Mazda 6 - Dtc P0112

ON-BOARD DIAGNOSTIC
F2–67
F2
Diagnostic procedure
End Of Sie
DTC P0112
B6E407000100108
STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes Go to the next step.
No Record the FREEZE FRAME DATA on the repair order,
then go to the next step.
2 VERIFY RELATED REPAIR INFORMATION
AVAILABILITY
• Verify related service repair information
availability.
• Is any related repair information available?
Yes Perform repair or diagnosis according to the available
repair information.
• If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 VERIFY CURRENT SIGNAL STATUS: IS
CONCERN INTERMITTENT OR CONSTANT?
• Connect the WDS or equivalent to the DLC-2.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes Go to the next step.
No Intermittent concern exists.
Perform the “INTERMITTENT CONCERNS
TROUBLESHOOTING”.
4 INSPECT MAF/IAT SENSOR CONNECTOR FOR
POOR CONNECTION
• Turn the engine switch off.
• Disconnect the MAF/IAT sensor 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 Step 7.
No Go to the next step.
5 INSPECT IAT SENSOR NO.1
• Inspect the IAT sensor No.1.
• Is there any malfunction?
Yes Replace the MAF/IAT sensor, then go to Step 7.
No Go to the next step.
6 INSPECT PCM CONNECTOR FOR POOR
CONNECTION
• Turn the engine 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 P0111
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the WDS or equivalent.
• Start the engine and warm it up completely.
• Is the PENDING CODE for this DTC present?
Yes Replace the PCM, then go to the next step.
No Go to the next step.
8 VERIFY AFTER REPAIR PROCEDURE
• Perform the Repair Verification Drive Mode.
(See F2–39 OBD DRIVE MODE.)
• Are any DTCs present?
Yes Go to the applicable DTC inspection.
(See F2–40 DTC TABLE.)
No DTC troubleshooting completed.
DTC P0112 Intake air temperature (IAT) sensor No.1 circuit low input
DETECTION
CONDITION
• The PCM monitors the input signal from intake air temperature sensor No.1. If the voltage from intake air
temperature sensor No.1 is less than 0.14 V, the PCM determines that there is a malfunction in the intake
air temperature sensor No.1 circuit.
Diagnostic support note
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• FREEZE FRAME DATA is available.
• The DTC is stored in the PCM memory.
POSSIBLE
CAUSE
• IAT sensor No.1 malfunction
• Connector or terminal malfunction
• Short to GND in wiring harness between MAF/IAT sensor terminal D and PCM terminal 60
• PCM malfunction