CONTROL SYSTEM — Terminal Voltage

F2-142spec table

Remarks reference Self-Diagnosis Checker (49 H018 9A1) and System Selector (49 B019 9A0) SSTs.

Terminal Voltage

NOTE

B+: Battery positive voltage

ECM Terminal Voltage (1A–1L)

Terminal	Input	Output	Connection to	Test condition	Correct voltage	Remarks
1A	O		Battery	Constant	B+	For backup
1B	O		Main relay (FUEL INJ relay)	Ignition switch OFF	0V	—
1B	O		Main relay (FUEL INJ relay)	Ignition switch ON	B+	—
1C	O		Ignition switch (START)	While cranking	10V	—
1C	O		Ignition switch (START)	Ignition switch ON	Below 1.0V	—
1D		O	Data link connector (MEN terminal)	Test switch at "SELF-TEST" Light illuminated for 3 sec. after ignition switch OFF→ON	4.5–5.5V	With Self-Diagnosis Checker and System Selector
1D		O	Data link connector (MEN terminal)	Light not illuminated after 3 sec.	B+	With Self-Diagnosis Checker and System Selector
1D		O	Data link connector (MEN terminal)	Test switch at "O2 MONITOR" at idle Monitor light illuminated	4.5–5.5V	With Self-Diagnosis Checker and System Selector
1D		O	Data link connector (MEN terminal)	Test switch at "O2 MONITOR" at idle Monitor light not illuminated	B+	With Self-Diagnosis Checker and System Selector
1E		O	Malfunction indicator lamp (MIL)	Lamp illuminated for 3 sec. after ignition switch OFF→ON	Below 2.5V	With System Selector test switch at "SELF-TEST"
1E		O	Malfunction indicator lamp (MIL)	Lamp not illuminated after 3 sec.	B+	With System Selector test switch at "SELF-TEST"
1E		O	Malfunction indicator lamp (MIL)	Lamp illuminated	Below 2.5V	With System Selector test switch at "SELF-TEST"
1E		O	Malfunction indicator lamp (MIL)	Lamp not illuminated	B+	With System Selector test switch at "SELF-TEST"
1E		O	Data link connector (FEN terminal)	Buzzer sounded for 3 sec. after ignition switch OFF→ON	Below 2.5V	With Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"
1E		O	Data link connector (FEN terminal)	Buzzer not sounded after 3 sec.	B+	With Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"
1E		O	Data link connector (FEN terminal)	Buzzer sounded	Below 2.5V	With Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"
1E		O	Data link connector (FEN terminal)	Buzzer not sounded	B+	With Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"
1F	—	—	—	—	—	—
1G		O	Ignition control module	Ignition switch ON	Approx. 0V	—
1G		O	Ignition control module	Idle	Approx. 0.6	—
1H	O		Headlight switch	Head light ON	B+	—
1H	O		Headlight switch	Head light OFF	0V	—
1I	O		Data link connector (TEN terminal)	System Selector test switch at "O2 MONITOR"	B+	With Self-Diagnosis Checker and System Selector; Ignition switch ON
1I	O		Data link connector (TEN terminal)	System Selector test switch at "SELF-TEST"	Below 1.0V	With Self-Diagnosis Checker and System Selector; Ignition switch ON
1J	O		Rear window defroster relay	Rear window defroster switch OFF	B+	Ignition switch ON
1J	O		Rear window defroster relay	Rear window defroster switch ON	Below 1.5V	Ignition switch ON
1K		O	TCM	Engine coolant temperature below 60°C {140°F}	Below 1.0V	Ignition switch ON
1K		O	TCM	Engine coolant temperature above 60°C {140°F}	B+	Ignition switch ON
1L		O	A/C relay	A/C switch ON	Below 2.5V	Ignition switch ON
1L		O	A/C relay	A/C switch OFF	B+	Ignition switch ON

InputO

Output

Connection toBattery

Test conditionConstant

Correct voltageB+

RemarksFor backup

InputO

Output

Connection toMain relay (FUEL INJ relay)

Test conditionIgnition switch OFF

Correct voltage0V

Remarks—

InputO

Output

Connection toMain relay (FUEL INJ relay)

Test conditionIgnition switch ON

Correct voltageB+

Remarks—

InputO

Output

Connection toIgnition switch (START)

Test conditionWhile cranking

Correct voltage10V

Remarks—

InputO

Output

Connection toIgnition switch (START)

Test conditionIgnition switch ON

Correct voltageBelow 1.0V

Remarks—

Input

OutputO

Connection toData link connector (MEN terminal)

Test conditionTest switch at "SELF-TEST" Light illuminated for 3 sec. after ignition switch OFF→ON

Correct voltage4.5–5.5V

RemarksWith Self-Diagnosis Checker and System Selector

Input

OutputO

Connection toData link connector (MEN terminal)

Test conditionLight not illuminated after 3 sec.

Correct voltageB+

RemarksWith Self-Diagnosis Checker and System Selector

Input

OutputO

Connection toData link connector (MEN terminal)

Test conditionTest switch at "O2 MONITOR" at idle Monitor light illuminated

Correct voltage4.5–5.5V

RemarksWith Self-Diagnosis Checker and System Selector

Input

OutputO

Connection toData link connector (MEN terminal)

Test conditionTest switch at "O2 MONITOR" at idle Monitor light not illuminated

Correct voltageB+

RemarksWith Self-Diagnosis Checker and System Selector

Input

OutputO

Connection toMalfunction indicator lamp (MIL)

Test conditionLamp illuminated for 3 sec. after ignition switch OFF→ON

Correct voltageBelow 2.5V

RemarksWith System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toMalfunction indicator lamp (MIL)

Test conditionLamp not illuminated after 3 sec.

Correct voltageB+

RemarksWith System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toMalfunction indicator lamp (MIL)

Test conditionLamp illuminated

Correct voltageBelow 2.5V

RemarksWith System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toMalfunction indicator lamp (MIL)

Test conditionLamp not illuminated

Correct voltageB+

RemarksWith System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toData link connector (FEN terminal)

Test conditionBuzzer sounded for 3 sec. after ignition switch OFF→ON

Correct voltageBelow 2.5V

RemarksWith Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toData link connector (FEN terminal)

Test conditionBuzzer not sounded after 3 sec.

Correct voltageB+

RemarksWith Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toData link connector (FEN terminal)

Test conditionBuzzer sounded

Correct voltageBelow 2.5V

RemarksWith Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"

Input

OutputO

Connection toData link connector (FEN terminal)

Test conditionBuzzer not sounded

Correct voltageB+

RemarksWith Self-Diagnosis Checker and System Selector; With System Selector test switch at "SELF-TEST"

Input—

Output—

Connection to—

Test condition—

Correct voltage—

Remarks—

Input

OutputO

Connection toIgnition control module

Test conditionIgnition switch ON

Correct voltageApprox. 0V

Remarks—

Input

OutputO

Connection toIgnition control module

Test conditionIdle

Correct voltageApprox. 0.6

Remarks—

InputO

Output

Connection toHeadlight switch

Test conditionHead light ON

Correct voltageB+

Remarks—

InputO

Output

Connection toHeadlight switch

Test conditionHead light OFF

Correct voltage0V

Remarks—

InputO

Output

Connection toData link connector (TEN terminal)

Test conditionSystem Selector test switch at "O2 MONITOR"

Correct voltageB+

RemarksWith Self-Diagnosis Checker and System Selector; Ignition switch ON

InputO

Output

Connection toData link connector (TEN terminal)

Test conditionSystem Selector test switch at "SELF-TEST"

Correct voltageBelow 1.0V

RemarksWith Self-Diagnosis Checker and System Selector; Ignition switch ON

InputO

Output

Connection toRear window defroster relay

Test conditionRear window defroster switch OFF

Correct voltageB+

RemarksIgnition switch ON

InputO

Output

Connection toRear window defroster relay

Test conditionRear window defroster switch ON

Correct voltageBelow 1.5V

RemarksIgnition switch ON

Input

OutputO

Connection toTCM

Test conditionEngine coolant temperature below 60°C {140°F}

Correct voltageBelow 1.0V

RemarksIgnition switch ON

Input

OutputO

Connection toTCM

Test conditionEngine coolant temperature above 60°C {140°F}

Correct voltageB+

RemarksIgnition switch ON

Input

OutputO

Connection toA/C relay

Test conditionA/C switch ON

Correct voltageBelow 2.5V

RemarksIgnition switch ON

Input

OutputO

Connection toA/C relay

Test conditionA/C switch OFF

Correct voltageB+

RemarksIgnition switch ON

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CONTROL SYSTEM — Terminal Voltage

Terminal Voltage

ECM Terminal Voltage (1A–1L)

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