Mazda CX 7. Manual — part 57

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–183

01-02

End Of Sie

9

INSPECT VARIABLE SWIRL SOLENOID VALVE
OR VARIABLE SWIRL SHUTTER VALVE
SWITCH SIGNAL CIRCUIT FOR SHORT TO
GROUND

• Inspect for continuity between the following

terminals and body ground.

— PCM terminal 2AS (harness-side).

— PCM terminal 2AE (harness-side).

• Is there continuity?

Yes

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

No

Go to the next step.

10

VERIFY TROUBLESHOOTING OF DTC P2006
COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Start the engine.

• Clear the DTC from the PCM memory using

the M-MDS.

• Start the engine.

• Drive the vehicle under the following

conditions:
— Engine coolant temperature is above 63

°C

{145

°F}.

— Engine speed: below 3,750 rpm

— Throttle opening angle is as follows:

• Engine speed below 1,500 rpm: above

35%

• Engine speed between 1,500— 2,500

rpm: between 25— 35%

• Engine speed above 2,500: below 25%

• Is the PENDING CODE for this DTC present?

Yes

Replace PCM, then go to the next step.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

No

Go to the next step.

11

VERIFY AFTER REPAIR PROCEDURE

• Perform the “After Repair Procedure”.

(See01-14-4 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].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–184

DTC P2009[L3 WITH TC]

id010239810400

Diagnostic procedure

DTC P2009

Variable swirl solenoid valve control circuit low

DETECTION

CONDITION

• PCM monitors the variable swirl solenoid valve control signal. If the PCM turns variable swirl solenoid valve

off but the voltage still remains low, the PCM determines that the variable swirl solenoid valve control circuit
has a malfunction.

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 the first drive

cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in PCM memory.

POSSIBLE

CAUSE

• Poor connection of connectors at PCM and/or variable swirl solenoid valve

• Short to ground in the wiring harness between variable swirl solenoid valve terminal B and PCM terminal

2AS

• Open circuit in the wiring harness between main relay and variable swirl solenoid valve terminal A

• Open circuit in the wiring harness between variable swirl solenoid valve terminal B and PCM terminal 2AS

• Variable swirl solenoid valve malfunction

• 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 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 the 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 VARIABLE SWIRL SOLENOID VALVE
CONNECTOR FOR POOR CONNECTION

• Turn the ignition switch off.

• 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 9.

No

Go to the next step.

A

B

PCM

VARIABLE SWIRL SOLENOID VALVE

WIRING HARNESS SIDE CONNECTOR

VARIABLE SWIRL

SOLENOID VALVE

MAIN RELAY

5

7

6

4

3

3

8

2AS

A

B

PCM

WIRING HARNESS SIDE CONNECTOR

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

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ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–185

01-02

End Of Sie

4

INSPECT VARIABLE SWIRL SOLENOID VALVE

• Perform the variable swirl solenoid valve

inspection.
(See01-13-13 VARIABLE SWIRL SOLENOID
VALVE INSPECTION[L3 WITH TC].)

• Is the variable swirl solenoid valve normal?

Yes

Go to the next step.

No

Replace the variable swirl solenoid valve, then go to Step 9.

5

INSPECT VARIABLE SWIRL SOLENOID VALVE
POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

• Disconnect the variable swirl solenoid valve

connector.

• Turn ignition switch to the ON position (Engine

off).

• Measure voltage between variable swirl

solenoid valve terminal A (harness-side) and
body ground.

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness for an open circuit,
then go to Step 9.

6

INSPECT PCM CONNECTOR FOR POOR
CONNECTION

• Turn the ignition switch off.

• Disconnect the PCM connector.

• Inspect for poor connection at PCM terminal

2AS. (such as damaged, pulled-out pins,
corrosion).

• Is there any malfunction?

Yes

Repair terminal, then go to Step 9.

No

Go to the next step.

7

INSPECT VARIABLE SWIRL SOLENOID VALVE
CONTROL CIRCUIT FOR SHORT TO GROUND

• Inspect for continuity between variable swirl

solenoid valve terminal B (harness-side) and
body ground.

• Is there continuity?

Yes

Repair or replace the wiring harness for a short to ground,
then go to Step 9.

No

Go to the next step.

8

INSPECT VARIABLE SWIRL SOLENOID VALVE
CONTROL CIRCUIT FOR OPEN CIRCUIT

• Connect variable swirl solenoid valve

connector.

• Turn ignition switch to the ON position (Engine

off).

• Measure the voltage between PCM terminal

2AS (harness-side) and body ground.

• Is the voltage B+?

Yes

Go to the next step.

No

Repair or replace the wiring harness for an open or short to
ground circuit, then go to the next step.

9

VERIFY TROUBLESHOOTING OF DTC P2009
COMPLETED

• Make sure to reconnect all disconnected

connectors.

• Clear the DTC from the PCM memory using

the M-MDS.

• Turn the ignition switch off.

• 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.
(See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH
TC].)

No

Go to the next step.

10

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].)

No

Troubleshooting completed.

STEP

INSPECTION

ACTION

1871-1U-06B(01-02).fm 185 ページ ２００６年３月１５日 水曜日 午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–186

DTC P2010[L3 WITH TC]

id010239810500

DTC P2010

Variable swirl solenoid valve control circuit high

DETECTION

CONDITION

• PCM monitors the variable swirl solenoid valve control signal. If the PCM turns variable swirl solenoid valve

on but the voltage still remains high, the PCM determines that the variable swirl solenoid valve control
circuit has a malfunction.

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 the first drive

cycle.

• FREEZE FRAME DATA is available.

• DTCs are stored in PCM memory.

POSSIBLE

CAUSE

• Poor connection of connectors at the PCM and/or the variable swirl solenoid valve

• Short to the power supply in the wiring harness between variable swirl solenoid valve terminal B and PCM

terminal 2AS

• Variable swirl solenoid valve malfunction

• PCM malfunction

B

A

VARIABLE SWIRL SOLENOID VALVE

WIRING HARNESS SIDE CONNECTOR

MAIN RELAY

VARIABLE SWIRL

SOLENOID VALVE

PCM

4

5

3

3

6

2AS

A

B

PCM

WIRING HARNESS SIDE CONNECTOR

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 186 ページ ２００６年３月１５日 水曜日 午前１０時３２分