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If a power supply is not provided
to the A/C-ECU, the A/C-ECU power supply system
or the earth system may be defective.
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- Malfunction of the A/C-ECU
- Damaged harness wires and connectors
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![](../../../img/55/AC313406AB00ENG.png)
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Q.
Is the check result normal?
Go to Step
2.
Repair
the connector.
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![](../../../img/55/AC313406AB00ENG.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/AC310507BI00ENG.png)
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(3)Measure the voltage between
terminal 6 and body earth. OK: System
voltage
Q.
Is the check result normal?
Go to Step
4.
Go to Step
3.
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![](../../../img/55/AC313399AE00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-01 and
junction block connector C-205 and C-202, and
repair if necessary.
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- Check the A/C-ECU 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/AC313406AB00ENG.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/AC310507BJ00ENG.png)
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(3)Measure the voltage between
terminal 5 and body earth. OK: System
voltage
Q.
Is the check result normal?
Go to Step
6.
Go to Step
5.
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![](../../../img/55/AC313404AB00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-01 and
intermediate connector C-125, and repair if
necessary.
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- Check the A/C-ECU 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/AC313406AB00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side.
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![](../../../img/55/AC310507BK00ENG.png)
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(2)Measure the voltage between
terminal 4 and body earth. OK: System
voltage
Q.
Is the check result normal?
Go to Step
8.
Go to Step
7.
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![](../../../img/55/AC313404AB00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-31 and
intermediate connector C-125, and repair if
necessary.
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- Check the rear fan switch 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/AC313406AB00ENG.png)
|
(1)Disconnect the connector, and
measure at the wiring harness side.
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![](../../../img/55/AC310506AU00ENG.png)
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(2)Continuity between terminal 7
and body earth OK: 2Ω or
less
Q.
Is the check result normal?
Replace the
A/C-ECU.
Go to Step
9.
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![](../../../img/55/AC313407AR00ENG.png)
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note |
Prior to the wiring harness
inspection, check joint connector C-01, and
repair if necessary.
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- Check the A/C-ECU 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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