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Mazda CX 7. Manual - part 21

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–39

01-02

End Of Sie

INSPECT HIGH PRESSURE FUEL PUMP
CONNECTOR FOR POOR CONNECTION

• Turn the ignition switch off.

• Disconnect the high pressure fuel pump

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.

Go to the next step.

INSPECT SPILL VALVE CONTROL SOLENOID
VALVE CONTROL CIRCUIT FOR SHORT TO
GROUND

• Turn the ignition switch off.

• Inspect for continuity between the following

terminals:
— High pressure fuel pump terminal A (wiring

harness-side) and body ground

— High pressure fuel pump terminal B (wiring

harness-side) and body ground

• Is there continuity?

Yes

Repair or replace the wiring harness for a possible short to
ground, then go to Step 8.

Go to the next step.

INSPECT SPILL VALVE CONTROL SOLENOID
VALVE

• Inspect the spill valve control solenoid valve.

(See01-14-19 HIGH PRESSURE FUEL
PUMP INSPECTION[L3 WITH TC].)

• Is there any malfunction.

Yes

Replace the high pressure fuel pump, then go to Step 8.
(See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)

Go to the next step.

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.

Go to the next step.

INSPECT SPILL VALVE CONTROL SOLENOID
VALVE CONTROL CIRCUIT FOR OPEN CIRCUIT

• Turn the ignition switch off.

• Inspect for continuity between the following

terminals:
— High pressure fuel pump terminal A (wiring

harness-side) and PCM terminal 2F (wiring
harness-side)

— High pressure fuel pump terminal B (wiring

harness-side) and PCM terminal 2G (wiring
harness-side)

• Is there continuity?

Yes

Go to the next step.

Repair or replace the wiring harness for a possible open
circuit, then go to the next step.

VERIFY TROUBLESHOOTING OF DTC P0091
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].)

Go to the next step.

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 inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

DTC troubleshooting completed.

STEP

INSPECTION

ACTION

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–40

DTC P0092[L3 WITH TC]

id010239802700

DTC P0092

Fuel pressure regulator control circuit high

DETECTION

CONDITION

• When the PCM turns the spill valve control solenoid valve on but the spill valve control solenoid valve circuit

voltage is high, the PCM determines that the spill valve control solenoid valve control circuit has
malfunction.

MONITORING CONDITIONS

— The following conditions are met:

• Engine speed is 3,000 rpm or less.

• Battery voltage is 10 V or more.

Diagnostic support note

• This is a continuous monitor (CCM).

• The MIL illuminates if the PCM detects the above malfunction condition during the first drive cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in the PCM memory.

POSSIBLE

CAUSE

• Spill valve control solenoid valve malfunction

• Connector or terminal malfunction

• Short to power supply in the wiring harness between high pressure fuel pump terminal B and PCM terminal

• PCM malfunction

PCM

HIGH PRESSURE FUEL PUMP

WIRING HARNESS-SIDE CONNECTOR

PCM

WIRING HARNESS-SIDE CONNECTOR

4 7

SPILL VALVE CONTROL

SOLENOID VALVE

(HIGH PRESSURE FUEL PUMP)

2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M

2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P

2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O

2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z

2V 2R 2N

1871-1U-06B(01-02).fm 40 ページ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–41

01-02

Diagnostic procedure

End Of Sie

STEP

INSPECTION

ACTION

VERIFY FREEZE FRAME DATA HAS BEEN
RECORDED

• Has the FREEZE FRAME DATA been

recorded?

Yes

Go to the next step.

Record the FREEZE FRAME DATA on the repair order,
then go to the next step.

VERIFY RELATED REPAIR INFORMATION
AVAILABILITY

• Verify related service repair information

availability.

• Is any related repair information available?

Yes

Perform the repair or diagnosis according to the available
repair information.

• If the vehicle is not repaired, go to the next step.

Go to the next step.

INSPECT HIGH PRESSURE FUEL PUMP
CONNECTOR FOR POOR CONNECTION

• Turn the ignition switch off.

• Disconnect the high pressure fuel pump

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.

Go to the next step.

INSPECT SPILL VALVE CONTROL SOLENOID
VALVE

• Inspect the spill valve control solenoid valve.

(See01-14-19 HIGH PRESSURE FUEL
PUMP INSPECTION[L3 WITH TC].)

• Is there any malfunction.

Yes

Replace the high pressure fuel pump, then go to Step 7.
(See01-14-16 HIGH PRESSURE FUEL PUMP REMOVAL/
INSTALLATION[L3 WITH TC].)

Go to the next step.

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 7.

Go to the next step.

INSPECT SPILL VALVE CONTROL SOLENOID
VALVE CONTROL CIRCUIT FOR SHORT TO
POWER SUPPLY

• Turn the ignition switch to the ON position

(Engine off).

• Measure the voltage between the following

terminals:
— High pressure fuel pump terminal A (wiring

harness-side) and body ground

— High pressure fuel pump terminal B (wiring

harness-side) and body ground

• Is the voltage B+?

Yes

Repair or replace the wiring harness for a possible short to
the power supply, then go to the next step.

Go to the next step.

VERIFY TROUBLESHOOTING OF DTC P0092
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].)

Go to the next step.

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 inspection.
(See01-02-13 DTC TABLE[L3 WITH TC].)

DTC troubleshooting completed.

1871-1U-06B(01-02).fm 41 ページ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–42

DTC P0096[L3 WITH TC]

id010239802800

DTC P0096

Boost air temperature sensor circuit range/performance problem

DETECTION

CONDITION

• If the intake air temperature is higher than the engine coolant temperature by 23 °C {41.4 °F} for 1.2 s with

the ignition switch turn to the ON position*, the PCM determines that there is a boost air temperature
sensor circuit range/performance problem.

*: Ignition switch on when 6 h or more has passed since the ignition switch was turned off

Diagnostic support note

• This is a continuous monitor (CCM).

• MIL illuminates if the 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 the PCM detects the above malfunction condition during first drive cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in the PCM memory.

POSSIBLE

CAUSE

• Boost air temperature sensor malfunction

• ECT sensor malfunction

• Connector or terminal malfunction

• PCM malfunction

2BE 2BA 2AW 2AS 2AO 2AK 2AG 2AC 2Y 2U 2Q 2M

2BH 2BD 2AZ 2AV 2AR 2AN 2AJ 2AF 2AB 2X 2T 2P

2BG 2BC 2AY 2AU 2AQ 2AM 2AI 2AE 2AA 2W 2S 2O

2BF 2BB 2AX 2AT 2AP 2AL 2AH 2AD 2Z

2V 2R 2N

2AV

PCM

BOOST AIR TEMPERATURE SENSOR

MAP/BOOST AIR TEMPERATURE SENSOR

WIRING HARNESS-SIDE CONNECTOR

PCM

WIRING HARNESS-SIDE CONNECTOR

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