Inspection Procedure

WARNING: This page is about a different car, the 2007 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST BY INTELLIGENT TESTER (BLOWER MOTOR)

Connect the intelligent tester to (with CAN VIM) the DLC3.
Turn the ignition switch ON and turn the intelligent tester main switch ON.

Select the item below in the ACTIVE TEST, and then check that the blower motor operates.

Air conditioning amplifier

ACTIVE TEST DETAIL

Item	Test Details / Display	Diagnostic Note
BLOWER MOTOR	Blower motor / Min.: 0, Max.: 31	-

Result

RESULT REFERENCE

Result	Proceed to
NG (blower motor does not operate)	A
NG (blower motor operates but does not change speed)	B
OK	C

B: Go to step 6

C: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

A: GO TO NEXT STEP.

INSPECT FUSE (HTR)
1. Remove the HTR H-fuse from the engine room No. 2 relay block.
2. Measure the resistance of the H-fuse.
  Standard resistance:
  
  Below 1
NG: REPLACE FUSE

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (BLOWER MOTOR - BODY GROUND)

Disconnect the E53 motor connector.

Fig 1: Identifying E53 Blower Motor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance of the wire harness side connector.

Standard resistance

TERMINALS RESISTANCE SPECIFICATION (CONNECTOR(S) DISCONNECTED)

Tester Connection	Specified Condition
E53-1 (GND) - Body ground	Below 1

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (BLOWER MOTOR - BATTERY)

Disconnect the E53 motor connector.

Fig 2: Identifying E53 Blower Motor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION (CONNECTOR(S) DISCONNECTED)

Tester Connection	Condition	Specified Condition
E53-3 (+B) - Body ground	Ignition switch ON	10 to 14 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP.

CHECK BLOWER W/FAN MOTOR SUB-ASSEMBLY

Disconnect the E37 amplifier connector.
Connect the E53 motor connector.

Fig 3: Checking Blower W/Fan Motor Sub-Assembly At E37 & E53 Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the connector.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION

Tester Connection	Condition	Specified Condition
E53-2 (SI) - Body ground	Ignition switch ON	4.5 to 5.5 V

NG: REPLACE BLOWER W/FAN MOTOR SUB-ASSEMBLY

OK: GO TO NEXT STEP.

CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BODY GROUND)

Disconnect the E37 amplifier connector.

Fig 4: Disconnecting E37 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the voltage of the wire harness side connector.

Standard voltage

TERMINALS VOLTAGE SPECIFICATION (CONNECTOR(S) DISCONNECTED)

Tester Connection	Condition	Specified Condition
E37-23 (BLW) - Body ground	Ignition switch ON Blower switch OFF	4.5 to 5.5 V

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR

OK: GO TO NEXT STEP.

CHECK AIR CONDITIONING AMPLIFIER

Remove the air conditioning amplifier with its connectors still connected.

Check the waveform of the amplifier connector.

OK :

Waveform is as shown in the illustration. (See Fig 5)

HINT:

The waveform varies with the blower level.

Fig 5: Blower Motor Control Signal Waveform Graph

ITEM AND CONTENT REFERENCE

Item	Content
Tester Connection	BLW (E37-23) - GND (E37-14)
Tool Setting	1 V/DIV., 500 msec./DIV.
Condition	Ignition switch ON Blower switch LO

NG: REPLACE AIR CONDITIONING AMPLIFIER

OK: REPLACE BLOWER W/FAN MOTOR SUB-ASSEMBLY