Flow Too High - Permanent Fault

ECM-1300 MASS AIR FLOW (MAF) SENSOR
FLOW TOO HIGH - PERMANENT FAULT

Checking cables



Check cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for a short-circuit to supply voltage according to [1][2]Checking Wiring and Terminals. Permanent Fault

Check ground lead between #A58 (#A58) and mass air flow (MAF) sensor #3 for an open-circuit according to [1][2]Checking Wiring and Terminals. Permanent Fault

Remedy as necessary

Other information:
- Connecting the breakout box/accessing the control module, Connecting the Breakout Box (ECM)
- To access/replace the Mass Air Flow (MAF) sensor, Mass Air Flow (MAF) Sensor, Replacing
- With the ignition on and mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor #2 should be approximately U(bat), mass air flow (MAF) sensor #3 should be ground and mass air flow (MAF) sensor #5 should be approximately 1 volt.
- For information about signals, see Diagnostic Parameters and Pinout Values. Signal Description, ME7, B5XX4T


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall connectors, components etc.
- Ignition on.
- Check that the air flow corresponds, the value should be approximately 0 kg/h (0 lb/h) with engine switched off.
- Start the engine and read off the air flow which should be approximately 14 kg/h (30.86 lb/h) when idling.
- Increase the engine speed (RPM) and check that the air flow increases with increased engine speed.

Do the values agree?
Yes - Testing Complete.
No - Continue below.


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.