Flow Too High
Flow too high
Checking the component and wiring
Check signal cable for an open-circuit and short-circuit to supply voltage.
Take readings between:
- Engine Control Module (ECM) #A63 (#B3) and mass air flow sensor #5.
Check the ground lead. Check for an open-circuit.
Take readings between:
- Engine Control Module (ECM) #A61 (#B1) and mass air flow sensor #3.
Remedy as necessary.
Other information
- - Connecting the breakout box, B5254T7 Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification, B5254T7 Signal Specification, Engine Control Module (ECM)
- The air flow reading from the mass air flow (MAF) sensor must be 0 kg/h with the engine switched off and ignition on
- Mass air flow (MAF) sensor, B5254T7 Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
-------------------------------------------------
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
- Check that the value for the air flow is correct. The value must be approximately 0 kg/h with the engine switched off
- Start the engine. Read off the air flow. The value can vary between 12-20 kg/h at idle speed, depending on the engine temperature and load. The flow can be more than 20 kg/h for a cold engine
- Increase the engine speed (RPM). Check that the air flow increases with increased engine speed.
Is the value correct?
Yes - Troubleshooting procedure complete
No - Fault-tracing information
-------------------------------------------------
Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit Fault-Tracing
No - Attempt New Test
-------------------------------------------------