Checking the component, wiring and connector
Check mass air flow (MAF) sensor connector for intermittent contact resistance, oxidation according to Contact resistance and oxidation and intermittent loose connections according to Contact resistance and oxidation .
Check that there is no air leakage in the intake system or damage to hoses etc according to Check for air leaks in the intake system .
Check signal cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .
Check signal cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Check power supply cable between engine control module (ECM) #A39 (#A39) and mass air flow (MAF) sensor #4 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Check power supply cable between engine control module (ECM) #A70 (#A70) and mass air flow (MAF) sensor #2 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Remedy as necessary
Other information
- Connecting the breakout box/accessing the control module, see Connecting the breakout box .
- To access/replace the mass air flow (MAF) sensor, see Mass air flow sensor (MAF), 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 Ubat , mass air flow (MAF) sensor #3 should be ground and mass air flow (MAF) sensor #5, signal cable, should be approximately 1 volt.
- For information about signals on 5-cyl engines, see Signal specification .
- For information about signals on 6 cylinder engines:
- For 6 cylinder engines -2001, see Signal specification
- For 6 cylinder engines 2002-, see Signal specification
- For 6 cylinder engines -2004, see Signal specification
- For 6 cylinder engines 2005-, see Signal specification .
- Continue
Refer to Information