Toyota Land Cruiser 1988 Repair Manual page 174

EFI SYSTEM- Troubleshooting with Volt/Ohmmeter Fl-43
No.
Terminals Trouble Condition STD Voltage
11 A/C- E1
No voltage
Air conditioning ON
10-14
v
ECU
A/C
AIC
Amplifier
E1
AI
C Compressor
--~
FIOS22
CD
There is no voltage between ECU terminals A/C and E1.
(Air conditioning ON)
CD
ECU
A/C
®
Check that there is voltage between ECU terminal A/ C and
body ground.
NO
!
OK
Fl1255
@
Check wiring between ECU terminal E1 and body
ground.
!
OK
J
BAD
Try another ECU. Repair or replace.
OK
Check compressor running.
Check wiring
between ECU
terminal A/ C and
amplifier.
BAD
!
BAD
@
Repair or replace.
Check that there is voltage between BAD
amplifier terminal and body ground.
Repair or replace.
OK
Check wiring between amplifier
BAD
and ECU or compressor.
Repair or replace.
F10311