NOTE:

Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flow diagram. (See TROUBLESHOOTING PROCEDURE .)

Fig 1: Identifying Data Link Connector - 2

Courtesy of MAZDA MOTORS CORP.

Turn the ignition switch to the ON position (Engine off).
Select MAP PID on the WDS or equivalent.
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. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION .)
- If as verified, go to next step.
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 MAP sensor. (See MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR REMOVAL/INSTALLATION .)

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Manifold Absolute Pressure (Map) Sensor Inspection: Notes