Simtec 56.0/ 56.1 F2:TROUBLE CODE TABLE
| Trouble Code | Information Sensor Cause of Fault | Remedy in F0:DATA LIST No. | Trouble Code Storage when ... |
|---|---|---|---|
| 74 | MASS AIR FLOW SENSOR VOLTAGE HIGH | 09 | · Engine speed higher than 672 rpm |
· Mass air flow meter signal higher than 505 kg/ h (short circuit to voltage)
· Conditions must be fulfilled for at least 3 s
Replacement values:
· Trouble codes 21 and 22 not recognised:
The control unit calculates with an air mass computed internally from the engine speed and the throttle valve angle
· Trouble code 21 or 22 recognised:
The control unit calculates with an air mass resulting from the engine speed
Effects:
· With the exception of throttle valve adaptation, all adaptation is blocked
· Tank vent valve regulation is blocked
If trouble codes 21 or 22 were recognised:
· Oxygen sensor regulation is blocked
Note:
| In case of a fault, the system immediately switches to emergency operation. |