T8 / P0102 00
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Cruise control not working.
Limp home
Mass Air Flow Circuit. Low Input.
Fault symptom
Fault indicator lamp (for further information see WIS Fault diagnosis, general)
Cruise control not working.
Limp home
On-board diagnosis
Type of diagnosis:
Enable criteria:
| Battery voltage must be between 11 - 16 V. |
Fault criteria:
| Short-circuit to ground/+B or open-circuit results in 0 Hz on the input. |
| (Low frequency results in high flow, e.g. open-circuit 230 g/s) |
Dependent:
System reaction to a fault:
| The system continues to function with a calculated air mass instead of the value from the mass air flow sensor. |
| Boost pressure adaption is blocked and reset. |
| Limited acceleration and idle function. |
| Secondary air switched off. |
OK report:
| Fault criteria NOT fulfilled for 2 s. |
Fault handling:
| (See section Fault handling III, "Other emission-related components and functions" for more information.) |
Checking the wiring harness
Move the wiring harness at several spots and in several directions to reveal intermittent breaks and short-circuits. Check switches, connectors and crimp connections for oxidation, retracted pins and pin clamping force.
Diagnostic help
Diagnosis regards:
| Electrical fault in connecting leads or component. |
Functions in the diagnostic tool related to the fault:
| (See also description of readings/activations in diagnostic tool) |
