Diagnostic procedure
WARNING: This page is about a different car, the 2009 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | Visually inspect for fuel leakage at fuel injector O-ring and fuel line. Service if necessary. Install the fuel pressure gauge between the fuel pipe and the fuel distributor. Start engine and idle it Measure fuel line pressure during idle Is fuel line pressure correct during idle? (See FUEL LINE PRESSURE INSPECTION [MZI-3.7] .) |
Yes | Go to the next step. |
| No | Replace the fuel pump unit. (See FUEL PUMP UNIT REMOVAL/INSTALLATION [MZI-3.7] .) |
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| 2 | Inspect for blockage/restriction or open circuit in wiring harness between the engine vacuum port and the charcoal canister Inspect for blockage in fuel tank vent system Is malfunction indicated? |
Yes | Replace vacuum hose |
| No | Go to the next step. | ||
| 3 | Inspect the purge solenoid valve (See PURGE SOLENOID VALVE INSPECTION [MZI-3.7] .) Is the solenoid operating properly? |
Yes | Go to the next step |
| No | Replace the purge solenoid valve. (See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [MZI-3.7] .) |
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| 4 | Connect the M-MDS to the DLC-2 Switch ignition to ON (Engine off). Retrieve any DTCs. Are there any DTCs displayed? |
Yes | DTC is displayed: Go to the appropriate DTC inspection (See DTC TABLE [MZI-3.7] .) |
| No | No DTC is displayed: Inspect charcoal canister for fuel saturation If excess amount of liquid fuel is present, replace the charcoal canister. |
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| 5 |
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