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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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