Manifold Absolute Pressure (Map) Sensor Inspection - Mazda 2002 6 Workshop Manual

Circuit Open/Short Inspection
1. Disconnect the PCM connector. (See
REMOVAL/INSTALLATION.)
2. Inspect the following wiring harnesses for open or
short. (Continuity check)
Open circuit
• If there is no continuity, the circuit is open. Repair
or replace the harness.
— TP sensor terminal A (harness-side) and
PCM terminal 2H (harness-side)
— TP sensor terminal B (harness-side) and
PCM terminal 2A (harness-side)
— TP sensor terminal C (harness-side) and
PCM terminal 2K (harness-side)
Short circuit
• If there is continuity, the circuit is shorted. Repair or replace the harness.
— TP sensor terminal C (harness-side) and power supply
— TP sensor terminal C (harness-side) and body GND
— TP sensor terminal B (harness-side) and power supply
— TP sensor terminal B (harness-side) and body GND
— TP sensor terminal A (harness-side) and power supply
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MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR INSPECTION

Note
• Perform the following inspection only when directed.
• The following vacuum values are indicated by relative pressure from the MAP sensor.
1. Connect the SSTs (WDS or equivalent) to the DLC-2.
2. Turn the ignition switch to ON (Engine OFF).
3. Select MAP PID on the SSTs (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. (See
REMOVAL/INSTALLATION.)
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 (harness-side) and
PCM terminal 2H
— MAP sensor terminal D (harness-side) and
PCM terminal 1J
— MAP sensor terminal C (harness-side) and
PCM terminal 2K
Short circuit
• If there is continuity, the circuit is shorted. Repair or replace the harness.
— MAP sensor terminal C (harness-side) and power supply.
— MAP sensor terminal C (harness-side) and body GND.
— MAP sensor terminal D (harness-side) and power supply.
— MAP sensor terminal D (harness-side) and body GND
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F–52
CONTROL SYSTEM
F–43 PCM
F–43 PCM
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A6E394018211W01
A6E3940W009