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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1871-1U-06B(01-40).fm 7 ページ ２００６年３月１５日 水曜日 午前１０時５３分

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

1871-1U-06B(01-40).fm 8 ページ ２００６年３月１５日 水曜日 午前１０時５３分