Toyota 4-Runner 1985 Repair Manual page 242

EFI SYSTEM - Electronic Control System
2. MEASURE RESISTANCE OF ECU
CAUTION:
1. Do not touch the ECU terminals.
FI-73
2. The tester probe should be inserted into wiring con-
nector from the wiring side.
Check the resistance between each terminal of the wiring
connector.
• Remove the right kick panel.
'---_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ FIO_SS--..J2 •
Unplug the wiring connectors from the ECU .
Terminals
IDL - E2
VTA - E2
Vee -
E2
THA -
E2
THW - E2
+8 -
E2
Ve -
E2
I
Vs -
E2
Ne - El
• Measure the resistance between each terminal of the
wiring connectors.
Resistance at ECU Wiring Connectors
Condition Resistance
(kn)
Throttle valve open Infinity
Throttle valve fully closed
0-0.1
Throttle valve fully open 3.3 - 10
Throttle valve fully closed 0.2 - 0.8
-
3-7
Intake air temperature 20°C (68°F) 2-3
Coolant temperature 80°C (176°F) 0.2 - 0.4
-
0.2 - 0.4
-
0.1 -0.3
Measuring plate fully closed 0.02 - 0.1
Measuring plate fully open
0.02 - 1
-
0.14 - 0.18