Checking component and wiring
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 the signal cable between engine control module (ECM) #A22 (#A22) and mass air flow sensor (MAF) #5 for an open circuit according to Open-circuit, permanent faults .
Check the signal cable between engine control module (ECM) #A22 (#A22) and mass air flow (MAF) sensor #5 for a short-circuit to ground according to Short-circuit to ground, permanent faults .
Check power supply cable between engine control module (ECM) #A39 (#A39) and mass air flow (MAF) sensor #4 for an open-circuit according to Open-circuit, permanent faults .
Check power supply cable between engine control module (ECM) #A70 (#A70) and mass air flow (MAF) sensor #2 for an open-circuit according to Open-circuit, permanent 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 the mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor #2 should be approximately Ubatt , mass air flow (MAF) sensor #3 should be ground and mass air flow (MAF) sensor #5 should be approximately 1 V.
- For information about signals, see ELECTRICAL SYSTEM
- Continue
Refer to Verification