Map Sensor Operation Test: Notes
For a complete wiring diagram, refer to appropriate Wiring Diagram.
Test Step 1 - MAP Sensor Wiring and Connectors
NOTE:
Diagnose and resolve any MAP sensor DTCs before proceeding with this test.
- Turn the ignition off.
- Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP sensor and the PCM.
- Look for any chafed, pierced, pinched, or partially broken wires.
- Look for broken, bent, pushed out or corroded terminals.
- Turn the ignition on.
- Monitor the scan tool data relative to the sensor and wiggle test the wiring and connectors.
- Look for the data to change or for a DTC to set during the wiggle test. If necessary, check each sensor circuit for high resistance or a shorted condition.
Were any problems found?
Yes
- Repair as necessary.
- Perform the PCM Verification Test. Refer to PCM VERIFICATION TEST .
No
- Go to Test Step TEST STEP 2 - MAP VACUUM BAROMETRIC PRESSURE .