Circuit/System Verification
- Connect the variable speed generator to the signal circuit and ground of the MAF sensor.
- To set up the variable speed generator, use the switches to set the duty cycle to normal, the frequency to 5 K, and the signal switch to 5 volts.
- Start the engine.
- Observe the MAF sensor parameter on the scan tool for the correct range of 4,950-5,025 Hz
- If not within range, replace the control module.