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2008 - MX-5 - Transmission/Transaxle

TCM INSPECTION [SJ6A-EL]

Terminal Voltage Table (Reference)

NOTE:



Terminal

Signal

Connected to

Test Condition

Voltage (V)

Action

1A

—

—

—

—

—

1B

—

—

—

—

—

1C

CAN_L

PCM

Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.

—

  • Inspect the related wiring harness

1D

TCC control solenoid GND

TCC control solenoid

1E

Line pressure control solenoid GND

Line pressure control solenoid

P, N position, Idle

Below 1.0

1F

—

—

—

—

—

1G

CAN_H

PCM

Because this terminal is for serial communication, good/no good judgment by terminal voltage is not possible. Carry out inspection according to DTCs.

—

  • Inspect the related wiring harness

1H

—

—

—

—

—

1I

—

—

—

—

—

1J

ATF temperature (+)

TFT sensor

ATF temperature 20°C {68°F}

Approx. 3.0

ATF temperature 40°C {104°F}

Approx. 2.14

ATF temperature 60°C {140°F}

Approx. 1.38

1K

—

—

—

—

—

1L

Shift solenoid G GND

Shift solenoid G

1M

TFT sensor GND

TFT sensor

Under any condition

Continuity

  • Inspect the related wiring harness

1N

—

—

—

—

—

1O

Shift solenoid F GND

Shift solenoid F

1P

System GND

GND

Under any condition

Continuity

  • Inspect the related wiring harness

1Q

TCC control solenoid control

TCC control solenoid

1R

Line pressure control solenoid control

Line pressure control solenoid

1S

Shift solenoid D control

Shift solenoid D

5GR, 6GR

B+

1GR, 2GR, 3GR, 4GR

Below 1.0

1T

—

—

—

—

—

1U

—

—

—

—

—

1V

Shift solenoid E control

Shift solenoid E

1GR, 2GR, 3GR, 4GR

B+

5GR, 6GR

Below 1.0

1W

—

—

—

—

—

1X

System GND

GND

Under any condition

Continuity

  • Inspect the related wiring harness

1Y

Shift solenoid G control

Shift solenoid G

1Z

Shift solenoid F control

Shift solenoid F

1AA

Shift solenoid C control

Shift solenoid C

1GR, 2GR, 3GR

B+

4GR, 5GR, 6GR

Below 1.0

1AB

Shift solenoid B control

Shift solenoid B

1GR, 2GR, 6GR

B+

3GR, 4GR, 5GR

Below 1.0

1AC

—

—

—

—

—

1AD

Power supply

Battery

Constant

B+

  • Inspect the related wiring harness

1AE

IG

Ignition switch

Ignition switch ON

B+

Ignition switch OFF

(See SOLENOID VALVE INSPECTION [SJ6A-EL])

Below 1.0

1AF

Shift solenoid A control

Shift solenoid A

2GR, 3GR, 4GR, 5GR, 6GR

B+

1GR

Below 1.0

1AG

—

—

—

—

—

1AH

—

—

—

—

—

1AI

IG

Ignition switch

Ignition switch ON

B+

Ignition switch OFF

Below 1.0

2A

Turbine speed (+)

Turbine sensor

2B

Turbine speed (-)

Turbine sensor

Ignition switch ON

Approx. 2.54

2C

Vehicle speed (-)

VSS

Ignition switch ON

Approx. 2.5

2D

Vehicle speed (+)

VSS

2E

Turbine sensor wiring harness shield GND

GND

Under any condition

Continuity

  • Inspect the related wiring harness

2F

Down switch

(Selector lever component)

Down switch

(Selector lever component)

Shift down

(M range)

Below 1.0

Other ranges, all positions

B+

2G

M range switch

M range switch

M range

Below 1.0

Other positions, all ranges

B+

2H

VSS wiring harness shield GND

GND

Under any condition

Continuity

  • Inspect the related wiring harness

2I

—

—

—

—

—

2J

Up switch

(Selector lever component)

Up switch

(Selector lever component)

Shift up

(M range)

Below 1.0

Other ranges, all positions

B+

2K

TR switch

(D range)

TR switch

D range

B+

Other ranges, all positions

Below 1.0

2L

—

—

—

—

—

2M

TR switch

(R position)

TR switch

R position

B+

Other ranges, all positions

Below 1.0

2N

TR switch

(N position)

TR switch

N position

B+

Other positions, all ranges

Below 1.0

2O

TR switch

(P position)

TR switch

P position

B+

Other positions, all ranges

Below 1.0

2P

—

—

—

—

—

2Q

ATF temperature monitor mode control

TFT check connector

Under any condition

B+

  • Inspect the related wiring harness

2R

—

—

—

—

—

2S

—

—

—

—

—

2T

—

—

—

—

—

2U

—

—

—

—

—

2V

—

—

—

—

—

2W

—

—

—

—

—

2X

—

—

—

—

—

2Y

—

—

—

—

—

2Z

—

—

—

—

—

2AA

—

—

—

—

—

2AB

Steering shift switch GND

Steering shift switch

Under any condition

Below 1.0

  • Inspect the related wiring harness

2AC

—

—

—

—

—

2AD

—

—

—

—

—

2AE

—

—

—

—

—

2AF

Shift up/Shift down signal

(Steering shift switch)

Steering shift switch

Up switch operated

(Steering shift switch)

Approx. 2.0

Down switch operated

(Steering shift switch)

Approx. 2.53

Others

Approx. 4.0

2AG

—

—

—

—

—

2AH

—

—

—

—

—

2AI

—

—

—

—

—


Inspection Using An Oscilloscope (Reference)

Turbine sensor (+)
Vehicle speed (+)
Shift solenoid F control (+)
Shift solenoid F control (-)
Shift solenoid G control (+)
Shift solenoid G control (-)
TCC control solenoid control (+)
TCC control solenoid control (-)
Line pressure control solenoid control (+)


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