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If the rear blower motor does not
operate, the rear blower motor circuit system may be
defective.
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- Malfunction of rear blower relay
- Malfunction of rear blower motor
- Malfunction of rear power transistor
- Malfunction of the A/C-ECU
- Damaged harness wires and connectors
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![](../../../img/55/AC313408AG00ENG.png)
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Q.
Is the check result normal?
Go to Step
2.
Repair
the connector.
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Q.
Is the check result normal?
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Replace the rear
blower relay.
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![](../../../img/55/AC313406AK00ENG.png)
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Q.
Is the check result normal?
Go to Step
4.
Repair
the connector.
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![](../../../img/55/AC313406AK00ENG.png)
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(1)Disconnect the connector, and
measure at the wiring harness side. (2)Turn the ignition
switch to the ON position.
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![](../../../img/55/AC313406AH00ENG.png)
![](../../../img/55/AC309471AH00ENG.png)
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(3)Disconnect A/C-ECU
connector C-104 and earth terminal 56.
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![](../../../img/55/AC310507BE00ENG.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
11.
Go to Step
5.
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![](../../../img/55/AC313408AG00ENG.png)
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(1)Remove the relay, and measure at
the relay block side. (2)Turn the ignition switch to the
"ON" position.
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![](../../../img/55/AC310507BF00ENG.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
7.
Go to Step
6.
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![](../../../img/55/AC313406AD00ENG.png)
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note |
Prior to the wiring harness
inspection, check junction block connectors
C-202, C-205 and joint connector C-01, and
repair if necessary.
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- Check the rear 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.
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![](../../../img/55/AC313408AG00ENG.png)
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(1)Remove the relay, and measure at
the relay block side. (2)Turn the ignition switch to the
"ON" position.
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![](../../../img/55/AC310507EJ00ENG.png)
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(3)Voltage between terminal 4 and
body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step
9.
Go to Step
8.
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![](../../../img/55/AC313404AB00ENG.png)
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note |
Prior to the wiring harness
inspection, check intermediate connector C-125
and junction block connector C-201, and repair
if necessary.
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- Check the rear 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.
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![](../../../img/55/AC313406AH00ENG.png)
![](../../../img/55/AC313409AM00ENG.png)
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note |
Prior to the wiring harness
inspection, check junction block connector
C-201, and repair if necessary.
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- Check the rear blower relay power supply line for
open circuit.
Q.
Is the check result normal?
Go to Step
10.
Repair
the wiring harness.
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![](../../../img/55/AC313406AK00ENG.png)
![](../../../img/55/AC313409AM00ENG.png)
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note |
Prior to the wiring harness
inspection, check junction block connector
C-201, and repair if necessary.
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- Check the rear 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.
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![](../../../img/55/AC313427AC00ENG.png)
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Q.
Is the check result normal?
Go to Step
12.
Repair
the connector.
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Q.
Is the check result normal?
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Replace the rear
blower motor.
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![](../../../img/55/AC313396AC00ENG.png)
![](../../../img/55/AC313427AC00ENG.png)
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- Check the rear blower relay power supply line for
open circuit.
Q.
Is the check result normal?
Go to Step
14.
Repair
the wiring harness.
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![](../../../img/55/AC313429AD00ENG.png)
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Q.
Is the check result normal?
Go to Step
15.
Repair
the connector.
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![](../../../img/55/AC313429AD00ENG.png)
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(1)Disconnect the connector, and
measure at the wiring harness side.
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![](../../../img/55/AC310506AT00ENG.png)
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(2)Continuity between terminal 2
and body earth OK: 2Ω or
less
Q.
Is the check result normal?
Go to Step
17.
Go to Step
16.
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![](../../../img/55/AC313429AD00ENG.png)
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- 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.
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![](../../../img/55/AC313406AH00ENG.png)
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Q.
Is the check result normal?
Go to Step
18.
Repair
the connector.
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![](../../../img/55/AC313428AB00ENG.png)
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- Check the blower linear controller earth line for
open circuit.
Q.
Is the check result normal?
Go to Step
19.
Repair
the wiring harness.
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![](../../../img/55/AC313406AK00ENG.png)
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note |
Prior to the wiring harness
inspection, check intermediate connector C-15,
and repair if necessary.
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- Check the blower linear controller earth 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 rear blower motor
should work normally.
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Q.
Is the check result normal?
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This diagnosis is
complete.
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