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