TSRM/MK2 Supra/Wiring Diagrams
Repair ManualWiring Diagrams
p.001

S27/ECT System, page 2

2 / 4
p.003
ECT System — MK2 Supra ECT System wiring diagram, page 2
100%
Page text (OCR transcript)
27

⑧ A/T INDICATOR S/H
2-GROUND: 12 VOLTS WITH IGNITION S/H ON
⑨ ECT ECU(ELECTRONIC CONTROL UNIT)(IGNITION S/H ON)
19-GROUND: ALWAYS CONTINUITY
2-GROUND: S=0→5→0→5 VOLTS
3-GROUND: S=0→5 VOLTS } (SLOWLY DEPRESS THE ACCEL PEDAL)
4-GROUND: S=0 VOLT
1-19 : 0 VOLT WITH THROTTLE VALVE FULLY CLOSED
4 VOLTS WITH THROTTLE VALVE OPENING ABOVE 1.5°
18-19 : 12 VOLTS OR 0 VOLT WITH STANDING STILL
8 VOLTS WITH ENGINE RUNNING,VEHICLE MOVING
22-19 : 12 VOLTS WITH BRAKE PEDAL DEPRESSED
0 VOLT WITH BRAKE PEDAL NOT DEPRESSED
21-19 : 9 TO 18 VOLTS WITH SHIFT LEVER AT 2 POSITION
0 TO 2 VOLTS WITH SHIFT LEVER AT EXCEPT 2 POSITION
20-19 : 9 TO 18 VOLTS WITH SHIFT LEVER AT L POSITION
0 TO 2 VOLTS WITH SHIFT LEVER AT EXCEPT L POSITION
12-19 : 12 VOLTS
10,11-19 : 0 VOLT
5-19 : 12 VOLTS WITH O/D MAIN S/H ON
0 VOLT WITH O/D MAIN S/H OFF
24-19 : 12 VOLTS WITH STANDING STILL
15-19 : 5(12) VOLTS WITH STANDING STILL
4(10) VOLTS WITH ENGINE RUNNING
8-19 : 12 VOLTS WITH PATTERN SELECT S/H AT PWR POSITION
0 VOLT WITH PATTERN SELECT S/H AT NORM POSITION
23-19 : 12 VOLTS
17-GROUND: 0 VOLT WITH COOLANT TEMP.35-80°C(95-140°F)
5 VOLTS WITH COOLANT TEMP.MORE THAN 70°C(158°F)
(i) AISIN COMPUTER

⑥ ECT SOLENOID
1,2,4-GROUND: EACH 11-15 Ω
① ② ③ SPEED SENSOR (COMB.METER)
7-6,12-2: REVOLVE METER SHAFT AND CHECK THAT METER
NEEDLE REPEATEDLY DEFLECTS FROM 0Ω TO ∞Ω

⑥ O/D MAIN S/H
1-3 : CLOSED WITH O/D MAIN S/H OFF
OPEN WITH O/D MAIN S/H ON

R-G

G-B

D02

2 ①- 1 ①-- 5 ④(ANALOG METER)
2 ⑧-- 2 ⑧-- 5 ④(DIGITAL METER)

PWR
NORM

A/T INDICATOR

6 ⑨--5 ④(ANALOG METER)
6 ⑨--1 ④(DIGITAL METER)

GR-Y

W-B

D/D MAIN S/H

UNDER
J/B NO.3

W-B
W-B
W-B

18 21

10 63

8

E
R-B

R-B

N-B

W-B

GR-Y

16

2A

2F

UNDER J/B NO.3

16

18

9

2

1

3

- 69 -