Engine Control System Operation Inspection [Z6]; Main Relay Operation Inspection; Intake Manifold Vacuum Inspection - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
ENGINE CONTROL SYSTEM OPERATION

Main Relay Operation Inspection

1. Verify that the main relay clicks when the ignition switch turned to the ON position and off.
• If there is no operation sound, inspect the following.
- Main relay (See
- Wiring harness and connector between ignition switch and main relay terminal A
- Wiring harness and connector between PCM terminal 1AW and main relay terminal B

Intake Manifold Vacuum Inspection

1. Verify the air intake hoses are installed properly.
2. Start the engine and idle it.
3. Disconnect the vacuum hose between the intake manifold and purge solenoid valve from the intake
manifold side.
4. Connect a vacuum gauge to the intake manifold and measure the intake manifold vacuum.
• If not as specified, inspect the following.
Specification (ATX)
More than 71 kPa {533 mmHg, 21 inHg}
Specification (MTX)
More than 72 kPa {541 mmHg, 22 inHg}
Note
• Air suction can be located by engine speed change when lubricant is sprayed on the area where
suction is occurring.
- Air suction at throttle body, intake manifold and PCV valve installation points
- Accelerator cable free play
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INSPECTION [Z6]
RELAY INSPECTION.)
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