CLIMATE CONTROL UNIT DOES NOT STORE INFORMATION [FULL-AUTO AIR CONDITIONER]
CLIMATE CONTROL UNIT DOES NOT STORE INFORMATION [FULL-AUTO AIR CONDITIONER]
SM2335672
id0703c1005900
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Troubleshooting item |
Climate control unit does not store information |
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Description
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• When ignition is switched ON (engine off or on), climate control unit activated with set temperature at 22 °C {72 °F} while in AUTO
• Past malfunction code is not stored in climate control unit
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Possible cause
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• Climate control unit malfunction
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• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harnesses are connected correctly and undamaged.
Diagnostic Procedure
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Step |
Inspection |
Action |
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1*
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INSPECT CLIMATE CONTROL UNIT POWER SUPPLY CIRCUIT FOR SHORT TO GROUND AND OPEN CIRCUIT
• Inspect the power supply circuit for an open circuit and short to ground. (See CIRCUIT INSPECTION.)
• Is the circuit normal?
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Yes
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Replace the climate control unit, then go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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Repair completion verification
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VERIFY THAT MALFUNCTION SYMPTOM DOES NOT RECUR AFTER REPAIR
• Does the climate control unit store information normally?
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Yes
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Troubleshooting completed.
Explain repairs to customer.
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No
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
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