Checking wiring and connectors
Check the control module and mass air flow (MAF) sensor connectors for contact resistance and oxidation according to Contact resistance and oxidation . Also check for loose connections according to Loose connections (terminals) . The intake air temperature (IAT) sensor is integrated in the mass air flow (MAF) sensor.
Check the signal cable between control module connector terminal A4 (#A4) and mass air flow (MAF) sensor connector terminal 3 for an intermittent open-circuit according to Open-circuit, intermittent faults . Also check for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .
Check the ground lead between control module connector terminal A61 (#B3) and mass air flow (MAF) sensor connector terminal 4 for an intermittent open-circuit according to Open-circuit, intermittent faults .
Other information:
- To connect the breakout box, see Connecting the breakout box
- To access / replace the control module see Engine control module (ECM), replacing
- To access / replace the Mass Air Flow (MAF) sensor, see Replacing the mass air flow (MAF) sensor
- For information about signals, see Signal specification .
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Refer to Information