Manifold Pressure/Vacuum Sensor: Testing and Inspection

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION[L3]

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.
- It 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 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
- MAP sensor terminal D and PCM terminal 2AG
- MAP sensor terminal C and PCM terminal 2AU

Short circuit
- It 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 power supply.
- MAP sensor terminal C and body GND.
- MAP sensor terminal D and power supply.
- MAP sensor terminal D and body GND