DESCRIPTION
The blower motor is operated by signals from the A/C amplifier. Blower motor speed signals are transmitted in accordance with changes in the duty ratio.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
1. |
PERFORM ACTIVE TEST USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body / Air Conditioner / Active Test.
(e) Check the operation by referring to the table below.
Air Conditioner
Tester Display |
Test Part |
Control Range |
Diagnostic Note |
---|---|---|---|
Blower Motor |
Blower motor |
Min.: 0, Max.: 31 |
- |
OK:
Blower motor operates and blower motor speed level changes.
Result |
Proceed to |
---|---|
OK |
A |
NG (Blower motor does not operate) |
B |
NG (Blower motor operates but does not change speed) |
C |
A | ![]() |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
C | ![]() |
GO TO STEP 6 |
|
2. |
CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - BODY GROUND) |
(a) Disconnect the blower motor connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
D41-1 (GND) - Body ground |
Always |
Below 1 Ω |
*1 |
Front view of wire harness connector (to Blower Motor) |
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
3. |
CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - BATTERY) |
(a) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
4. |
CHECK HARNESS AND CONNECTOR (BLOWER MOTOR - A/C AMPLIFIER) |
(a) Disconnect the A/C amplifier connector. |
|
(b) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
NG | ![]() |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
5. |
INSPECT BLOWER MOTOR |
(a) Reconnect the blower motor connector.
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
NG | ![]() |
REPLACE BLOWER MOTOR |
|
6. |
INSPECT A/C AMPLIFIER |
(a) Remove the A/C amplifier. |
|
(b) Reconnect the A/C amplifier connector.
(c) Turn the ignition switch to ON.
(d) Turn the blower switch LO.
(e) Measure the waveform between terminal D47-23 (BLW) of the A/C amplifier and body ground.
Item |
Content |
---|---|
Tool setting |
1 V/DIV., 500 μs/DIV. |
Vehicle condition |
Ignition switch ON Blower switch LO |
OK:
Waveform is as shown in the illustration.
HINT:
The waveform varies with the blower speed.
Text in Illustration
*1 |
Component with harness connected (A/C Amplifier) |
OK | ![]() |
REPLACE BLOWER MOTOR |
NG | ![]() |
REPLACE A/C AMPLIFIER |
Certification ECU Communication Stop Mode
DESCRIPTION
Detection Item
Symptom
Trouble Area
Certification ECU Communication Stop Mode
"Smart Access/Smart Key/Wireless Tuner" is not displayed on
"CAN Bus Check&q ...
Disassembly
DISASSEMBLY
PROCEDURE
1. REMOVE INTAKE VALVE
(a) Using SST and wooden blocks, compress the compression spring and
remove the valve spring retainer locks.
SST: 09202-70020
09202-00010
(b) R ...
PIG Power Supply Voltage Malfunction (C1552)
DESCRIPTION
When a problem occurs in the power steering system, the power source relay circuit
is shut off to stop the power assist.
DTC No.
DTC Detection Condition
Trouble Area
C1552
PIG power s ...