DF12

- Key "OFF".

- Disconnect vacuum supply hose from Manifold Absolute Pressure (MAP) sensor.

- Install vacuum pump to MAP sensor.

- Apply 61 kPa (18 in Hg) vacuum to MAP sensor.

- Does MAP sensor hold vacuum?

Yes -- Release vacuum. Remove vacuum pump. Reconnect vacuum supply hose to MAP sensor. Go to DF13. DF13

No -- Replace MAP sensor. Reconnect vacuum supply hose to MAP sensor. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)