MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION[L3]

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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 the 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.

Circuit Open/Short Inspection

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

2.  Inspect the following wiring harness for open or short. (Continuity check)

Open circuit

•  If there is no continuity, the circuit is open. Repair or replace the harness.

―  MAP sensor terminal A and PCM terminal 2AX

―  MAP sensor terminal D and PCM terminal 2AL

―  MAP sensor terminal C and PCM terminal 2AT

Short circuit

•  If there is continuity, the circuit is shorted. Repair or replace the harness.

―  MAP sensor terminal A and power supply.

―  MAP sensor terminal C and power supply.

―  MAP sensor terminal C and body ground.

―  MAP sensor terminal D and power supply.

―  MAP sensor terminal D and body ground