Toyota Supra 1990 Manual page 298

FI-124
7M-GE
Ohmmeter
CKJ
EFI SYSTEM - Electronic Control System
3. INSPECT RESISTANCE OF ECU
NOTICE:
• Do not touch the ECU terminals.
• The tester probe should be inserted into the wiring con-
nector from the wiring side.
Check the resistance between each terminal of the wiring
connectors.
0101+---------'
• Disconnect the connectors from the ECU.
o
7M-GTE
Ohmmeter
en.1
o
ECU Wiring
]I
Olc+l-----
o
Terminals
IDL - E2
VTA - E2
*1
VC -
E2
*1
VS - E2
THW
-
E2
Gl, G2
-
G8
NE
-
GG
(7M-GE)
NE - G 8
(7M-GTE)
ISC1, ISC2
ISC3, ISC4 - +B(+B1)
* 1 7M-GE only
*
27M-GTE only
• Measure the resistance at each terminal.
Ie=-,]
FI4557
FI4561
Resistance of ECU Wiring Connectors
Condition
Resistance
(n)
Throttle valve open
00
Throttle valve fully closed 2,300 or less
Throttle valve fully open 3,500 - 10,300
Throttle valve fully closed
200 - 1,200
-
4,250 - 8,250
Measuring plate fully closed 200 - 600
Measuring plate fully open
20 - 1,200
Coolant temperature 80°C (176°F) 200 - 400
-
140 - 180
-
180 - 220
-
140 - 180
-
10 - 30