Page text (OCR transcript)
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