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.
2018 Subaru BRZ Limited, Automatic TransFACTORY OEM SERVICE PROCEDURE
Unit Inspection
- Inspection of intake air flow meter SUB-ASSY
- Use a working lamp, visually check the platinum filament (heater) portion of the intake air flow meter SUB-ASSY for foreign matter.
Criteria: No foreign matter
NOTE: If there is a foreign matter on the platinum filament (heater), replace the intake air flow meter SUB-ASSY. - Inspection of intake temperature sensor resistance
- Measure the resistance between the terminals.
- Use a working lamp, visually check the platinum filament (heater) portion of the intake air flow meter SUB-ASSY for foreign matter.
STANDARD VALUE RESISTANCE SPECIFICATION
| Inspection terminals | Inspection conditions | Standard value |
|---|---|---|
| 1 - 2 | -20°C {-4°F} | 13.6 to 18.4k Ω |
| 20°C {68°F} | 2.21 to 2.69k Ω | |
| 60°C {140°F} | 0.49 to 0.67k Ω |
Factory Service Tools
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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.
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