DC17 - Verify MAF Circuit Input and Output

- Key Off.

- MAF sensor connected.

- Breakout box installed, PCM connected.

- Key On, engine running.

- Measure the voltage between Test Pin 88 (MAF SIG) and Test Pin 36 (MAF RTN) at the breakout box.

- Is the voltage between 0.34 and 1.96 volts?

YES -- MAF SIG is open in the PCM. REPLACE PCM. REMOVE breakout box. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

NO -- MAF RTN is open in the MAF sensor. REPLACE MAF sensor. REMOVE breakout box. RECONNECT PCM. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes