Mazda 6. Manual — part 142
F–90
ON-BOARD DIAGNOSTIC
End Of Sie
DTC P0111
A6E397001084W13
Diagnostic procedure
6
VERIFY MAP SENSOR SIGNAL CIRCUIT FOR
SHORT TO CONSTANT VOLTAGE CIRCUIT
• Inspect for continuity between MAP sensor
terminal D and C (harness-side).
• Is there any continuity?
Yes Repair or replace suspected harness, then go to Step 8.
No
Go to next step.
7
VERIFY MAP SENSOR SIGNAL CIRCUIT FOR
OPEN CIRCUIT
• Inspect continuity between MAP sensor
terminal D (harness-side) and PCM terminal 1J
(harness-side).
• Is there any continuity?
Yes Go to next step.
No
Repair or replace suspected harness, then go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P0108
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Turn ignition key to ON (Engine OFF).
• Clear DTC from memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See
.)
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
DTC P0111
IAT circuit performance problem
DETECTION
CONDITION
• If intake air temperature is higher than engine coolant temperature by 40 °C {104 °F} with ignition key on,
the PCM determines that there is a IAT sensor performance problem.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition in two consecutive drive cycles or in one
drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.
POSSIBLE
CAUSE
• IAT sensor malfunction
• Poor connection at MAF/IAT sensor or PCM connector
• PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes Go to next step.
No
Record FREEZE FRAME DATA on repair order, then go to
next step.
2
VERIFY RELATED SERVICE INFORMATION
AVAILABILITY
• Check for related Service Information
availability.
• Is any related Service Information available?
Yes Perform repair or diagnosis according to available Service
Information.
• If vehicle is not repaired, go to next step.
No
Go to next step.
3
INSPECT POOR CONNECTION OF MAF/IAT
SENSOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect MAF/IAT sensor connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Are there any malfunctions?
Yes Repair or replace terminal, then go to Step 6.
No
Go to next step.
4
INSPECT IAT SENSOR
• Inspect IAT sensor.
F–50 INTAKE AIR TEMPERATURE (IAT)
)
• Is IAT sensor okay?
Yes Replace MAF/IAT sensor, then go to Step 6.
No
Go to next step.
ON-BOARD DIAGNOSTIC
F–91
F
End Of Sie
DTC P0112
A6E397001084W14
5
INSPECT POOR CONNECTION OF PCM
CONNECTOR
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Are there any malfunction?
Yes Repair or replace terminal, then go to Step 6.
No
Go to next step.
6
VERIFY TROUBLESHOOTING OF DTC P0111
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Start engine and run engine under FREEZE
FRAME DATA condition.
• Is PENDING CODE the same as DTC
present?
Yes Replace PCM, then go to next step.
(See
No
Go to next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See
No
Troubleshooting completed.
STEP
INSPECTION
ACTION
DTC P0112
IAT circuit low input
DETECTION
CONDITION
• PCM monitors IAT sensor signal at PCM terminal 2E. If PCM detects IAT sensor voltage below 0.15 V,
PCM determines that IAT sensor circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE
CAUSE
• IAT sensor malfunction
• Short to ground circuit between MAF/IAT sensor terminal D and PCM terminal 2E
• Short each harness IAT signal circuit and IAT ground circuit.
• PCM malfunction
F–92
ON-BOARD DIAGNOSTIC
Diagnostic procedure
End Of Sie
DTC P0113
A6E397001084W15
STEP
INSPECTION
ACTION
1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
.)
• Is same DTC present?
Yes Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See
2
INSPECT IAT SENSOR TERMINAL
• Turn ignition key to OFF.
• Disconnect MAF/IAT sensor connector.
• Inspect for bent terminal of MAF/IAT sensor
terminals D and E (part-side).
• Is there any malfunction?
Yes Repair or replace terminal, then go to Step 6.
No
Go to next step.
3
CLASSIFY IAT SENSOR MALFUNCTION OR
HARNESS MALFUNCTION
• Connect WDS or equivalent to DLC-2.
• Access IAT PID.
• Verify IAT value when disconnecting MAF/IAT
sensor connector.
• Does IAT value change?
Yes Replace MAF/IAT sensor, then go to Step 6.
No
Go to next step.
4
INSPECT IAT SIGNAL CIRCUIT FOR SHORT TO
GROUND
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect continuity between MAF/IAT sensor
terminal D (harness-side) and body ground.
• Is there any continuity?
Yes Repair or replace harness for short to ground, then go to
Step 6.
No
Go to next step.
5
INSPECT IAT CIRCUITS FOR SHORT
• Inspect continuity between MAF/IAT sensor
terminals D and E (harness-side).
• Is there continuity?
Yes Repair or replace harness for short, then go to Step 6.
No
Go to next step.
6
VERIFY TROUBLESHOOTING OF DTC P0112
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear DTC from PCM memory using WDS or
equivalent.
• Perform KOEO/KOER self-test.
.)
• Is same DTC present?
Yes Replace PCM, then go to next step.
(See
No
Go to next step.
7
VERIFY AFTER REPAIR PROCEDURE
• Perform “After Repair Procedure”.
• Is there any DTC present?
Yes Go to applicable DTC troubleshooting.
(See
.)
No
Troubleshooting completed.
DTC P0113
IAT circuit high input
DETECTION
CONDITION
• PCM monitors input voltage from IAT sensor If input voltage at PCM terminal 2E is above 4.9 V, PCM
determines that IAT sensor circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE
CAUSE
• IAT sensor malfunction
• Open circuit between MAF/IAT sensor terminal D and PCM terminal 2E
• Short to power circuit between MAF/IAT sensor terminal D and PCM terminal 2E
• Open circuit between MAF/IAT sensor terminal E and PCM terminal 2H
• Poor connection at MAF/IAT sensor or PCM connector.
• PCM malfunction
ON-BOARD DIAGNOSTIC
F–93
F
Diagnostic procedure
STEP
INSPECTION
ACTION
1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
.)
• Is same DTC present?
Yes Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT
CONCERN TROUBLESHOOTING procedure.
(See
2
INSPECT POOR CONNECTION OF IAT
SENSOR CONNECTOR
• Turn ignition key to OFF.
• Disconnect MAF/IAT sensor connector.
• Inspect for poor connection (damaged, pulled-
out pins, corrosion, etc.).
• Are there any malfunctions?
Yes Repair or replace terminal, then go to Step 8.
No
Go to next step.
3
CLASSIFY IAT SENSOR MALFUNCTION OR
HARNESS MALFUNCTION
• Connect WDS or equivalent to DLC-2.
• Access IAT PID.
• Connect a jumper wire between MAF/IAT
sensor terminals D and E.
• Verify IAT value
• Is voltage below 4.9 V?
Yes Replace MAF/IAT sensor, then go to Step 8.
No
Go to next step.
4
INSPECT IAT SENSOR SIGNAL CIRCUIT FOR
SHORT TO POWER
• Turn ignition key to ON (Engine OFF).
• Measure voltage between MAF/IAT sensor
terminal D (harness-side) and body ground.
• Is voltage B+?
Yes Repair or replace harness for short to power, then go to
Step 8.
No
Go to next step.
DTC P0113
IAT circuit high input
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