EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) FI-65 No. Terminals Trouble Condition STD Voltage 10 ISC1 - ISC4 - E1 No voltage Ignition switch ON 9 - 14 V EFI Main Relay ISC Valve ECU Fuse EFI 15A AM2 2.0A Fusible Link MAIN 2.0L Battery ISC1 ISC2 ISC3 ISC4 J8 J81 M-REL E1 FI2659 ISC1 ISC2 ISC3 ISC4 ① ECU Voltmeter FI1609 ② Voltmeter J81 E1 FI2757 ③ J8/B2 S2 S1 S3 J81 Battery FI1643 ① There is no voltage between ECU terminals ISC1 ~ ISC4 and E1. (IG SW ON) ② Check that there is voltage between ECU terminal J8 (J81) and body ground. (IG SW ON) OK NO Refer to No. 1. (See page FI-54) Check wiring between ECU terminal E1 and body ground. OK BAD Repair or replace. ③ Check ISV valve. (See page FI-106) BAD OK Replace ISC valve. Check wiring between ECU and EFI main relay. OK BAD Try another ECU. Repair or replace.