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.
Height Control Compressor: Inspection
- INSPECT HEIGHT CONTROL COMPRESSOR (EXHAUST VALVE)
- Measure the resistance of the exhaust valve.
- Measure the resistance according to the value (s) in the table below.
Standard resistance
TESTER CONNECTION SPECIFIED CONDITION CHARTTester Connection Condition Specified Condition 1-2 20°C (68°F) 10 to 14 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, replace the height control compressor
- Measure the resistance according to the value (s) in the table below.
- Check the exhaust valve operation.
- Apply battery voltage to the exhaust valve and check the operating sound of the height control valve.
OK
MEASUREMENT SPECIFIED CONDITION CHARTMeasurement Condition Specified Condition Battery positive (+) → Terminal 1
Battery negative (-) → Terminal 2It should make an operating sound (click) If the result is not as specified, replace the height control compressor.
- Apply battery voltage to the exhaust valve and check the operating sound of the height control valve.
- Measure the resistance of the exhaust valve.
- INSPECT HEIGHT CONTROL COMPRESSOR (COMPRESSOR MOTOR)
- Check the compressor operation.
- Apply battery voltage to the compressor motor and check the operation of the height control compressor.
OK
MEASUREMENT SPECIFIED CONDITION CHARTMeasurement Condition Specified Condition Battery positive (+) → Terminal 1 (B)
Battery negative (-) → Terminal 2 (E)Motor operates NOTE:- Do not operate the height control compressor for 60 seconds or more.
- Since a short and a lock-up inside the height control compressor cause excessive current to flow, stop operation immediately when the compressor motor does not operate.
If the result is not as specified, replace the height control compressor.
- Apply battery voltage to the compressor motor and check the operation of the height control compressor.
- Check the compressor operation.
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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.