Manifold Pressure/Vacuum Sensor: Testing and Inspection

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [LF, L3]

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart.

Voltage Inspection

1. Remove the MAP sensor with the connector still connected. Service and Repair

2. Remove the vacuum hose of the MAP sensor.

3. Verify that the voltage at PCM terminal 2AL is within the specification when the ignition switch is turned to the ON position.

- If not within the specification, replace the MAP sensor.

Voltage
- 2.69-4.37 V

4. Install the vacuum pump.

5. Turn the ignition switch to the ON position.

6. Verify that change in voltage is within the specification when a vacuum of 30 kPa {225 mmHg, 8.86 inHg} is applied using a vacuum pump.

- If not within the specification, replace the MAP sensor.

Voltage variance
- 1.16-1.27 V

Circuit Open/Short Inspection









1. Disconnect the PCM connector.

2. Inspect the following wiring harness for an open or short circuit. (Continuity inspection)

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- MAP sensor terminal A and PCM terminal 2AY*1, 2P*2, 2AA*3
- MAP sensor terminal C and PCM terminal 2AU*1, 2AR*2, 2W*3
- MAP sensor terminal D and PCM terminal 2AG*1, 2AG*2, 2AL*3

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- MAP sensor terminal A and power supply.
- MAP sensor terminal C and body ground.
- MAP sensor terminal D and power supply.
- MAP sensor terminal D and body ground

*1
California emission regulation applicable model
*2
Except for California emission regulation applicable model with LF MTX, L3
*3
Except for California emission regulation applicable model with LF ATX