MAP Sensor Solenoid Valve Inspection
Operational Inspection1. Warm up the engine to normal operating temperature and let it idle.
2. Disconnect the vacuum hose from the manifold absolute pressure (MAP) sensor solenoid valve side of the manifold absolute pressure sensor.
3. Put a finger on the port of the MAP sensor solenoid valve and verify that no vacuum is felt.
4. Open the throttle valve. Increase the engine speed to 4,000 rpm and hold it.
5. Put a finger on the port of the manifold absolute pressure sensor solenoid valve and verify that vacuum is felt.
6. If not as specified, check following.
- Manifold absolute pressure sensor solenoid valve
- Vacuum hose for damage or looseness
- ECM terminal voltages
3E (Mass air flow sensor)
4P (MAP sensor solenoid valve)
4AH, 4AL (Crankshaft position sensor)
3X (Closed throttle position switch)
Solenoid Inspection
1. Remove the MAP sensor solenoid valve.
2. Blow air into each port and verify that air flows as specified below.
3. If not as specified, replace the MAP sensor solenoid valve.
4. Apply battery positive voltage between the terminals of the MAP sensor solenoid valve.
5. Blow air into each port and verify that air flows as specified below.
6. If not as specified, replace the MAP sensor solenoid valve.