WIRING DIAGRAM Z — H-1,2 Terminal Voltage Chart (TCM)

Z-92spec tableUnverified

Terminal voltage chart applies to both H-1 (B6) and H-2 (K8) EC-AT control modules.

Terminal Voltage Chart

NOTE

B+: Battery positive voltage. * Checked in AC range.

Terminal Voltage Chart — Left column

Terminal	Connected to	Voltmeter + terminal	Voltmeter − terminal	Voltage	Condition
1A (Output)	Engine control module (Reduce torque signal 2)	1A	Ground	Below 5 V	D, S or L range and downshifting (except 4→3 or 3→2) with throttle valve opening 6/8 or more
1A (Output)				B+	Others
1B (Output)	HOLD indicator light	1B	Ground	0 V	HOLD mode
1B (Output)				B+	NORMAL mode
1C (Input)	FAT terminal (Data link connector)	1C	Ground	0 V	HOLD mode
1C (Input)				B+	NORMAL mode
1C (Input)				0 V Approx. B+ (fluctuating)	IAT malfunction sensed
1C (Input)				(Code signal)	IAT terminal grounded
1D (Input)	Engine control module (Park / neutral position signal)	1D	Ground	Below 1.5 V	P or N position
1D (Input)				B+	R position, All ranges
1E (Input)	TAT terminal (Data link connector)	1E	Ground	B+	Normal
1E (Input)				0 V	TAT terminal grounded
1F (Input)	Brake switch	1F	Ground	B+	Brake pedal depressed
1F (Input)				0 V	Brake pedal released
1G (Input)	Transaxle fluid temperature sensor	1G	Ground	Approx. 4.06 V—1.12 V Approx. 1.6 V Approx. 0.6 V	While warming-up ATF Note: ATF temp. 20°C (68°F); ATF temp. 120°C (248°F)
1H (Input)	HOLD switch	1H	Ground	B+ 0 V	Switch depressed point / Switch released point
1I	—	—	—	—	—
1J (Ground)	Battery ground	1J	Ground	0 V	Constant
1K (Memory power)	Battery	1K	Ground	B+	Ignition switch ON
1K (Memory power)				B+	Ignition switch OFF
1L	—	—	—	—	—
1N (Input)	Engine control module (Torque reduced signal / water thermo signal)	1N	Ground	Above 60°C (140°F): 0 V; Below 60°C (140°F): B+	Torque reduction
1O (Input)	Closed throttle position switch	1O	Ground	0 V	Closed throttle position switch ON (Closed throttle position)
1O (Input)				B+	Closed throttle position switch OFF (Throttle valve open)
1P (Input)	Vehicle speed sensor	1P	Ground	3 V—4 V; 0 V or 5 V→0 V	While driving / Vehicle stopped

1A (Output)

Connected toEngine control module (Reduce torque signal 2)

Voltmeter + terminal1A

Voltmeter − terminalGround

VoltageBelow 5 V

ConditionD, S or L range and downshifting (except 4→3 or 3→2) with throttle valve opening 6/8 or more

1A (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionOthers

1B (Output)

Connected toHOLD indicator light

Voltmeter + terminal1B

Voltmeter − terminalGround

Voltage0 V

ConditionHOLD mode

1B (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionNORMAL mode

1C (Input)

Connected toFAT terminal (Data link connector)

Voltmeter + terminal1C

Voltmeter − terminalGround

Voltage0 V

ConditionHOLD mode

1C (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionNORMAL mode

1C (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V Approx. B+ (fluctuating)

ConditionIAT malfunction sensed

1C (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage(Code signal)

ConditionIAT terminal grounded

1D (Input)

Connected toEngine control module (Park / neutral position signal)

Voltmeter + terminal1D

Voltmeter − terminalGround

VoltageBelow 1.5 V

ConditionP or N position

1D (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionR position, All ranges

1E (Input)

Connected toTAT terminal (Data link connector)

Voltmeter + terminal1E

Voltmeter − terminalGround

VoltageB+

ConditionNormal

1E (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionTAT terminal grounded

1F (Input)

Connected toBrake switch

Voltmeter + terminal1F

Voltmeter − terminalGround

VoltageB+

ConditionBrake pedal depressed

1F (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionBrake pedal released

1G (Input)

Connected toTransaxle fluid temperature sensor

Voltmeter + terminal1G

Voltmeter − terminalGround

VoltageApprox. 4.06 V—1.12 V Approx. 1.6 V Approx. 0.6 V

ConditionWhile warming-up ATF Note: ATF temp. 20°C (68°F); ATF temp. 120°C (248°F)

1H (Input)

Connected toHOLD switch

Voltmeter + terminal1H

Voltmeter − terminalGround

VoltageB+ 0 V

ConditionSwitch depressed point / Switch released point

Connected to—

Voltmeter + terminal—

Voltmeter − terminal—

Voltage—

Condition—

1J (Ground)

Connected toBattery ground

Voltmeter + terminal1J

Voltmeter − terminalGround

Voltage0 V

ConditionConstant

1K (Memory power)

Connected toBattery

Voltmeter + terminal1K

Voltmeter − terminalGround

VoltageB+

ConditionIgnition switch ON

1K (Memory power)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionIgnition switch OFF

Connected to—

Voltmeter + terminal—

Voltmeter − terminal—

Voltage—

Condition—

1N (Input)

Connected toEngine control module (Torque reduced signal / water thermo signal)

Voltmeter + terminal1N

Voltmeter − terminalGround

VoltageAbove 60°C (140°F): 0 V; Below 60°C (140°F): B+

ConditionTorque reduction

1O (Input)

Connected toClosed throttle position switch

Voltmeter + terminal1O

Voltmeter − terminalGround

Voltage0 V

ConditionClosed throttle position switch ON (Closed throttle position)

1O (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionClosed throttle position switch OFF (Throttle valve open)

1P (Input)

Connected toVehicle speed sensor

Voltmeter + terminal1P

Voltmeter − terminalGround

Voltage3 V—4 V; 0 V or 5 V→0 V

ConditionWhile driving / Vehicle stopped

Terminal Voltage Chart — Right column

Terminal	Connected to	Voltmeter + terminal	Voltmeter − terminal	Voltage	Condition
2A (Input)	Throttle position sensor (Vapor)	2A	Ground	4.5 V—5.5 V	Ignition switch ON
2A (Input)				0 V	Ignition switch OFF
2B (Input)	Transaxle range switch (P or N position)	2B	Ground	0 V	P or N position
2B (Input)				B+	R position, All ranges
2C	—	—	—	—	—
2D (Input)	Transaxle range switch (D range)	2D	Ground	B+	D range
2D (Input)				0 V	Other ranges, All positions
2E (Output)	Shift solenoid A	2E	Ground	B+	Solenoid valve ON
2E (Output)				0 V	Solenoid valve OFF
2F (Input)	Transaxle range switch (S range)	2F	Ground	B+	S range
2F (Input)				0 V	Other ranges, All positions
2G (Output)	Shift solenoid B	2G	Ground	B+	Solenoid valve ON
2G (Output)				0 V	Solenoid valve OFF
2H (Input)	Transaxle range switch (L range)	2H	Ground	B+	L range
2H (Input)				0 V	Other ranges, All positions
2I (Output)	Shift solenoid C	2I	Ground	B+	Solenoid valve ON
2I (Output)				0 V	Solenoid valve OFF
2J (Input)	Input / turbine speed sensor	2J	Ground	Approx. 9.5 V	Engine running (N position)
2K (Output)	Torque converter clutch solenoid valve	2K	Ground	B+	Solenoid valve ON
2K (Output)				0 V	Solenoid valve OFF
2L (Ground)	Input / turbine speed sensor	2L	Ground	0 V	Constant
2M (Input)	Engine control module (Reduce torque signal 1)	2M	Ground	Below 2.5 V	D, S or L range and 1→2 or 2→3 upshifting with throttle valve opening 6/8 or more / Others
2O (Memory power)	Battery ground	2O	Ground	0 V	Constant
2P (Ground)	Battery ground	2P	Ground	0 V	Constant
2Q (Battery power)	Battery	2Q	Ground	B+	Ignition switch ON
2Q (Battery power)				0 V	Ignition switch OFF
2R	—	—	—	—	—
2S	—	—	—	—	—
2T (Input)	Throttle position sensor (TVO)	2T	Ground	0.1 V—1.1 V; 3.1 V—4.4 V	Closed throttle position / Wide open throttle

2A (Input)

Connected toThrottle position sensor (Vapor)

Voltmeter + terminal2A

Voltmeter − terminalGround

Voltage4.5 V—5.5 V

ConditionIgnition switch ON

2A (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionIgnition switch OFF

2B (Input)

Connected toTransaxle range switch (P or N position)

Voltmeter + terminal2B

Voltmeter − terminalGround

Voltage0 V

ConditionP or N position

2B (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

VoltageB+

ConditionR position, All ranges

Connected to—

Voltmeter + terminal—

Voltmeter − terminal—

Voltage—

Condition—

2D (Input)

Connected toTransaxle range switch (D range)

Voltmeter + terminal2D

Voltmeter − terminalGround

VoltageB+

ConditionD range

2D (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionOther ranges, All positions

2E (Output)

Connected toShift solenoid A

Voltmeter + terminal2E

Voltmeter − terminalGround

VoltageB+

ConditionSolenoid valve ON

2E (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionSolenoid valve OFF

2F (Input)

Connected toTransaxle range switch (S range)

Voltmeter + terminal2F

Voltmeter − terminalGround

VoltageB+

ConditionS range

2F (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionOther ranges, All positions

2G (Output)

Connected toShift solenoid B

Voltmeter + terminal2G

Voltmeter − terminalGround

VoltageB+

ConditionSolenoid valve ON

2G (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionSolenoid valve OFF

2H (Input)

Connected toTransaxle range switch (L range)

Voltmeter + terminal2H

Voltmeter − terminalGround

VoltageB+

ConditionL range

2H (Input)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionOther ranges, All positions

2I (Output)

Connected toShift solenoid C

Voltmeter + terminal2I

Voltmeter − terminalGround

VoltageB+

ConditionSolenoid valve ON

2I (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionSolenoid valve OFF

2J (Input)

Connected toInput / turbine speed sensor

Voltmeter + terminal2J

Voltmeter − terminalGround

VoltageApprox. 9.5 V

ConditionEngine running (N position)

2K (Output)

Connected toTorque converter clutch solenoid valve

Voltmeter + terminal2K

Voltmeter − terminalGround

VoltageB+

ConditionSolenoid valve ON

2K (Output)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionSolenoid valve OFF

2L (Ground)

Connected toInput / turbine speed sensor

Voltmeter + terminal2L

Voltmeter − terminalGround

Voltage0 V

ConditionConstant

2M (Input)

Connected toEngine control module (Reduce torque signal 1)

Voltmeter + terminal2M

Voltmeter − terminalGround

VoltageBelow 2.5 V

ConditionD, S or L range and 1→2 or 2→3 upshifting with throttle valve opening 6/8 or more / Others

2O (Memory power)

Connected toBattery ground

Voltmeter + terminal2O

Voltmeter − terminalGround

Voltage0 V

ConditionConstant

2P (Ground)

Connected toBattery ground

Voltmeter + terminal2P

Voltmeter − terminalGround

Voltage0 V

ConditionConstant

2Q (Battery power)

Connected toBattery

Voltmeter + terminal2Q

Voltmeter − terminalGround

VoltageB+

ConditionIgnition switch ON

2Q (Battery power)

Connected to

Voltmeter + terminal

Voltmeter − terminal

Voltage0 V

ConditionIgnition switch OFF

Connected to—

Voltmeter + terminal—

Voltmeter − terminal—

Voltage—

Condition—

Connected to—

Voltmeter + terminal—

Voltmeter − terminal—

Voltage—

Condition—

2T (Input)

Connected toThrottle position sensor (TVO)

Voltmeter + terminal2T

Voltmeter − terminalGround

Voltage0.1 V—1.1 V; 3.1 V—4.4 V

ConditionClosed throttle position / Wide open throttle

Replacement

1
Disconnect the negative battery cable.
2
Disconnect the transaxle control module connector.
3
Remove the nuts and remove the transaxle control module.
4
Install the new transaxle control module.
Tightening torque: 19—25 N·m (1.9—2.6 kgf·m, 14—18 ft·lbf)
5
Connect the transaxle control module connector.
6
Connect the negative battery cable.

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WIRING DIAGRAM Z — H-1,2 Terminal Voltage Chart (TCM)

Terminal Voltage Chart

Terminal Voltage Chart — Left column

Terminal Voltage Chart — Right column

Replacement

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