Circuit/System Verification
- Verify the integrity of the MAP sensor system by inspecting for the following conditions:
- Any damage to the MAP sensor housing
- Any damage to the MAP sensor seal
- A loose or improperly installed MAP sensor
- A restriction in the vacuum source of the MAP sensor
- Use the scan tool and compare the MAP Sensor parameter to a known good vehicle, under various operating conditions.
- Use the scan tool and compare the MAP Sensor parameter at ignition ON, with the engine OFF, to the Altitude vs Barometric Pressure table. Refer to Altitude vs Barometric Pressure .