Signal Too High
Signal too high
Checking the status
- Start the engine.
Check whether the fault is permanent or intermittent by reading off the signal from the mass air flow (MAF) sensor.
Check that the signal is between 0.5 - 4.5 V.
The fault is permanent if the signal is incorrect. The fault is intermittent if the signal is correct.
Continue - Checking the component and wiring
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Checking the component and wiring
Check the cable between engine control module (ECM) terminal #A70 (#B10) and mass air flow (MAF) sensor terminal #3. Check for a short-circuit to supply voltage.
Remedy as necessary.
Other information
- Connecting the breakout box Connecting The Breakout Box, Engine Control Module (ECM)
- Signal specification Signal Specification, Engine Control Module (ECM)
- Mass air flow (MAF) sensor Service and Repair
- Checking wiring and terminals Checking Wiring and Terminals
Continue - Verification
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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.
Read off the signal from the mass air flow (MAF) sensor.
Check that the signal is between 0.5 - 4.5 V.
Is the signal within its permitted range?
Yes - VERIFIED
No - VERIFICATION FAILED
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VERIFICATION FAILED - Fault-tracing information
VERIFIED - Fault Found
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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
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Attempt New Test - Checking the status
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