Mazda CX 7. Manual - part 56

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–179

01-02

Diagnostic procedure

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

CLASSIFY INTERMITTENT CONCERN OR 
CONTINUOUS CONCERN

• Clear the DTC from the PCM memory using 

the M-MDS.

• 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

Go to the next step.

No

Intermittent concern exists. Go to INTERMITTENT 
CONCERN TROUBLESHOOTING procedure.
 (See01-03-76 INTERMITTENT CONCERN 
TROUBLESHOOTING[L3 WITH TC].)

4

VERIFY IF STORED OTHER DTCs STORED

• Verify stored DTCs using the M-MDS.

• Is DTC P2088 or P2089 present?

Yes

Go to the appropriate DTC troubleshooting procedures.

No

Go to the next step.

5

INSPECT VARIABLE SWIRL SOLENOID VALVE

• Perform “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 variable swirl solenoid valve, then go to Step 13.

6

INSPECT VARIABLE SWIRL SHUTTER VALVE 
ACTUATOR

• Perform “VARIABLE SWIRL SHUTTER VALVE 

ACTUATOR INSPECTION”.
 (See01-13-13 VARIABLE SWIRL SHUTTER 
VALVE ACTUATOR INSPECTION[L3 WITH 
TC].)

• Is the variable swirl shutter valve actuator 

normal?

Yes

Go to the next step.

No

Replace the intake manifold, then go to Step 13.

7

INSPECT VARIABLE SWIRL SHUTTER VALVE 
SWITCH

• Perform the “VARIABLE SWIRL SHUTTER 

VALVE SWITCH INSPECTION”.
 (See01-13-13 VARIABLE SWIRL SHUTTER 
VALVE ACTUATOR INSPECTION[L3 WITH 
TC].)

• Is the variable swirl shutter valve switch 

normal?

Yes

Go to the next step.

No

Replace the intake manifold, then go to Step 13.

8

VERIFY CONNECTION OF VACUUM HOSE 
ROUTING

• Verify that the vacuum hoses are connected 

properly.

• Are the vacuum hoses connected properly?

Yes

Go to the next step.

No

Connect the vacuum hoses properly, then go to the next 
step.

1871-1U-06B(01-02).fm  179 ページ  ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–180

9

INSPECT VARIABLE SWIRL SOLENOID VALVE 
OR VARIABLE SWIRL SHUTTER VALVE 
SWICTH CONNECTOR FOR POOR 
CONNECTION

• Turn the ignition switch to off.

• Disconnect the variable swirl solenoid valve 

connector and variable swirl shutter valve 
switch 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 13.

No

Go to the next step.

10

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

• Turn the ignition switch to 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 13.

No

Go to the next step.

11

INSPECT VARIABLE SWIRL SOLENOID VALVE 
OR VARIABLE SWIRL SHUTTER VALVE SW 
SIGNAL CIRCUIT FOR OPEN CIRCUIT

• Inspect for continuity between the following 

terminals:

— Variable swirl solenoid valve terminal B 

(harness-side) and PCM terminal 2AS 
(harness-side).

— Variable swirl shutter valve sw terminal A 

(harness-side) and PCM terminal 2AE 
(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 Step 13.

12

INSPECT VARIABLE SWIRL SOLENOID VALVE 
OR VARIABLE SWIRL SHUTTER VALVE 
SWITCH CIRCUIT FOR SHORT TO POWER 
SUPPLY

• Disconnect the variable swirl solenoid valve 

connector and variable swirl shutter valve 
switch connector.

• Turn ignition switch to the ON position (Engine 

off).

• Measure the voltage between the following 

terminals and body ground.

— PCM terminal 2AS (harness-side).

— PCM terminal 2AE (harness-side).

• Is the voltage B+?

Yes

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

No

Go to the next step.

13

VERIFY TROUBLESHOOTING OF DTC P2004 
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 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 the PCM, then go to the next step.
 (See01-40-6 PCM INSPECTION[L3 WITH TC].)

No

Go to the next step.

14

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

1871-1U-06B(01-02).fm  180 ページ  ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–181

01-02

End Of Sie

DTC P2006[L3 WITH TC]

id010239810300

DTC P2006

Variable swirl control system shutter valve stuck closed

DETECTION 

CONDITION

• PCM monitors the mass variable swirl shutter valve position using the variable swirl shutter valve switch. If 

PCM turns the variable swirl solenoid valve off but the variable swirl position still remains closed (variable 
swirl shutter valve switch is off), the PCM determines that the variable swirl shutter valve is stuck closed.

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

• ECT sensor malfunction

• TP sensor malfunction

• CKP sensor malfunction

• Connector or terminal malfunction

• Variable swirl solenoid valve malfunction

• Variable swirl shutter valve malfunction (stuck closed)

• Variable swirl shutter valve actuator malfunction (stuck closed).

• Short to ground circuit between variable swirl solenoid valve terminal B and PCM terminal 2AS

• Short to ground in the wiring harness between variable swirl shutter valve switch terminal A and PCM 

terminal 2AE

• PCM malfunction

PCM

WIRING HARNESS SIDE CONNECTOR

1BE 1BA 1AW 1AS 1AO 1AK 1AG 1AC 1Y 1U 1Q 1M

1E

1A

1I

1BH 1BD 1AZ 1AV 1AR 1AN 1AJ 1AF 1AB 1X

1T

1P

1H

1D

1L

1BG 1BC 1AY 1AU 1AQ 1AM 1AI 1AE 1AA 1W 1S 1O

1G

1C

1K

1BF 1BB 1AX 1AT 1AP 1AL 1AH 1AD 1Z

1V

1R 1N

1F

1B

1J

B

A

VARIABLE SWIRL SOLENOID VALVE

WIRING HARNESS SIDE CONNECTOR

MAIN RELAY

PCM

7

7

6

9

8

A

B

VARIABLE SWIRL SHUTTER VALVE SWITCH

VARIABLE SWIRL SHUTTER VALVE SWITCH

WIRING HARNESS SIDE CONNECTOR

7

7

8

9

2AS

2AE

VARIABLE SWIRL 

SOLENOID VALVE

A

B

A

B

1871-1U-06B(01-02).fm  181 ページ  ２００６年３月１５日　水曜日　午前１０時３２分

ON-BOARD DIAGNOSTIC [L3 WITH TC]

01-02–182

Diagnostic procedure

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

CLASSIFY INTERMITTENT CONCERN OR 
CONTINUOUS CONCERN

• Clear the DTC from the PCM memory using 

the M-MDS.

• Drive the vehicle under 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

Go to the next step.

No

Intermittent concern exists. Go to INTERMITTENT 
CONCERN TROUBLESHOOTING procedure.
 (See01-03-76 INTERMITTENT CONCERN 
TROUBLESHOOTING[L3 WITH TC].)

4

VERIFY STORED OTHER DTCS

• Verify stored DTCs using M-MDS or 

equipment.

• Is other DTC present except P0117, P0118, 

P0121, P0122, P0123 and/or P0335?

Yes

Go to appropriate DTC troubleshooting procedures.

No

Go to the next step.

5

INSPECT VARIABLE SWIRL SHUTTER VALVE 
ACTUATOR

• Perform the “Variable Swirl System Operation 

Inspection”.
 (See01-03-78 ENGINE CONTROL SYSTEM 
OPERATION INSPECTION[L3 WITH TC].)

• Is the variable swirl shutter valve actuator 

normal?

Yes

Go to the next step.

No

Replace the variable swirl shutter valve actuator, then go to 
Step 10.

6

INSPECT VARIABLE SWIRL SOLENOID VALVE

• Perform the “variable swirl solenoid valve 

airflow 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 
10.

7

INSPECT VARIABLE SWIRL SOLENOID VALVE 
OR VARIABLE SWIRL SHUTTER VALVE 
SWITCH CONNECTOR FOR POOR 
CONNECTION

• Turn the ignition switch to off.

• Disconnect the variable swirl solenoid valve 

connector and the variable swirl shutter valve 
switch connector.

• Inspect for poor connection (such as damaged/

pulled-out pins, corrosion).

• Is there any malfunction?

Yes

Repair the terminal, then go to Step 10.

No

Go to the next step.

8

INSPECT PCM CONNECTOR FOR POOR 
CONNECTION

• Inspect for poor connection at the PCM 

terminals (such as damaged, pulled-out 
terminals, corrosion).

• Is there any malfunction?

Yes

Repair terminal, then go to Step 10.

No

Go to the next step.

1871-1U-06B(01-02).fm  182 ページ  ２００６年３月１５日　水曜日　午前１０時３２分