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 M-MDS to the DLC-2.






2. Turn the ignition switch to ON (Engine off).

3. Select MAP PID on the M-MDS.

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 isapprox. 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. (See Service and Repair.)

Circuit Open/Short Inspection









1. Disconnect the PCM connector. (See Service and Repair.)

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 2AV
- MAP/boost air temperature sensor terminal C and PCM terminal 2AU
- MAP/boost air temperature sensor terminal D and PCM terminal 2AG

Short circuit

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

- MAP/boost air temperature sensor terminal A 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