
Electronic Controlled Unit (ECU)
INSPECTION OF ECU
1. MEASURE VOLTAGE OF ECU
NOTE: The EFI circuit can be checked by measuring the resistance and voltage at the wiring connectors of the ECU.
Check the voltages at the wiring connectors.
• Remove the glove box.
• Turn on the ignition switch.
• Measure the voltage at each terminal.
Voltmeter ECU
+B
E1
NOTE: 1. Perform all voltage measurements with the connectors connected.
2. Verify that the battery voltage is 11V or above when the ignition switch is ON.
Connectors of ECU
Symbol Terminal Name Symbol Terminal Name Symbol Terminal Name
E01 ENGINE GROUND G– ENGINE REVOLUTION SENSOR A/C A/C MAGNET SWITCH
E02 ENGINE GROUND V+ CHECK CONNECTOR SPD SPEEDOMETER
No. 10 INJECTOR G ENGINE REVOLUTION SENSOR W WARNING LIGHT
No. 20 INJECTOR – CHECK CONNECTOR THA AIR TEMP. SENSOR
STA STARTER SWITCH +VTA THROTTLE SWITCH V+ AIR FLOW METER
IGt IGNITER Ne ENGINE REVOLUTION SENSOR Vc AIR FLOW METER
EGR EGR VSV IDL THROTTLE SWITCH BAT BATTERY +B
E1 ENGINE GROUND KNK KNOCK SENSOR IG-SW IGNITION SWITCH
N/C NEUTRAL START SWITCH (A/T) IGf IGNITER +B MAIN RELAY
– CLUTCH SWITCH (M/T) Ox OXYGEN SENSOR TCD ECT COMPUTER
ISC1 ISC MOTOR NO. 1 COIL THW WATER TEMP. SENSOR OL OIL PRESSURE SWITCH
ISC2 ISC MOTOR NO. 2 COIL E2 SENSOR EARTH L1 ECT COMPUTER
ISC3 ISC MOTOR NO. 3 COIL E1 ENGINE GROUND L2 ECT COMPUTER
ISC4 ISC MOTOR NO. 4 COIL M-REL MAIN RELAY COIL L3 ECT COMPUTER
E01 No. 10 STA EGR N/C ISC1 ISC2 ISC3 G-C G Ne IGf THW L1 L2 L3 M-REL SPD THA V+ Vc BAT IG-SW
E02 No. 20 IGt E1 ISC4 IDL V+ T +VTA IDL KNK Ox E2 E2 E1 TCD A/C W OIL +B +B
FI043I