Manifold Pressure/Vacuum Sensor: Testing and Inspection

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION [L3 WITH TC]

NOTE:
- Perform the following inspection only when directed
- The following vacuum values are indicated by relative pressure from the MAP sensor.

1. Connect the WDS or equivalent to the DLC-2.
2. Turn the ignition switch to ON (Engine off).
3. Select MAP PID on the WDS or equivalent.
4. Verify that the MAP PID (pressure) and barometric pressure are practically equal.
- If not as verified, perform the "Circuit Open/Short Inspection".
- If there is no open or short circuit, replace the MAP sensor.
- If as verified, go to next step.

5. Apply vacuum of -25.0 kPa {-187 mmHg, -7.38 inHg} to the MAP sensor, and verify that the MAP variation from that of Step 4 is approx. 25.0 kPa {187 mmHg, 7.38 inHg}.
- If not as verified, perform the "Circuit Open/Short inspection".
- If there is no open or short circuit, replace the barometric pressure sensor.

Circuit Open/Short Inspection

1. Disconnect the PCM connector.




2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)

Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- MAP/boost air temperature sensor terminal A and PCM terminal 2H
- MAP/boost air temperature sensor terminal D and PCM terminal 1J
- MAP/boost air temperature sensor terminal C and PCM terminal 2K

Short circuit
- If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- MAP/boost air temperature sensor terminal C and power supply.
- MAP/boost air temperature sensor terminal C and body ground.
- MAP/boost air temperature sensor terminal D and power supply.
- MAP/boost air temperature sensor terminal D and body ground.