Journey FWD V6-3.5L (2009)
NOTE: Diagnose and repair any MAP Sensor circuit DTCs before proceeding with this test.
NOTE: Diagnose and repair any sensor supply or system voltage DTCs before proceeding with this test.
1. Turn the ignition off.
2. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the MAP Sensor and the PCM.
3. Look for any chafed, pierced, pinched, or partially broken wires.
4. Look for broken, bent, pushed out or corroded terminals.
5. Turn the ignition on.
6. Monitor the scan tool data relative to the sensor and wiggle test the wiring and connectors.
7. 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. See: Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification
Tests/PCM Verification Test
No
-
Go to 2
2. MAP VACUUM/BAROMETRIC PRESSURE
1. With a scan tool, read the Barometric Pressure.
NOTE: The Barometric Pressure should be approximately equal to the actual barometric pressure. If necessary, compare the Barometric
Pressure value of the tested vehicle to the value of a known good vehicle of a similar make and model.
2. Connect a vacuum gauge to a manifold vacuum source.
3. Start the engine.
NOTE: If engine will not idle, maintain a constant RPM above idle.
WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not
wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.
4. With the scan tool, read the MAP Sensor vacuum.
NOTE: The scan tool reading for MAP vacuum should be within 1" of the vacuum gauge reading.
Were any problems found?
Yes
-
Go to 4
-
Perform the PCM Verification Test. See: Testing and Inspection/Diagnostic Trouble Code Tests and Associated Procedures/Verification
Tests/PCM Verification Test
No
-
Go to 3
3. MAP SENSOR VOLTAGE
1. With the scan tool, monitor the MAP Sensor signal voltage.
2. With the engine idling in neutral or park, snap the throttle.
NOTE: The MAP Sensor signal voltage should change from below 2.0 volts at idle to above 3.5 volts at wide open throttle.
Were any problems found?
Yes
