Mazda 3 Workshop Manual page 228

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Are the PIDs normal?
VERIFY CURRENT INPUT SIGNAL
STATUS OF MAF SENSOR
• Connect the WDS or equivalent to the
DLC-2.
• Start the engine.
7
• Access the MAF PID.
• Verify that the MAF PID changes
quickly according to engine speed.
• Is the PID normal?
INSPECT FRONT HO2S
• Inspect the front HO2S.
8
(See FRONT HEATED OXYGEN
SENSOR (HO2S) INSPECTION
• Is there any malfunction?
INSPECT FUEL INJECTOR
• Inspect the fuel injector.
9
(See FUEL INJECTOR
• Is there any malfunction?
INSPECT FUEL LINE PRESSURE
• Perform the "FUEL LINE PRESSURE
INSPECTION".
10
(See FUEL LINE PRESSURE
INSPECTION.)
• Is there any malfunction?
VERIFY TROUBLESHOOTING OF DTC
P2196 COMPLETED
• Make sure to reconnect all
disconnected connectors.
• Clear the DTC from the PCM memory
using the WDS or equivalent.
11
• Perform the "HO2S heater, HO2S, and
TWC Repair Verification Drive Mode".
(See OBD DRIVE MODE
• Is the PENDING CODE for this DTC
present?
12 VERIFY AFTER REPAIR PROCEDURE Yes
Downloaded from
Yes Go to the next step.
No
Yes
[Z6].)
No Go to the next step.
Yes
INSPECTION.)
No Go to the next step.
Yes
No Go to the next step.
Yes
No Go to the next step.
[Z6].)
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Replace the MAF/IAT sensor, then go to Step 11.
(See MASS AIR FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION
Replace the front HO2S, then go to Step 11.
(See FRONT HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION
Replace the fuel injector, then go to Step 11.
(See FUEL INJECTOR
REMOVAL/INSTALLATION
Replace the fuel pump unit, then go to the next
step.
(See FUEL PUMP UNIT
REMOVAL/INSTALLATION.)
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION
Go to the applicable DTC inspection.
(See DTC TABLE [Z6].)
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[Z6].)
[Z6].)
[Z6].)
[Z6].)