Page text (OCR transcript)
FI-46
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GE)
No. | Terminals | Trouble | Condition | STD Voltage
11 | A/C — E1 | No voltage | Air conditioning ON | 10 — 14 V
ECU
To A/C
Amplifier ←——————————————————————————— A/C
E1
⏚
FH925
① There is no voltage between ECU terminals A/C and E1.
(Air conditioning ON)
①
ECU
A/C
Voltmeter ⏚ ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
V E1
FH254
② Check that there is voltage between ECU terminal A/C and
body ground.
NO OK
③ Check wiring between ECU terminal E1 and body
ground.
OK BAD
Try another ECU. | Repair or replace.
②
ECU
A/C
Voltmeter ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
V ⏚
FH254
Check that there is voltage between | BAD | Repair or replace.
amplifier terminal and body ground.
OK
Check wiring between amplifier and | BAD | Repair or replace.
ECU terminal A/C.
③
E1 ECU
Ohmmeter ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯
Ω ⏚
FI0011