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Climate Control System Symptom Troubleshooting - The blower and the heater controls and the A/C system do not work
The blower and the heater controls and the A/C system do not work
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1. |
Fuse check:
Fuse check
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?1. |
Check the following fuse.
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Fuse |
No. D9 (10 A) |
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Location |
Under-dash fuse/relay box | |
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Is the fuse OK?
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Replace the fuse, and recheck. If the fuse blows again, repair a short in the No. D9 (10 A) fuse circuit.? |
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2. |
Open wire check (IG2 A/C line):
Open wire check (IG2 A/C line)
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?1. |
Disconnect the following connector.
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Climate control unit connector A (32P) | |
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?2. |
Turn the vehicle to the ON mode. |
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?3. |
Measure the voltage between test points 1 and 2.
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Test condition |
Vehicle ON mode |
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Climate control unit connector A (32P): disconnected |
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Test point 1 |
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Test point 2 |
Body ground | |
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Is there battery voltage?
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The IG2 A/C wire is OK. Go to step 3. |
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Repair an open in the IG2 A/C wire.? |
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3. |
Open wire check (GND line):
Open wire check (GND line)
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?1. |
Turn the vehicle to the OFF (LOCK) mode. |
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?2. |
Check for continuity between test points 1 and 2.
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Test condition |
Vehicle OFF (LOCK) mode |
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Climate control unit connector A (32P): disconnected |
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Test point 1 |
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Test point 2 |
Body ground | |
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Is there continuity?
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Check for an open in the GND wire. If the wire is OK, check for poor ground at G402.? | |