Diagram Information and Instructions
E2 (A), E3 (B), E4 (C), E5 (D) ENGINE CONTROL MODULEBATT-E1 : Always 9.0-14.0 volts
+B-E1 : 9.0 - 14.0 volts (Ignition SW at ON position)
VC-E2 : 4.5 - 5.5 volts (Ignition SW at ON position)
VTA-E2 : 0.3 - 0.8 volts (Ignition SW ON and throttle valve fully closed)
3.2 - 4.9 volts (Ignition SW ON and throttle valve open)
THA-E2 : 0.5 - 3.4 volts (Ignition SW ON and intake air temp. 20 °C, 68 °F)
THW-E2 : 0.2 - 1.0 volts (Ignition SW ON and coolant temp. 80 °C, 176 °F)
STA-E1 : 6.0 - 14.0 volts (Engine cranking)
W-E1 : 9.0 - 14.0 volts (No trouble and engine running)
STP-E1 : 9.0 - 14.0 volts (Brake pedal depress)
RSO-E1 : 9.0 - 14.0 volts (Ignition SW at ON position)
IGT1, IGT2, IGT3, IGT4-E1 : 0.8 - 1.2 volts (Engine cranking or idling)
#10, #20, #30, #40-E01, E02 : 9.0 - 14.0 volts (Ignition SW at ON position)
RESISTANCE OF ECU WIRING CONNECTORS
(Disconnect wiring connector)
VTA-E2 : 3.3 - 10.0 k ohms (Throttle valve fully open)
0.2 - 5.5 k ohms (Throttle valve fully closed)
VC-E2 : 2.0 - 7.0 k ohms
THA-E2 : 2.0 - 3.0 k ohms (Intake air temp. 20° C, 68° F)
THW-E2 : 0.2 - 0.4 k ohms (Coolant temp. 80° C, 176° F)
RSO-E1 : 19.3 - 22.3 ohms
C/OPN RELAY
5-3 : Closed with the starter cranking and engine running
EFI MAIN RELAY
3-5 : Closed with the ignition SW at ON or ST position
EI ENGINE COOLANT TEMP. SENSOR
1-2 : 10.0 - 20.0 k ohms (-20° C, -4° F)
4.0 - 7.0 k ohms (0° C, 32 ° F)
2.0 - 3.0 k ohms (20 °C, 68 ° F)
0.9 - 1.3 k ohms (40 °C, 104 ° F)
0.4 - 0.7 k ohms (60 °C, 140 ° F)
0.2 - 0.4 k ohms (80 °C, 176 °F)