EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) FI-61 No. | Terminals | Trouble | Condition | STD Voltage 6 | THW - E2 | No voltage | Ignition switch ON | Coolant temperature 80°C (176°F) | 0.1 - 1.0 V ECU +B (+B1) THW E2 E1 Water Temp. Sensor FI2483 1 ECU Voltmeter THW E2 1 There is no voltage between ECU terminals THW and E2. (IG SW ON) FI2765 2 Check that there is voltage between ECU terminal +B (+B1) and body ground. (IG SW ON) OK | NO | Refer to No. 1. (See page FI-54) 2 ECU Voltmeter +B Check wiring between ECU terminal E1 and body ground. OK | BAD | Repair or replace. FI2757 3 Inspect water temp. sensor. (See page FI-113) BAD | OK Replace water temp. sensor. | Check wiring between ECU and water temp. sensor. OK | BAD Try another ECU. | Repair or replace. 3 Ohmmeter FI3754