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Engine - Intake-Air System (L3): Diagnosis Mazda 5 I

Mechanical 2 illustrations ~279 words

INTAKE AIR SYSTEM MANIFOLD VACUUM INSPECTION [L3]

  1. Verify that the intake air hoses are installed securely.
  2. Warm up the engine.
  3. Disconnect the vacuum hose connecting the intake manifold and the purge solenoid valve (purge solenoid valve side) and install the vacuum gauge. (See «PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L3]»(ref-244343-S02276159152006092100000) ).
  4. Measure the intake manifold vacuum while idling (no load) using the vacuum gauge. If not within the specification, perform the following inspections. Accelerator cable play Compression pressure (See «COMPRESSION INSPECTION [L3]»(ref-244325-S14131564202006092100000) ). Air suction (installation areas of throttle body, fuel injector, PCV valve, intake manifold) Standard ATX: -57.0 kPa {-428 mmHg, -16.9 inHg} or more MTX: -60.0 kPa {-450 mmHg, -17.8 inHg} or more

AIR CLEANER ELEMENT INSPECTION [L3]

  1. Remove the air cleaner element. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-244332-S08851886592006092100000) ).
  2. Inspect the following items: If there is any abnormality, clean or replace the air cleaner element. Has the replacement interval come? Is the air cleaner element soiled, damaged, or bent? Are the air cleaner case and the air cleaner element correctly sealed? Is the correct air cleaner element installed?

THROTTLE BODY INSPECTION [L3]

Note. Perform the following inspection only when directed.

Scheme 138

Scheme 138: Resistance Inspection
Scheme 138: Resistance Inspection
  1. Disconnect the negative battery cable.
  2. Disconnect the throttle body connector.
  3. Measure the resistance between throttle actuator terminals E and F. If not as specified, replace the throttle body. (See «INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3]»(ref-244332-S08851886592006092100000) ). If as specified, carry out the "Circuit Open/Short Inspection". Specification AMBIENT TEMPERATURE SPECIFICATION Ambient temperature (°C {°F}) Resistance (ohm) Approx. 20 {68} 0.3-100

Scheme 139

Scheme 139: Circuit Open/Short Inspection
Scheme 139: Circuit Open/Short Inspection
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [L3]»(ref-244330-S07461751642006092100000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

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