Fuel Injector Operation Inspection
WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
WARNING:
- When inspecting or repairing the fuel system, always proceed with the diagnostics while verifying the [warnings] in the procedure. Not heeding the warnings could lead to an accident which could cause serious injury or death, and damage to equipment.
- Connect the M-MDS to the DLC-2.
- Start the engine and warm it up.
- Perform the KOER self-test and verify that none of the following DTCs is detected. (See DTC INSPECTION
.)
- P0201:00
- P0202:00
- P0203:00
- P0204:00
- If any of the following DTCs can be verified, perform the applicable DTC inspection. (See DTC TABLE [PCM (SKYACTIV-G (US))]
.)
- P0201:00
- P0202:00
- P0203:00
- P0204:00
- Monitor the engine speed (ENG_RPM) signal using the PID/data monitor function. (See PID/DATA MONITOR INSPECTION .)
- Using the simulation function [INJ], verify that the PID [ENG_RPM] decreases when operation of each injector is stopped. (See SIMULATION INSPECTION
.)
- If there is no decrease, perform the following procedure.
- Inspect the resistance for the fuel injectors. (See RESISTANCE INSPECTION .)
- If there is no malfunction in the fuel injectors, inspect the connection condition of the following connectors for the applicable cylinders.
- PCM
- Fuel injector
- If the connection condition of the connectors is normal, replace the applicable fuel injectors. (See FUEL INJECTOR REMOVAL/INSTALLATION .)