling at hot film air mass sensor (B2/5) and connect positive end of voltmeter to socket 2 red/blue (rt/bl) Ignition: ON | 11 - 14 V | Line Models 129 and 140 Base module (N16/1) or fuse in base module Model 202 Fuse and relay module (K40/4) Model 210 Relay module (K40) |