Page text (OCR transcript)
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GE) FI-37
● VC — E2
(1)
ECU VC
E2
Voltmeter
V
F11621
(2)
E2
VC
Ohmmeter
Ω
Thickness
Gauge
F12715
(1) There is no voltage between ECU terminals VC and E2.
(IG SW ON)
(2) Check that there is voltage between ECU terminal +B (+B1) and
body ground. (IG SW ON)
OK NO
↓
(3) Check throttle position sensor. Refer to No. 1.
(See page FI-101) (See page FI-35)
BAD OK
↓ ↓
Repair or replace. Check wiring between ECU and throttle
position sensor.
OK BAD
↓ ↓
Try another ECU. Repair or replace
wiring
● VTA — E2
(1)
ECU VTA
E2
Voltmeter
V
F11626
(2)
ECU VC
E2
Voltmeter
V
F11678
(3)
E2
VTA
Ohmmeter
Ω
Thickness
Gauge
F12709
(1) There is no specified voltage at ECU terminals VTA and E2.
(IG SW ON)
(2) Check that there is voltage between ECU terminal VC and E2.
(IG SW ON)
NO OK
↓ ↓
Refer to VC — E2 (3) Check throttle position sensor.
trouble section.
BAD OK
OK ↓ ↓
↓ Repair or replace. Check wiring between ECU and
throttle position sensor.
BAD
↓
Repair or replace.
OK
↓
Try another ECU.