Toyota Land Cruiser 1988 Repair Manual page 334

AIR CONDITIONING SYSTEM -Air conditioner Amplifier AC-13
Wire Harness Side
Check for Tester connection
Continuity
6- Ground
Voltage 2-6
Voltage
3-6
Voltage A-6
Continuity 7-6
Continuity 8-9
Continuity 9- Ground
G-9-1
H-1·2
AIR CONDITIONER AMPLIFIER
INSPECTION OF AMPLIFIER
INSPECT AMPLIFIER CIRCUIT
Disconnect the amplifier and inspect the connector on
the wire harness side as shown in the chart below.
Test conditions:
(1) Ignition switch: ON
(2) Temperature control lever: MAX COOL
(3) Blower switch: HI
Condition
Specified valve
-
Continuity
Turn A/C switch on. Battery voltage
Turn A/C switch off No voltage
Turn A/C switch on. Battery voltage
Turn A/C switch off
No voltage
Turn on IG switch to ST position Battery voltage
Turn off IG switch No voltage
-
Continuity
-
Continuity
-
Continuity
If circuit is correct, replace the amplifier