DC15 - Check MAF Circuit Output

- Key Off.

- MAF sensor connected.

- Breakout box installed, PCM connected.

- Key On, engine running.

NOTE: If a stabilized Idle is not at least 700 rpm, go to Symptom Flow Charts. Testing and Inspection

- Measure the voltage between Test Pin 88 (MAF SIG) at the breakout box and battery negative post.

- Is the voltage at Idle between 0.34 and 1.96 volts?

YES -- MAF SIG to the PCM is OK. GO to DC16. DC16 - Check MAF Circuit Output With Scan Tool

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