Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Section 452 (Air Conditioning System - Diagnostics): Pre-Check
- Warning for A/C compressor lock:
If compressor lock occurs during A/C operation, the A/C switch indicator on the A/C control assembly starts blinking.
When this occurs, check for compressor lock (DTC 22) using diagnosis trouble code check then proceed to inspect the circuit or the component.
Compressor lock sensor circuit. See DTC 22: COMPRESSOR LOCK SENSOR CIRCUIT .
- List of operation methods:
By operating each of the A/C control switches as shown in Fig 2, it is possible to enter the diagnosis check mode.
- Indicator check:
- Within 5 seconds after turning the ignition switch on, press the A/C switch 3 times and turn the blower switch from OFF to AUTO.
- After the indicator check is ended, the system enters the DTC begins automatically.
- Operate the blower switch from AUTO to except AUTO position when desiring to cancel the check mode.
NOTE:
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.