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If the blower air volume can not be
changed when the blower switch is operated, the wiring
harness between A/C-ECU and rear heater controller,
and rear power transistor circuit system may be
defective.
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- Malfunction of rear power transistor
- Malfunction of the A/C-ECU
- Damaged harness wires and connectors
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Check whether the air conditioner
sets a diagnosis code or not.
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Q.
Is the check result normal?
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Refer to diagnosis
code chart .
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Carry out the actuator test. (Refer
to .)
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- Item 04: Rear Blower fan: OFF
- Item 05: Rear Blower fan: AUTO <vehicles with
dual automatic A/C>
- Item 06: Rear Blower fan: Lo
- Item 07: Rear Blower fan: Middle
- Item 08: Rear Blower fan: High
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Q.
Does the blower motor work normally?
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Check that the following service
data display contents are normal. (Refer to .)
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- Item 22: Rear blower motor
- Item 23: Rear blower motor (target value)
- Item 32: Rear control OFF SW
- Item 33: Rear control FAN SW
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Q.
Is the check result normal?
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Refer to Inspection
Procedure 16: Rear blower does not work <Vehicle with
rear heater or rear cooler> or
Inspection Procedure 17: Rear blower does not work
<Vehicle with dual automatic A/C> .
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![](../../../img/55/AC313425AB00ENG.png)
![](../../../img/55/AC313427AB00ENG.png)
![](../../../img/55/AC313429AD00ENG.png)
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Q.
Is the check result normal?
Go to Step
5.
Repair
the connector.
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![](../../../img/55/AC313425AB00ENG.png)
![](../../../img/55/AC313427AB00ENG.png)
![](../../../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: 2 ohm or less
Q.
Is the check result normal?
Go to Step
7.
Go to Step
6.
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![](../../../img/55/AC313425AB00ENG.png)
![](../../../img/55/AC313427AB00ENG.png)
![](../../../img/55/AC313429AD00ENG.png)
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- Check the rear window defogger earth line for open
or short 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 or replace
the wiring harness.
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![](../../../img/55/AC313392AK00ENG.png)
![](../../../img/55/AC313406AH00ENG.png)
![](../../../img/55/AC313416AK00ENG.png)
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Q.
Is the check result normal?
Go to Step
8.
Repair
the connector.
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![](../../../img/55/AC313396AC00ENG.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 rear window defogger relay line for open
or short circuit.
Q.
Is the check result normal?
Go to Step
9.
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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Q.
Is the check result normal?
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The trouble can be
an intermittent malfunction (Refer to GROUP 00, How to Cope
with Intermittent Malfunction ).
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