Toyota 4A-FE Repair Manual page 118

:
No.
Terminals
I
11 A/C - El
)
To
A/C Amplifier
Voltmeter
[ v_j
I
-R
ECU
EFI SYSTEM - Troubleshooting with Volt/Ohmmeter Fl-49
Trouble Condition
STD voltage
No voltage Air conditioning ON 5 - 14
v
ECU
r
"'I
A/C
~~
... µ
-~'-
. .
_[
>E1
A/C Compressor
-
-
\.....
.J
F10922
CD
CD
There is no voltage between ECU terminals A/C and E1 .
1
(Air conditioning ON)
@Check that there is voltage between ECU terminal A/C and
body ground.
I
~
,9 ______
~)
J9 )it-------i______. ____ _, _ _. . . . . , ,
NO
j
OK
Ohmmeter
L lLJ
I 1 9
L/_
:) 2
F14045
ECU
Fl4055
Fl4040
®Check wiring between ECU terminal E1 and body
ground.
j
OK
j
BAD
Try
another ECU.
Repair or replace .
•
OK
Check wiring be-
Check compressor running.
-
--
tween ECU terminal
A/C and Amplifier.
NO
j
BAD
Repair or replace .
~.
Check that there is voltage between BAD
Repair or replace.
--
amplifier terminal and body ground.
OK
Check wiring between amplifier
BAD
Repair or replace.
and ECU or compressor.
-