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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)