Mazda CX 7. Manual — part 39
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–111
01-02
DTC P0234[L3 WITH TC]
id010239806200
Diagnostic procedure
End Of Sie
DTC P0234
Turbocharger over boost condition
DETECTION
CONDITION
• If the manifold absolute pressure or charging efficiency are more than the specification for the specified
period of time, the PCM determines that the turbocharger is in an over boost condition.
MONITORING CONDITIONS
— Engine speed is 2,000 rpm or more.
Diagnostic support note
• This is a continuous monitor (Other).
• The MIL does not illuminate.
• FREEZE FRAME DATA is not available.
• DTCs are stored in the PCM memory.
POSSIBLE
CAUSE
• Wastegate control solenoid valve malfunction
• Vacuum hose looseness or damage
• Improper installation of the vacuum hose
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the 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 Bulletins and/or on-line
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
INSPECT WASTEGATE CONTROL SOLENOID
VALVE
• Inspect the wastegate control solenoid valve.
(See01-13-14 WASTEGATE CONTROL
SOLENOID VALVE INSPECTION[L3 WITH
TC].)
• Is there any malfunction?
Yes
Replace the wastegate control solenoid valve, then go to
Step 5.
(See01-13-5 INTAKE AIR SYSTEM REMOVAL/
INSTALLATION[L3 WITH TC].)
No
Go to the next step.
4
INSPECT VACUUM HOSE
• Inspect the vacuum hose condition for the
following:
— Looseness
— Damage
— Improper installation
• Is there any malfunction?
Yes
Repair or replace the suspected part, then go to the next
step.
No
Go to the next step.
5
VERIFY TROUBLESHOOTING OF DTC P0234
COMPLETED
• Make sure to reconnect all the disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
DTC troubleshooting completed.
1871-1U-06B(01-02).fm 111 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–112
DTC P0245[L3 WITH TC]
id010239806300
DTC P0245
Turbocharger wastegate solenoid low
DETECTION
CONDITION
• When the PCM turns the wastegate control solenoid valve off but the wastegate control solenoid valve
circuit voltage is low, the PCM determines that the wastegate control solenoid valve control circuit voltage is
low.
Diagnostic support note
• This is a continuous monitor (Other).
• The MIL does not illuminate.
• PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
• FREEZE FRAME DATA is not available.
• DTCs are stored in the PCM memory.
POSSIBLE
CAUSE
• Wastegate control solenoid valve malfunction
• Connector or terminal malfunction
• Open circuit in the wiring harness between wastegate control solenoid valve terminal A and main relay
• Open circuit in the wiring harness between wastegate control solenoid valve terminal B and PCM terminal
2AA
• Short to ground in the wiring harness between wastegate control solenoid valve terminal B and PCM
terminal 2AA
• PCM malfunction
B
A
PCM
MAIN RELAY
7
6
5
3
3
2AA
WASTEGATE CONTROL SOLENOID VALVE
WIRING HARNESS-SIDE CONNECTOR
A
B
PCM
WIRING HARNESS-SIDE CONNECTOR
7
4
2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2E
2A
2I
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
2H
2D
2L
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2G
2C
2K
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z
2V 2R 2N
2F
2B
2J
1871-1U-06B(01-02).fm 112 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–113
01-02
Diagnostic procedure
End Of Sie
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the 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 Bulletins and/or on-line
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
INSPECT WASTEGATE CONTROL SOLENOID
VALVE CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the wastegate control solenoid
valve 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 8.
No
Go to the next step.
4
INSPECT WASTEGATE CONTROL SOLENOID
VALVE CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch off.
• Inspect for continuity between the wastegate
control solenoid valve terminal B and body
ground.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to
ground, then go to Step 8.
No
Go to the next step.
5
INSPECT WASTEGATE CONTROL SOLENOID
VALVE
• Inspect the wastegate control solenoid valve.
(See01-13-14 WASTEGATE CONTROL
SOLENOID VALVE INSPECTION[L3 WITH
TC].)
• Is there any malfunction?
Yes
Replace the wastegate control solenoid valve, then go to
Step 8.
(See01-13-5 INTAKE AIR SYSTEM REMOVAL/
INSTALLATION[L3 WITH TC].)
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 Step 8.
No
Go to the next step.
7
INSPECT WASTEGATE CONTROL SOLENOID
VALVE GROUND CIRCUIT FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between the following
terminals:
— Wastegate control solenoid valve terminal A
(wiring harness-side) and main relay
— Wastegate control solenoid valve terminal B
(wiring harness-side) and PCM terminal
2AA (wiring harness-side)
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness for an open circuit,
then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0245
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
the M-MDS.
• Start the engine.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”.
(See01-02-10 AFTER REPAIR
PROCEDURE[L3 WITH TC].)
• Are any DTCs present?
Yes
Go to the applicable DTC troubleshooting.
(See01-02-13 DTC TABLE[L3 WITH TC].)
No
DTC troubleshooting completed.
1871-1U-06B(01-02).fm 113 ページ 2006年3月15日 水曜日 午前10時32分
ON-BOARD DIAGNOSTIC [L3 WITH TC]
01-02–114
DTC P0246[L3 WITH TC]
id010239806400
Diagnostic procedure
DTC P0246
Turbocharger wastegate solenoid high
DETECTION
CONDITION
• When the PCM turns the wastegate control solenoid valve on but the wastegate control solenoid valve
circuit voltage is high, the PCM determines that the wastegate control solenoid valve control circuit voltage
is high.
Diagnostic support note
• This is a continuous monitor (Other).
• The MIL does not illuminate.
• PENDING CODE is available if the PCM detects the above malfunction condition during the first drive
cycle.
• FREEZE FRAME DATA is not available.
• DTCs are stored in the PCM memory.
POSSIBLE
CAUSE
• Wastegate control solenoid valve malfunction
• Connector or terminal malfunction
• Short to power supply in the wiring harness between wastegate control solenoid valve terminal B and PCM
terminal 2AA
• PCM malfunction
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED
• Has the 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
• Check for related Service Bulletins and/or on-
line 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
INSPECT WASTEGATE CONTROL SOLENOID
VALVE CONNECTOR FOR POOR CONNECTION
• Turn the ignition switch off.
• Disconnect the wastegate control solenoid
valve 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.
B
A
B
A
PCM
MAIN RELAY
5
4
3
3
2AA
WASTEGATE CONTROL SOLENOID VALVE
WIRING HARNESS-SIDE CONNECTOR
PCM
WIRING HARNESS-SIDE CONNECTOR
6
2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M
2E
2A
2I
2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P
2H
2D
2L
2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O
2G
2C
2K
2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z
2V 2R 2N
2F
2B
2J
1871-1U-06B(01-02).fm 114 ページ 2006年3月15日 水曜日 午前10時32分
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