Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.

CHECK AIR CONDITIONING AMPLIFIER
1. Remove the A/C amplifier with the connector still connected.
2. Turn the ignition switch ON.
3. Operate the blower motor.
4. Measure the voltage between terminal FRBLW (A45-23) of the A/C amplifier and body ground.
  Standard voltage: 10 to 14 V
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

Fig 1: Identifying FRBLW
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: GO TO NEXT STEP
CHECK BLOWER MOTOR
1. Remove the blower motor.
2. Connect the positive (+) lead from the battery to terminal 2 of the blower motor connector and the negative (-) lead to terminal 1 and check the blower motor.
  OK: Blower motor operates smoothly.
NG: REPLACE BLOWER MOTOR

Fig 2: Checking Blower Motor
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: GO TO NEXT STEP

CHECK BLOWER MOTOR CONTROLLER

Remove the blower motor controller with the connectors still connected.
Turn the ignition switch ON.

Operate the blower motor (High blower speed).

TESTER CONNECTION AND SPECIFIED CONDITION

Tester Connection	Standard Condition
GND - Body ground	Continuity
+B - Body ground	Battery Positive Voltage
+M - Body ground	Battery Positive Voltage
M+ - M-	Battery Positive Voltage
SI - Body ground	1 to 3 V

NG: REPLACE BLOWER MOTOR CONTROLLER

Fig 3: Checking Blower Motor Controller

OK: REPLACE AIR CONDITIONING AMPLIFIER