EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M GE) FI-31 EFI SYSTEM CHECK PROCEDURE HINT: • Perform all voltage measurements with the connectors connected. • Verify that the battery voltage is 11 V or above when the ignition switch is at ON. Using a voltmeter with high impedance (10 kΩ/V minimum), measure the voltage at each terminal of the wiring connector. Terminals of ECU Symbol Terminal Name E01 POWER GROUND E02 POWER GROUND No. 10 INJECTOR (No. 1 and 4) No. 20 INJECTOR (No. 2 and 5) STA STARTER SWITCH No. 30 INJECTOR (No. 3 and 6) ST1 COLD START INJECTOR E1 COMPUTER GROUND NSW NEUTRAL START SWITCH (A/T) N/C CLUTCH SWITCH (M/T) *1HT OXYGEN SENSOR HEATER ISC1 ISC MOTOR NO. 1 COIL ISC3 ISC MOTOR NO. 3 COIL ISC2 ISC MOTOR NO. 2 COIL ISC4 ISC MOTOR NO. 4 COIL G⊖ DISTRIBUTOR VF1 CHECK CONNECTOR G1 DISTRIBUTOR Symbol Terminal Name TE1 CHECK CONNECTOR G2 DISTRIBUTOR VTA THROTTLE POSITION SENSOR - DISTRIBUTOR IDL THROTTLE POSITION SENSOR IGT IGNITER *1THG EGR GAS TEMP. SENSOR IGF IGNITER *1OX2 SUB-OXYGEN SENSOR THW WATER TEMP. SENSOR KNK KNOCK SENSOR OX1 OXYGEN SENSOR E2 SENSOR GROUND VSV1 VSV (AIR CONTROL) L1 TEMS (ECT) COMPUTER L2 TEMS (ECT) COMPUTER M.REL EFI MAIN RELAY (COIL) Symbol Terminal Name L3 TEMS (ECT) COMPUTER EGR VSV (EGR) A/C A/C MAGNETIC SWITCH SPD SPEEDOMETER W WARNING LIGHT FP FUEL PUMP RELAY DFG DEFOGGING RELAY THA AIR TEMP. SENSOR *1ECT ECT COMPUTER - AIR FLOW METER LP HEADLIGHT RELAY VC AIR FLOW METER *1E11 COMPUTER GROUND BATT BATTERY +B EFI MAIN RELAY IG SW IGNITION SWITCH +B1 EFI MAIN RELAY - - ECU Terminals [TABLE showing ECU terminal layout with two rows of pin connections] *1 California vehicles only *2 A/T only