Page text (OCR transcript)
EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) FI-67
No. | Terminals | Trouble | Condition | STD Voltage
12 | A/C — E1 | No voltage | Ignition switch ON | Air conditioning ON | 10 ~ 14 V
ECU
To A/C Amplifier ————————————————— A/C
E1
⏚
FI0255
① There is no voltage between ECU terminals A/C and E1.
(Air conditioning ON)
ECU
Voltmeter
⊖ ⊕
E1 A/C
FI0576
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.
ECU
Voltmeter
⊖ ⊕
A/C
FI0219
Check that there is voltage between amplifier terminal and body ground. | BAD | Repair or replace.
OK
Check wiring between amplifier and ECU terminal A/C. | BAD | Repair or replace.
ECU
Ohmmeter
⊖ ⊕
E1
FI0255