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The blower system, the compressor system or the communication system between the engine-ECU
and the A/C-ECU may be defective if there is no cool air coming from the spit hole.
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- Malfunction of air thermo sensor
- Malfunction of dual pressure switch
- Damaged harness wires and connectors
- Malfunction of engine-ECU
- Malfunction of the automatic A/C control panel (A/C-ECU)
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Check that the air selection switch, rear window defogger switch and air volume control
dial can operate.
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Q.
Is the check result normal?
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Inspection Procedure 9: Refer to A/C-ECU power supply system .
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Q.
Is the check result normal?
Go to Step 3.
Repair the connector.
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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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(3)Disconnect engine-ECU connector C-105 and earth terminal 40.
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(4)Voltage between terminal 1 and body earth. OK: System voltage
Q.
Is the check result normal?
Go to Step 4.
Refer to Inspection Procedure 5 " The compressor does not work ".
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Check that the blower motor operates under the following conditions.
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- ignition switch: ON
- Blower speed selection dial: MAX
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Q.
Is the check result normal?
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Refer to Inspection Procedure 2 " The blower does not work ".
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Q.
Is the check result normal?
Go to Step 6.
Repair the connector.
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Q.
Is the check result normal?
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Replace the dual pressure switch.
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Q.
Is the check result normal?
Go to Step 8.
Repair the connector.
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- Check the input line for open circuit.
Q.
Is the check result normal?
Go to Step 9.
Repair the wiring harness.
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Q.
Is the check result normal?
Go to Step 10.
Repair the connector.
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note |
Prior to the wiring harness inspection, check intermediate connector C-54, and repair
if necessary.
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- Check the input line for open circuit.
Q.
Is the check result normal?
Go to Step 11.
Repair the wiring harness.
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note |
Prior to the wiring harness inspection, check intermediate connector A-28, and repair
if necessary.
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- Check the input line for open circuit.
Q.
Is the check result normal?
Go to Step 12.
Repair the wiring harness.
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note |
Prior to the wiring harness inspection, check intermediate connector C-53, and repair
if necessary.
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- Check the input line for open circuit.
Q.
Is the check result normal?
Go to Step 13.
Repair the wiring harness.
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Q.
Is the refrigerant level correct?
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Correct the refrigerant level (Refer to On-vehicle Service .)
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Check that the compressor works normally.
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Q.
Is the check result normal?
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This diagnosis is complete.
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