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If the blower motor does not
operate, the blower motor circuit system may be
defective.
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- Malfunction of the front blower motor (blower linear
controller).
- Malfunction of the automatic air conditioner control
panel (A/C-ECU)
- Damaged the wiring harness or connectors
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Check that the A/C switch,
rear window defogger switch and outside/inside
air selection switch can operate.
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Q.
Is the check result normal?
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YES <LHD> : INSPECTION
PROCEDURE 31: Refer to A/C-ECU power supply system
<LHD> .
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YES <RHD Except vehicles for
Hong Kong and Singapore> : INSPECTION PROCEDURE 32:
Refer to A/C-ECU power supply system <RHD Except
vehicles for Hong Kong and Singapore> .
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YES <RHD Vehicles for Hong
Kong and Singapore> : INSPECTION PROCEDURE 33: Refer
to A/C-ECU power supply system <RHD Vehicles
for Hong Kong and Singapore> .
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Repair the CAN bus
line (Refer to GROUP 54F- Troubleshooting .)
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|
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Carry out the actuator test. (Refer
to )
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- Item 01, 02, 03: Front blower fan
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Q.
Does the blower motor work normally?
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Q.
Is the check result normal?
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Intermittent
malfunction (GROUP 00 - How to Cope with Intermittent
Malfunction ).
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|
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Replace the air
conditioner control panel (A/C-ECU) or the blower
motor
(blower linear controller).
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|
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![](../../../img/55/AC313398AB00ENG.png)
![](../../../img/55/AC313408AB00ENG.png)
![](../../../img/55/AC313418AB00ENG.png)
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Q.
Is the check result normal?
Go to Step
5.
Repair
the connector.
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Refer to GROUP 55, On-vehicle
Service - Power relay check .
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Q.
Is the blower relay in good condition?
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Replace the blower
relay.
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![](../../../img/55/AC313396AD00ENG.png)
![](../../../img/55/AC313404AD00ENG.png)
![](../../../img/55/AC313414AE00ENG.png)
![](../../../img/55/AC313392AC00ENG.png)
![](../../../img/55/AC313406AC00ENG.png)
![](../../../img/55/AC313416AC00ENG.png)
|
Q.
Is the check result normal?
Go to Step
7.
Repair
the connector.
|
![](../../../img/55/AC313396AD00ENG.png)
![](../../../img/55/AC313404AD00ENG.png)
![](../../../img/55/AC313414AE00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side. (2)Turn the ignition
switch to the ON position.
|
![](../../../img/55/AC313392AC00ENG.png)
![](../../../img/55/AC313406AC00ENG.png)
![](../../../img/55/AC313416AC00ENG.png)
![](../../../img/55/AC309471AD00ENG.png)
|
(3)Disconnect A/C-ECU
connector C-105, and earth terminal 45.
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![](../../../img/55/AC310507AO00ENG.png)
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(4)measure the voltage between
terminal 1 and body earth. OK: System
voltage
Q.
Is the check result normal?
Go to Step
14.
Go to Step
8.
|
![](../../../img/55/AC313398AB00ENG.png)
![](../../../img/55/AC313408AB00ENG.png)
![](../../../img/55/AC313418AB00ENG.png)
|
(1)Remove the relay, and measure at
the junction block side. (2)Turn the ignition switch to
the ON position.
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![](../../../img/55/AC310507AP00ENG.png)
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(3)Voltage between terminal 3 and
body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step
10.
Go to Step
9.
|
![](../../../img/55/AC313399AB00ENG.png)
![](../../../img/55/AC313409AB00ENG.png)
![](../../../img/55/AC313419AB00ENG.png)
|
note |
Prior to the wiring harness
inspection, check junction block connector
C-202, and repair
if necessary.
|
- Check the blower relay power supply line for open
circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction .)
Repair the wiring
harness.
|
![](../../../img/55/AC313398AB00ENG.png)
![](../../../img/55/AC313408AB00ENG.png)
![](../../../img/55/AC313418AB00ENG.png)
|
(1)Remove the relay, and measure at
the junction block side. (2)Turn the ignition switch to
the ON position.
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![](../../../img/55/AC310507AQ00ENG.png)
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(3)Voltage between terminal 5 and
body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step
12.
Go to Step
11.
|
![](../../../img/55/AC313392AD00ENG.png)
![](../../../img/55/AC313404AB00ENG.png)
![](../../../img/55/AC313414AB00ENG.png)
|
note |
Prior to the wiring harness
inspection, check intermediate connectors C-125
and junction
block connector C-204, and repair if
necessary.
|
- Check the blower relay power supply line for open
circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring
harness.
|
![](../../../img/55/AC313396AD00ENG.png)
![](../../../img/55/AC313404AD00ENG.png)
![](../../../img/55/AC313414AE00ENG.png)
![](../../../img/55/AC313399AB00ENG.png)
![](../../../img/55/AC313409AB00ENG.png)
![](../../../img/55/AC313419AB00ENG.png)
|
note |
Prior to the wiring harness
inspection, check junction block connector
C-202, and repair
if necessary.
|
- Check the blower relay earth wires for open
circuit.
Q.
Is the check result normal?
Go to Step
13.
Repair
the wiring harness.
|
![](../../../img/55/AC313392AC00ENG.png)
![](../../../img/55/AC313406AC00ENG.png)
![](../../../img/55/AC313416AC00ENG.png)
![](../../../img/55/AC313399AD00ENG.png)
![](../../../img/55/AC313409AD00ENG.png)
![](../../../img/55/AC313419AD00ENG.png)
|
note |
Prior to the wiring harness
inspection, check junction block connector
C-205, and repair
if necessary.
|
- Check the blower relay power supply line for open
circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring
harness.
|
|
Q.
Is the check result normal?
|
|
Replace the
outside/inside air selection damper control
motor.
|
|
|
![](../../../img/55/AC313396AE00ENG.png)
![](../../../img/55/AC313404AE00ENG.png)
![](../../../img/55/AC313414AF00ENG.png)
|
Q.
Is the check result normal?
Go to Step
16.
Repair
the connector.
|
![](../../../img/55/AC313396AE00ENG.png)
![](../../../img/55/AC313404AE00ENG.png)
![](../../../img/55/AC313414AF00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side.
|
![](../../../img/55/AC310506AP00ENG.png)
|
(2)Continuity between terminal 2
and body earth OK: 2Ω or
less
Q.
Is the check result normal?
Go to Step
18.
Go to Step
17.
|
![](../../../img/55/AC313396AE00ENG.png)
![](../../../img/55/AC313404AE00ENG.png)
![](../../../img/55/AC313414AF00ENG.png)
|
- Check the blower linear controller earth line for
open circuit.
Q.
Is the check result normal?
The trouble can be
an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
Repair the wiring
harness.
|
![](../../../img/55/AC313397AB00ENG.png)
![](../../../img/55/AC313405AB00ENG.png)
![](../../../img/55/AC313415AB00ENG.png)
|
- Check the blower linear controller power supply line
for open circuit.
Q.
Is the check result normal?
Go to Step
19.
Repair
the wiring harness.
|
![](../../../img/55/AC313396AE00ENG.png)
![](../../../img/55/AC313404AE00ENG.png)
![](../../../img/55/AC313414AF00ENG.png)
![](../../../img/55/AC313392AB00ENG.png)
![](../../../img/55/AC313406AB00ENG.png)
![](../../../img/55/AC313416AB00ENG.png)
|
- Check the blower linear controller power supply line
for open circuit.
Q.
Is the check result normal?
Go to Step
20.
Repair
the wiring harness.
|
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Check that the front blower motor
operates normally.
|
|
Q.
Is the check result normal?
|
|
This diagnosis is
complete.
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