Voltage at ECU Wiring Connectors

No.

Terminals

Condition

STD voltage (V)

See page

1

+ B-E1 + B1

IG SW ON

10-14

FI-54

2

BATT - E1

-

10-14

FI-55

3

IDL- E1

IG SW ON

Throttle valve open

8-14

FI-56

PSW - E1

Throttle valve fully closed / Throttle opener must be \ \ cancelled first /

4.5 - 5.5

4

PIM - E2

IG SW ON

3.3 - 3.9

FI-57

VC - E2

4.5 - 5.5

5

No.10 E01 No.20 E02

10-14

FI-58

6

THA - E2

IG SW ON

Intake air temp. 20°C (68°F)

1.7-3.1

FI-59

7

THW - E2

Coolant temp. 80°C (176°F)

0.3 - 0.8

FI-60

8

STA - E1

Cranking

6-14

Fl-61

9

IGT - E1

Cranking or idling

0.8-1.2

FI-62

10

ISCC ISCO

IG SW ON

8-14

FI-63

11

W- E1

No trouble ("CHECK" engine warning light off) and engine running

10-14

FI-64

12

A/C- E1

IG SW ON

Air conditioning ON

8-14

FI-65

Engine ECU Terminals

pj

-1-'-

U

—I_I—1—■—1_r—

I_

-1-1-|_J-

E01

No. 10

STA

STJ

FPU

ISCC

0X1

G1

IGF

T

THA

PIM

THW

PS CT

B/K

ELS

FC

VF

BATT

+ B1

E02

No. 20

IGT

E1

EGR

ISCO

0X2

E21

NE

THG

IDL

VC

PSW

E2

PS

/

SPD

A/C

W

Terminals

Trouble

Condition

STD voltage

No voltage

IG SW ON

10-14 V

Battery

Battery

Ignition Switch

Engine ECU

Ignition Switch

Engine ECU

Fl 5742

No.

Terminals

Trouble

Condition

STD voltage

2

BATT - E1

No voltage

IG SW ON

Battery

Engine ECU

Engine ECU

FI5738

Toyota Voltage

No.

Terminals

Trouble

Condition

STD Voltage

IDL - E1

Throttle valve open

8-14 V

3

PSW - E1

No voltage

IG SW ON

Throttle valve fully closed /Throttle opener must be\ ^cancelled first /

Engine ECU

• IDL - E1, PSW - E1

No.

Terminals

Trouble

Condition

STD Voltage

4

PIM - E2

No voltage

IG SW ON

3.3 - 3.9 V

VC - E2

4.5 - 5.5 V

Vacuum Sensor Manifold Absolute Pressure Sensor

Engine ECU

Engine ECU

FH 226

• PIM - E2, VC - E2

Terminals

Trouble

Condition

STD voltage

No voltage

IG SW ON

10-14 V

Ignition Switch

Ignition Switch

fi5735

OK

Terminals

Trouble

Condition

STD voltage

No voltage

IG SW ON

Intake air temperature 20°C (68°F)

Intake Air Temp. Sensor THA

Engine ECU

Terminals

Trouble

Condition

STD voltage

No voltage

IG SW ON Coolant temperature 80°C (176°F)

Water Temp. Sensor a thw

Engine ECU

4thw

fi3572

Terminals

Trouble

Condition

STD voltage

No voltage

Cranking

Ignition Switch AM2

[ST2

MAIN 2.OL

Battery

MAIN 2.OL

1 .OY (j

Starter

Start

Switch

Starter Relay

Starter Relay

Engine ECU

Engine ECU

fi5736

Terminals

Trouble

Condition

STD voltage

No voltage

Idling

Ignition Switch

Battery

Ignition Switch

Battery

Engine ECU

Ignition Coil

To Tachometer

Igniter

Igniter

Engine ECU

To Tachometer

fi5740

Terminals

Trouble

Condition

STD voltage

ISCC ISCO

No voltage

IG SW ON

Ignition Switch AM2

Fuse AM2 7.5A

Battery

Engine ECU

Fuse AM2 7.5A

Engine ECU

Battery

fi5741

OK

Try another ECU.

Terminals

Trouble

Condition

STD voltage

No voltage

No troable ("CHECK warning light off) and engine running

10-14 V

Engine ECU

To Ignition Switch (IG1)

Fuse

GAUGE

7.5A

"CHECK" Engine Warning Light

"CHECK" Engine Warning Light

Combination Meter

Engine ECU

) w

> E1

Terminals

Trouble

Condition

STD voltage

No voltage

Air conditioning ON

To A/C Amplifier

A/ Compressor

Engine ECU

Engine ECU

FI0922

Check Connector

fi3841

Check Connector

CALIF, only

Engine ECU

Engine ECU

fl2680

Voltmeter

Voltmeter

fi2911

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