Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTUATOR CHECK

Set to actuator check mode (See PRE-CHECK ).
Press the blower switch and change to step operation.

Check the air flow level by hand.

DISPLAY CODE AND BLOWER LEVEL

Display Code	Blower level
0	0
1	1
2	14
3	14
4	14
5	14
6	14
7	14
8	14
9	31

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG: Go to next step.

INSPECT BLOWER W/FAN MOTOR SUB-ASSY
1. Remove blower motor.
2. Connect positive (+) lead from the battery to terminal 2 and negative (-) lead to terminal 1.
  Standard: Blower motor operates smoothly.
  
  Fig 1: Inspecting Blower W/Fan Motor Sub-Assy
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE BLOWER W/FAN MOTOR SUB-ASSY
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR (BETWEEN BLOWER MOTOR AND BLOWER MOTOR CONTROL)
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR (BETWEEN BLOWER MOTOR CONTROL AND BODY GROUND)
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: Go to next step.
INSPECT HEATER CONTROL HOUSING SUB-ASSY (BLW)
1. Remove A/C amplifier assy with connectors still connected.
2. Ignition switch ON.
3. Blower switch ON (Lo).
4. Measure waveform between terminal BLW of A/C amplifier and body ground.
  Standard:
  
  Pulse generation
  
  Fig 2: Inspecting Heater Control Housing Sub-Assy (BLW)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
- The correct waveform is as shown in Fig 3 .
- Blower level changes waveform.
  
  Fig 3: Identifying Blower Level Changes Waveform
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPLACE HEATER CONTROL HOUSING SUB-ASSY
2. OK: Go to next step.
CHECK HARNESS OR CONNECTOR (BETWEEN HEATER CONTROL HOUSING SUB-ASSY AND BLOWER MOTOR CONTROL)
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: REPLACE BLOWER MOTOR CONTROL