Mazda CX 7. Manual - part 145

CONTROL SYSTEM [L3 WITH TC]

01-40–21

01-40

*

1

: California emission regulation applicable model

End Of Sie

PCM CONFIGURATION[L3 WITH TC]

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1. Connect the M-MDS to DLC-2.
2. After the vehicle is identified, select the following 

items from the initial screen of the M-MDS.

• When using the IDS (notebook PC)

1. Select the “Module Programming”.

• When using the PDS (pocket PC)

1. Select “Programming”.
2. Select “Module Programming”.

3. Then, select the “Programmable Module 

Installation”, “PCM” from the screen menu.

Note

• If the PCM is replaced with a new one, the 

PCM stores DTC P0602, illuminates the MIL 
even though no malfunction is detected. When the configuration is completed, DTC P0602 is cleared.

4. Retrieve DTC’s using the M-MDS, then verify that DTC are present.

• If a DTC is present, perform the applicable DTC inspection.

End Of Sie

TP REL (Relative TP)

%

Ignition switch to the ON position
APP is released: Approx. 5%
APP is depressed: Approx. 46 %

• TP sensor

2AK

2AL

TP1 (TP sensor 1)

%

Ignition switch to the ON position
APP is released: Approx. 15%
APP is depressed: Approx. 55 %

• TP sensor

2AK

V

Ignition switch to the ON position
APP is released: 0.4— 0.6 V
APP is depressed: 4.7— 4.9 V

TP2 (TP sensor 2)

%

Ignition switch to the ON position
APP is released: Approx. 15%
APP is depressed: Approx. 56%

• TP sensor

2AL

V

Ignition switch to the ON position
APP is released: 4.4— 4.6 V
APP is depressed: 0.1— 0.3 V

TPCT
(Lowest closed throttle 
voltage)

V

Ignition switch to the ON position: 
Approx 1.0 V

• TP sensor

2AK

2AL

VPWR (Battery 
positive voltage)

V

Indicate the battery voltage

• Battery

1BA

VSS (Vehicle speed)

KPH

MPH Indicate the vehicle speed

• Perform applicable DTC 

troubleshooting.

— 

VT ACT1 (Actual valve 
timing)

°

Idle: Approx. 0

°

• The following PIDs:

— TP, ECT, RPM

• OCV

— 

VT DIFF1 (Difference 
between actual valve 
timing and target valve 
timing)

°

Idle: Approx. 0

°

• The following PIDs:

— TP, ECT, RPM

• OCV

2AF

VT DUTY1

%

Idle: Approx. 11.5%

• The following PIDs:

— TP, ECT, RPM

• OCV

2AF

VTC

On/Off

Variable swirl shutter valve switch 
ON: On

• Variable swirl shutter valve switch

2AE

Variable swirl shutter valve switch 
OFF: Off

WGC

%

Racing with the accelerator pedal 
fully depressed: 10— 100 %

• Wastegate control solenoid valve

2AA

Fully closed: 0 %

Monitor item 

(Definition)

Unit/

Condition

Condition/Specification 

(Reference)

Inspection item

PCM 

terminal

DLC-2

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CONTROL SYSTEM [L3 WITH TC]

01-40–22

WM: POWER STEERING PRESSURE SWITCH

POWER STEERING PRESSURE (PSP) SWITCH INSPECTION[L3 WITH TC]

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Note

• Before performing the following inspection, make sure to follow the procedure as indicated in the 

troubleshooting flowchart. (See 00-00-3 HOW TO USE THIS MANUAL.)

Continuity Inspection

1. Inspect the following if the power steering is inoperative (See06-14-3 POWER STEERING FLUID 

INSPECTION.):

• Power steering fluid level

• Power steering fluid leakage

• Power steering fluid pressure

2. Disconnect the PSP switch connector.
3. Start the engine.
4. Inspect for continuity between the PSP switch terminal and ground using a tester.

• If not as specified, replace the PSP switch. (See06-14-21 POWER STEERING OIL PUMP REMOVAL/

INSTALLATION.)

• If the PSP switch is normal, but PID value is out of specification, perform the “Circuit Open/Short 

Inspection”.

Specification

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following harnesses for an open or short circuit. (Continuity check)

Open circuit

• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

— PSP switch terminal and PCM terminal 2T

Short circuit

• If there is no continuity, there is a short circuit. Repair or replace the wiring harness.

— PSP switch terminal and body ground

Steering wheel in straight
ahead position

While turning steering
wheel

Terminal

GND

: Continuity

Condition

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A

PSP SWITCH

WIRING HARNESS SIDE CONNECTOR

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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

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

PCM

WIRING HARNESS-SIDE CONNECTOR

acxuuw00000118

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CONTROL SYSTEM [L3 WITH TC]

01-40–23

01-40

End Of Sie
WM: SHUTTER VALVE SWITCH

VARIABLE SWIRL SHUTTER VALVE SWITCH INSPECTION[L3 WITH TC]

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Note

• Before performing the following inspection, make sure to follow the procedure as indicated in the 

troubleshooting flowchart. (See00-00-3 HOW TO USE THIS MANUAL.)

Voltage Inspection

1. Turn the ignition switch to the ON position (Engine off).
2. Verify that the PCM terminal 2AE voltage is as 

shown in the following table when the variable 
swirl shutter valve actuator rod is depressed and 
released by hand.

• If not as specified, perform the “Circuit Open/Short Inspection”.

— If there is no open or short circuit, replace the intake manifold. (See01-13-5 INTAKE AIR SYSTEM 

REMOVAL/INSTALLATION[L3 WITH TC].)

Variable swirl shutter valve switch output voltage

OPEN POSITION
(RELEASED)

CLOSED POSITION
(DEPRESSED)

VARIABLE SWIRL SHUTTER VALVE 
ACTUATOR ROD

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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

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

PCM

WIRING HARNESS-SIDE CONNECTOR

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Condition

PCM terminal 2AE

Released (Open position)

B+

Depressed (Closed position)

Below 1.0 V

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CONTROL SYSTEM [L3 WITH TC]

01-40–24

Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See01-40-6 PCM REMOVAL/INSTALLATION[L3 WITH TC].)
2. Inspect the following harnesses for an open or short circuit. (Continuity check)

Open circuit

• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

— Variable swirl shutter valve switch terminal A and PCM terminal 2AE

— Variable swirl shutter valve switch terminal B and body ground.

Short circuit

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.

— Variable swirl shutter valve switch terminal A and power supply

— Variable swirl shutter valve switch terminal A and body ground

— Variable swirl shutter valve switch terminal B and power supply

End Of Sie

WM: TEMPERATURE SENSOR

ENGINE COOLANT TEMPERATURE (ECT) SENSOR REMOVAL/INSTALLATION[L3 WITH TC]

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Warning

• A hot engine can cause severe burns. Turn off the engine and wait until it is cool before removing 

the ECT sensor.

1. Disconnect the negative battery cable.
2. Remove the charge air cooler duct. (See 01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH 

TC].)

3. Remove the battery and battery tray. (See 01-17-2 BATTERY REMOVAL/INSTALLATION[L3 WITH TC].)
4. Remove the air cleaner and air hose. (See01-13-5 INTAKE AIR SYSTEM REMOVAL/INSTALLATION[L3 WITH 

TC].)

5. Drain the engine coolant. (See01-12-2 COOLING SYSTEM SERVICE WARNINGS[L3 WITH TC].)
6. Disconnect the wiring harness.

A

B

VARIABLE SWIRL SHUTTER VALVE SWITCH 

WIRING HARNESS SIDE CONNECTOR

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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

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

PCM

WIRING HARNESS-SIDE CONNECTOR

acxuuw00000114

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