Checking Components And Wiring
Check the mass air flow (MAF) sensor connector. Check for contact resistance and oxidation.
Check for air leakage in the intake system and for damage to hoses etc.
Check the power supply cable between system relay terminal #5 and mass air flow (MAF) sensor terminal #2. Check for an open-circuit.
Check the signal cable between engine control module (ECM) terminal #A22 (#A22) and mass air flow (MAF) sensor terminal #5. Check for an open-circuit. Check for a short-circuit to ground.
Check the power supply cable between engine control module (ECM) terminal #A39 (#A39) and mass air flow (MAF) sensor terminal #4. Check for an open-circuit.
HINT: With the ignition on and the mass air flow (MAF) sensor connector connected the voltage at mass air flow (MAF) sensor terminal #2 must be approximately U bat.
Remedy as necessary.
Other information
- see CONNECTING THE BREAKOUT BOX
- see CHECK FOR AIR LEAKS IN THE INTAKE SYSTEM
- see MASS AIR FLOW (MAF) SENSOR, REPLACING
- For 5 cylinder turbocharged engines -2004, see SIGNAL DESCRIPTION
- For 5 cylinder turbocharged engines 2005-, see SIGNAL SPECIFICATION .
- For 6 cylinder engines -2004, see SIGNAL SPECIFICATION
- For 6 cylinder engines 2005-, see SIGNAL SPECIFICATION .
- see CHECKING WIRING AND TERMINALS
- Continue
Refer to VERIFICATION