Mazda CX 7. Manual - part 141

CONTROL SYSTEM [L3 WITH TC]

01-40-6–1

01-40

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

Revised 12/2006 (Ref. No. R215/06) 

01-40-6

CONTROL SYSTEM [L3 WITH TC]

WM: PCM

1. Verify that the PCM connector lever is tilted 

towards the wiring harness side as shown in the 
figure.

2. Insert the PCM connector straight until it contacts 

the PCM and verify that the lever reverts upward 
naturally.

3. Push the lever until a click is heard.

End Of Sie

PCM INSPECTION[L3 WITH TC]

id014039802500

Without Using the M-MDS

Note

• The PCM terminal voltage can vary with the conditions when measuring and changes due to aged 

deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the 
malfunction occurs among the input systems, output systems, and the PCM.

PCM inspection preparation 

1. Disconnect the negative battery cable.
2. Remove the battery and battery tray. (See 01-17-2 BATTERY REMOVAL/INSTALLATION[L3 WITH TC].)
3. Remove the windshield wiper arm and blade. (See09-19-3 WINDSHIELD WIPER ARM AND BLADE 

REMOVAL/INSTALLATION.)

4. Remove the cowl grille. (See09-16-11 COWL GRILLE REMOVAL/INSTALLATION.)
5. Remove the windshield wiper motor. (See09-19-6 WINDSHIELD WASHER MOTOR REMOVAL/

INSTALLATION.)

6. Remove the cowl panel. (See09-10-13 COWL PANEL REMOVAL/INSTALLATION.)
7. Remove the PCM bracket with the PCM connector still connected. (See01-40-6-1 Verify that the PCM 

connector lever is tilted towards the wiring harness side as shown in the figure..)

8. Connect the negative battery cable.

End Of Sie

LEVER

PCM CONNECTOR

PCM

WIRING 
HARNESS

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CONTROL SYSTEM [L3 WITH TC]

01-40-6–2

2007 Mazda CX-7 Workshop Manual (1871–1U–06B)

THIS PAGE INTENTIONALLY

LEFT BLANK

CONTROL SYSTEM [L3 WITH TC]

01-40–7

01-40

PCM terminal voltage table (Reference) 

Terminal

Signal

Connected to

Test condition

Voltage 

(V)

Inspection item

1A

— — 

— 

— 

— 

1B

Starter relay control Starter relay

Ignition switch off after 10 s

Below 1.0

• Starter relay

• Related wiring 

harness

Ignition switch to the ON position

Below 1.0

1C

— — 

— 

— 

— 

1D

— — 

— 

— 

— 

1E

— — 

— 

— 

— 

1F

— — 

— 

— 

— 

1G

— — 

— 

— 

— 

1H

Fuel pump control

Fuel pump relay

Ignition switch to the ON position 
after 10 s

B+

• Fuel pump relay

• Related wiring 

harness

Cranking

B+

Idle

Below 1.0

1I

A/C

A/C relay

Idle

A/C operating

Below 1.0

• A/C relay

• Related wiring 

harness

A/C not 
operating

B+

1J

Refrigerant 
pressure switch 
(middle)

Refrigerant 
pressure switch 
(middle)

A/C ON

Refrigerant 
pressure is 
more than the 
specification. 
(Refrigerant 
pressure switch 
(middle) is on.)

Below 1.0

• Refrigerant pressure 

switch

• Related wiring 

harness

Refrigerant 
pressure is less 
than the 
specification. 
(Refrigerant 
pressure switch 
(middle) is off.)

B+

1K

— — 

— 

— 

— 

1L

— — 

— 

— 

— 

1M

IAT

MAF/IAT sensor

Ignition switch 
to the ON 
position

IAT 20 

°C

{68 

°F}

2.4—2.6

• MAF/IAT sensor

• Related wiring 

harness

IAT 30 

°C

{86 

°F}

1.7—1.9

1N

— — 

— 

— 

— 

1O

— — 

— 

— 

— 

1P

MAF sensor ground MAF/IAT sensor

Under any condition

Below 1.0

• Related wiring 

harness

1Q

APP sensor voltage APP sensor

Ignition switch to the ON position

Approx. 

5.0

• Related wiring 

harness

• APP sensor

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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CONTROL SYSTEM [L3 WITH TC]

01-40–8

1R

Fan control module 
(No.2)

Fan control 
module No.2

Fan not operate

Below 1.0

• Fan control module 

No.2

• Related wiring 

harness

Fan operates

Approx. 

3.5

1S

— — 

— 

— 

— 

1T

— — 

— 

— 

— 

1U

APP sensor ground APP sensor

Under any condition

Below 1.0

• Related wiring 

harness

• APP sensor

1V

EVAP leak 
detection pump 
(solenoid)

EVAP leak 
detection pump

Ignition switch to the ON position

B+

• EVAP leak detection 

pump

• Related wiring 

harness

1W

— — 

— 

— 

— 

1X

— — 

— 

— 

— 

1Y

APP sensor (No.1)

APP sensor

Ignition switch 
to the ON 
position

When the 
accelerator 
pedal is 
released

1.56—

1.65

• APP sensor

• Related wiring 

harness

When the 
accelerator 
pedal is 
depressed 

3.65—

3.93

1Z

— — 

— 

— 

— 

1AA

Fuel pump control

Fuel pump relay

Ignition switch to the ON position 
after 10 s

B+

• Fuel pump relay

• Related wiring 

harness

Cranking

Below 1.0

Idle

Below 1.0

1AB

Brake (No.1)

Brake switch No.1

Brake pedal depressed

B+

• Brake switch No.1

• Related wiring 

harness

Brake pedal released

Below 1.0

1AC

APP sensor (No.2)

APP sensor (No.2)

Ignition switch 
to the ON 
position

When the 
accelerator 
pedal is 
released 

1.01—

1.10

• APP sensor

• Related wiring 

harness

When the 
accelerator 
pedal is 
depressed

3.10—

3.38

1AD

— — 

— 

— 

— 

1AE

Fan control module 
(No.1)

Fan control 
module No.1

• Inspect using the wave profile.

(See01-40-6 PCM inspection 
preparation.)

• Fan control module 

No.1

• Related wiring 

harness

1AF

Brake (No.2)

Brake switch No.2

Brake pedal depressed

B+

• Brake switch No.2

• Related wiring 

harness

Brake pedal released

Below 1.0

1AG

— — 

— 

— 

— 

1AH

— — 

— 

— 

— 

1AI

CAN (L)

CAN related 
module

Because this terminal is for CAN, no valid 
determination of terminal voltage is possible

• Related wiring 

harness

1AJ

Constant voltage

APP sensor

Ignition switch to the ON position

Approx. 

5.0

• Related wiring 

harness

1AK

MAF

MAF/IAT sensor

Ignition switch to the ON position

Approx. 

0.7

• MAF/IAT sensor

• Related wiring 

harness

Idle

Approx. 

1.3

1AL

— — 

— 

— 

— 

1AM

CAN (H)

CAN related 
module

Because this terminal is for CAN, no valid 
determination of terminal voltage is possible

• Related wiring 

harness

1AN

— — 

— 

— 

— 

Terminal

Signal

Connected to

Test condition

Voltage 

(V)

Inspection item

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