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Engine - Intake-Air System [1.3L]: Diagnosis Mazda RX-8 I рестайлинг

Mechanical 20 illustrations ~1071 words

INTAKE-AIR SYSTEM INSPECTION [13B-MSP]

  1. Perform the following intake-air system part inspections. NOTE: If there is improper installation or a malfunction of an intake-air system part, it could cause poor emission, low engine output, or rough idling.

Scheme 131

Scheme 131: Air Hose Inspection
Scheme 131: Air Hose Inspection
  1. Visually inspect the following items: If there is any abnormality, reinstall or replace the air hose. Is there any looseness or disconnection of air hose and air cleaner cover connecting parts? Is there any looseness or disconnection of air hose and throttle body connecting parts? Is the hose correctly installed? Are there any cracks or splits in the air hose?

Hose Inspection

  1. Refer to the intake-air system hose routing diagram and verify that the hoses are installed in the correct positions. (See «INTAKE-AIR SYSTEM VACUUM HOSE ROUTING DIAGRAM [13B-MSP]»(ref-367618-S19617771382010072700000) ). If there is any abnormality, install in the correct position.
  2. Verify that there is no crushing, cracks, or splits on the hose. If there is any abnormality, repair or replace the hose.

Fresh-Air Duct Inspection

  1. Remove the fresh air duct. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  2. Verify that there is no damage or peeling on the heat shield gasket for the fresh air duct.
  1. If there is any abnormality, repair or replace the fresh air duct. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).

Scheme 132

Scheme 132
Scheme 132

Scheme 133

Scheme 133: Air Cleaner Insulator Inspection
Scheme 133: Air Cleaner Insulator Inspection
  1. Verify that the air cleaner insulator has been installed. If it has not been installed, install an air cleaner insulator.

Scheme 134

Scheme 134: AIR CLEANER ELEMENT INSPECTION [13B-MSP]
Scheme 134: AIR CLEANER ELEMENT INSPECTION [13B-MSP]

Scheme 135

Scheme 135
Scheme 135
  1. Hold up the air cleaner as shown in the figure to remove the rubber from the air cleaner case.
  2. Remove the air cleaner element from the air cleaner.
  3. 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?

Resistance Inspection

  1. Remove the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  2. Verify that there is no continuity between the throttle body and throttle body each terminal. If not as specified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  3. Measure the resistance between the throttle actuator terminals. If not as specified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ). If as specified, carry out the "Circuit Open/Short Inspection".

Scheme 136

Scheme 136
Scheme 136

Throttle valve actuator resistance

Ambient temperature (°C {°F})Resistance (ohm)
Approx. 20 {68}0.3-100

THROTTLE VALVE ACTUATOR RESISTANCE SPECIFICATIONS

Scheme 137

Scheme 137
Scheme 137

Circuit Open/Short Inspection

  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

Scheme 138

Scheme 138
Scheme 138

Throttle Valve Inspection

  1. Remove the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  2. Open the throttle valve from the closed position to open the fully position by hand.
  3. Verify that the throttle valve moves smoothly. If cannot be verified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  4. Release hand from the throttle valve when at the fully open position.
  5. Verify that the throttle valve returns to the closed position smoothly by spring force. If cannot be verified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  6. Press the throttle valve from the closed position to the fully closed position by hand.
  7. Verify that the throttle valve move approximately 5°. If cannot be verified, replace the throttle body. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

SECONDARY SHUTTER VALVE (SSV) ACTUATOR INSPECTION [13B-MSP]

  1. Disconnect the vacuum hose of the SSV actuator.
  2. Install the vacuum pump to the SSV actuator.
  3. Verify that the rod moves as indicated in the table below when gradually applying a vacuum to the SSV actuator.
  1. If there is any malfunction, replace the SSV. (See «INTAKE MANIFOLD DISASSEMBLY/ASSEMBLY [13B-MSP]»(ref-367618-S17057682032010072700000) ).

Rod movement

Vacuum (kPa {mmHg, inHg})Rod movement
4.0 {-30, -1.2}Starts to move
25.3 {-190, -7.47}Fully pulled
1.3 {-9.8, -0.38}Fully returned

ROD MOVEMENT REFERENCE CHART

Scheme 139

Scheme 139
Scheme 139

VARIABLE FRESH AIR DUCT (VFAD) SOLENOID VALVE INSPECTION [13B-MSP]

  1. Disconnect the negative battery cable.
  2. Remove the VFAD solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  3. Inspect for airflow with the steps in the figure below.
  1. If there is any malfunction, replace the VFAD solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  2. If as specified, carry out the "Circuit Open/Short Inspection".

Scheme 140

Scheme 140
Scheme 140

Scheme 141

Scheme 141
Scheme 141
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

Scheme 142

Scheme 142
Scheme 142

VARIABLE FRESH AIR DUCT (VFAD) ACTUATOR INSPECTION [13B-MSP]

  1. Remove the front bumper. (See «FRONT BUMPER REMOVAL/INSTALLATION»(ref-367651-S16887864132010072700000) ).
  2. Disconnect the vacuum hose of the VFAD actuator.
  3. Install the vacuum pump to the VFAD actuator.
  4. Verify that the rod moves as indicated in the table below when gradually applying a vacuum to the VFAD actuator.
  1. If it cannot be verified, replace the fresh-air duct. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).

Rod movement

Vacuum (kPa {mmHg, inHg})Rod movement
13 {-97.5, -3.8} or moreStarts to move
40 {-300.0, -11.8} or lessFully pulled
8.7 {-65.3, -2.6} or moreFully returned

ROD MOVEMENT REFERENCE CHART

Scheme 143

Scheme 143
Scheme 143

VARIABLE DYNAMIC EFFECT INTAKE-AIR (VDI) SOLENOID VALVE INSPECTION [13B-MSP]

  1. Disconnect the negative battery cable.
  2. Remove the VDI solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  3. Inspect for airflow with the steps in the figure below.
  1. If there is any malfunction, replace the VDI solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [13B-MSP]»(ref-367618-S14848159782010072700000) ).
  2. If as specified, carry out the "Circuit Open/Short Inspection".

Scheme 144

Scheme 144
Scheme 144

Scheme 145

Scheme 145
Scheme 145
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

Scheme 146

Scheme 146
Scheme 146

VARIABLE DYNAMIC EFFECT INTAKE-AIR (VDI) ACTUATOR INSPECTION [13B-MSP]

  1. Disconnect the VDI actuator vacuum hose.
  2. Install the vacuum pump to the VDI actuator.
  3. Verify that the rod moves as indicated in the table below when gradually applying a vacuum to the VDI actuator.
  1. If it fails, replace the VDI valve. (See «INTAKE MANIFOLD DISASSEMBLY/ASSEMBLY [13B-MSP]»(ref-367618-S17057682032010072700000) ).

Rod Movement

Vacuum (kPa {mmHg, inHg})Rod movement
4.0 {-30, -1.2}Starts to move
25.3 {-190, -7.47}Fully pulled
1.3 {-9.8, -0.38}Fully returned

ROD MOVEMENT REFERENCE CHART

Scheme 147

Scheme 147
Scheme 147
  1. Remove the APV motor. (See «INTAKE MANIFOLD DISASSEMBLY/ASSEMBLY [13B-MSP]»(ref-367618-S17057682032010072700000) ).
  2. Measure the resistance between the APV motor terminals.
  1. If not as specified, replace the APV motor. (See «INTAKE MANIFOLD DISASSEMBLY/ASSEMBLY [13B-MSP]»(ref-367618-S17057682032010072700000) ).

APV motor resistance

8-50 ohms [20 °C {68 °F}]

Scheme 148

Scheme 148
Scheme 148
  1. Disconnect the PCM connector. (See «PCM REMOVAL/INSTALLATION [13B-MSP]»(ref-367617-S28888613132010072700000) ).
  2. Inspect the following wiring harnesses for open or short (continuity check).

Scheme 149

Scheme 149
Scheme 149

CHECK VALVE (ONE-WAY) INSPECTION [13B-MSP]

  1. Remove the check valve.
  2. Verify that there is airflow at port B when blowing air by mouth from port A.
  3. Verify that there is no airflow at port A when blowing air by mouth from port B.
  1. If it cannot be verified, replace the check valve.

Scheme 150

Scheme 150
Scheme 150

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