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 |
Intake Manifold Runner Control Circuit Low (Bank 1) (P2009,P2010)
DESCRIPTION
The ECM activates the DC motor for the tumble control valve, which opens and
closes the tumble control valve. The ECM activates the DC motor based on engine
speed, coolant temperature, intake air temperature and other conditions.
D ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) When troubleshooting a vehicle with a diagnosis system, the only difference
from the usual troubleshooting procedure is connecting the Techstream to the vehicle
and reading various data output from the clearance warnin ...
Removal
REMOVAL
PROCEDURE
1. DRAIN AUTOMATIC TRANSAXLE FLUID
2. REMOVE FRONT FRAME ASSEMBLY
See page
3. SUPPORT ENGINE ASSEMBLY
4. REMOVE BELT
5. REMOVE AUTOMATIC TRANSAXLE OIL PAN SUB-ASSEMBLY
(a) Remove the 18 bolts and automatic transa ...