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-> Yes GO to Pinpoint Test G549822t142.
-> No INSTALL a new left hand bank MAF sensor. Mass Air Flow (MAF) Sensor (18.30.15) G549822t142 : CHECK THE SUPPLY TO THE MAF SENSOR 1. Key on, engine off. 2. Measure the voltage between: EC68, harness side Battery
Pin 04
Negative terminal
Is the voltage between 9 - 15 volts? -> Yes GO to Pinpoint Test G549822t143.
-> No REPAIR the ECM to left hand bank MAF sensor supply circuit as necessary. For additional information, refer to the wiring diagrams. Clear any DTCs, test the system for normal operation. G549822t143 : CHECK THE MAF SENSOR CIRCUIT(S) FOR SHORT CIRCUIT 1. Key off. 2. Disconnect the ECM connector, EC66. 3. Key on, engine off. 4. Measure the resistance between: EC68, harness side Battery
Pin 03
Negative terminal Pin 01
Negative terminal
Are the resistances greater than 100 Kohms? -> Yes GO to Pinpoint Test G549822t144.
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