Mazda 3 Workshop Manual page 422

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
VERIFY CURRENT INPUT SIGNAL STATUS
OF MAF SENSOR
• Connect the WDS or equivalent to the DLC-2.
• Start the engine.
8
• Access the MAF PID.
• Verify that the MAF PID changes quickly
according to engine speed.
• Is the PID normal?
INSPECT FRONT HO2S
• Inspect front HO2S.
9
(See FRONT HEATED OXYGEN SENSOR
(HO2S) INSPECTION
• Is there any malfunction?
INSPECT FUEL INJECTOR
• Inspect fuel injector.
10
(See FUEL INJECTOR
• Is there any malfunction?
INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE
INSPECTION".
11
(See FUEL LINE PRESSURE
• Is there any malfunction?
INSPECT FUEL SYSTEM FOR FUEL
LEAKAGE
• Visually inspect fuel leakage in the fuel
12
system.
• Is there fuel leakage?
VERIFY TROUBLESHOOTING OF DTC P2195
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
13
the WDS or equivalent.
• Perform the PCM Adopted Memory Produce
Drive Mode and HO2S heater, and TWC Repair
Verification Drive Mode.
(See OBD DRIVE MODE
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Yes Go to the next step.
Replace MAF/IAT sensor, then go to Step
No
14.
Replace front HO2S, then go to Step 14.
Yes
(See HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION
No Go to the next step.
Replace suspected fuel injector, then go to
Step 14.
Yes
(See FUEL INJECTOR
REMOVAL/INSTALLATION
No Go to the next step.
Yes Go to the next step.
No Go to Step 13.
Repair or replace the malfunctioning part,
Yes
then go to the next step.
Replace the fuel pump unit, then go to the
next step.
No
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION.)
Replace PCM, then go to the next step.
Yes
(See PCM REMOVAL/INSTALLATION
[LF].)
No Go to the next step.
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