Mazda 3 - Page 77

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
4
INSPECT IAT SENSOR SIGNAL
CIRCUIT FOR SHORT TO GND
• Turn the ignition switch off.
• Inspect for continuity between MAF/IAT
sensor terminal D (wiring harness-side)
and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a
possible short to GND, then go to Step 7.
No
Go to the next step.
5
INSPECT IAT SENSOR
• Inspect the IAT sensor.
(See INTAKE AIR TEMPERATURE (IAT)
SENSOR INSPECTION [Z6].)
• Is there any malfunction?
Yes
Replace the MAF/IAT sensor, then go to Step 7.
(See MASS AIR FLOW (MAF)/INTAKE AIR
TEMPERATURE (IAT) SENSOR
REMOVAL/INSTALLATION [Z6].)
No
Go to the next step.
6
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to the
next step.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF DTC
P0112 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory
using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [Z6].)
No
Go to the next step.
8
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR PROCEDURE
[Z6].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [Z6].)
No
DTC troubleshooting completed.