Engine - Intake-Air System [L5]: Diagnosis Mazda CX-7 I рестайлинг

INTAKE MANIFOLD VACUUM INSPECTION [L5]

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 INSPECTION [L5]»(ref-375355-S29441551692010102800000) .)
4. Measure the intake manifold vacuum while idling (no load) using the vacuum gauge. If not within the specification, perform the following inspections. Compression pressure (See «COMPRESSION INSPECTION [L5]»(ref-375350-S22657578122010102800000) .) Air suction Installation areas of each vacuum hose Installation area of throttle body Installation area of fuel injector Installation area of PCV valve Installation area of intake manifold Standard Approx. -70.0 kPa {-525 mmHg, -20.7 inHg}

AIR CLEANER ELEMENT INSPECTION [L5]

1. Remove the air cleaner element. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)
2. Inspect the following items: 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? If there is any abnormality, clean or replace the air cleaner element. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)

Scheme 184

1. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [L5]»(ref-375359-S31806842452010102800000) .)
2. Disconnect the throttle body connector.
3. Measure the resistance between throttle body terminals E and F. Throttle body resistance 0.3-100 ohms [20°C {68°F}] If not as specified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)

Scheme 185

Scheme 186

1. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [L5]»(ref-375359-S31806842452010102800000) .)
2. Remove the variable intake air solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)
3. Inspect airflow between the ports under the following conditions. If not as specified, replace the variable intake air solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)

Scheme 187

1. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [L5]»(ref-375359-S31806842452010102800000) .)
2. Remove the variable tumble solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)
3. Inspect airflow between the ports under the following conditions. If not as specified, replace the variable tumble solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)

Scheme 188

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)
2. Disconnect the vacuum hose from the variable intake air shutter valve actuator.
3. Connect a vacuum pump to the variable intake air shutter valve actuator. NOTE: Covered with a hood, the rod of the variable intake air shutter valve actuator cannot be seen from above. Use a mirror from under it to check the operation of the variable intake air shutter valve.
4. Check if the rod operates correctly as stated in the table when a gradual negative pressure is applied to the variable intake air shutter valve actuator. When it is not possible to confirm it, replace the intake manifold. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .) When the variable intake air shutter valve actuator cannot be activated even though the operation of the rod can be confirmed, check for any incorrect connections or breakage of the vacuum hose. AIR VACUUM SPECIFICATION Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-20, -0.8} Not operate Above -33.4 {-251, -9.86} Fully pulled

Scheme 189

1. Remove the air hose. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .)
2. Disconnect the vacuum hose from the variable tumble shutter valve actuator.
3. Connect a vacuum pump to the variable tumble shutter valve actuator. NOTE: Covered with a hood, the rod of the variable tumble shutter valve actuator cannot be seen from above. Use a mirror from under it to check the operation of the variable tumble shutter valve.
4. Check if the rod operates correctly as stated in the table below when a gradual negative pressure is applied to the variable tumble shutter valve actuator. When it is not possible to confirm it, replace the intake manifold. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L5]»(ref-375352-S14647925242010102800000) .) When the variable tumble shutter valve actuator cannot be activated even though the operation of the rod can be confirmed, check for any incorrect connections or breakage of the vacuum hose. AIR VACUUM SPECIFICATION Vacuum kPa {mmHg, inHg} Rod movement Below -2.7 {-20,-0.8} No operate Above -33.4 {-251, -9.86} Fully pulled

Scheme 190

1. Disconnect the negative battery cable. (See «BATTERY REMOVAL/INSTALLATION [L5]»(ref-375359-S31806842452010102800000) .)
2. Remove in the order as indicated below.
3. Install in the reverse order of removal.