MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION[L3 Turbo]

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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.

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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 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 Turbo].)

Circuit Open/Short Inspection

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1.  Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION[L3 Turbo].)

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