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 Crosstrek Base, Automatic CVT TransFACTORY OEM SERVICE PROCEDURE
Diagnostic Method
Judge as NG when the following conditions are established.
JUDGMENT VALUE SPECIFICATION
| Malfunction Criteria | Threshold Value |
|---|---|
| (1) Instruction value | Different from expected value |
| (2) Process flow result | The result and expected value do not match. |
| (3) High integrated IC motor continuity cut demand | Yes |
| (4) Communication between output driver ICs | Communication failure |
| (5) Writing value to CAN register | Not equal to the reading value |
| (6) Absolute throttle position - Absolute throttle position memory when monitoring | 1.6% or more |
| (7) Data written in CPU | Not equal to expected value |
| (8) Data written in register | Not equal to the reading value |
| (9) Diagnostic value Formula when sampling time is 8ms | 1, 900 kW or more |
| DV = Ξ£[(Actual engine power - target engine power) - Map] | Β |
MAP SPECIFICATION
| Vehicle speed (km/h (MPH)) | 0 (0) | 10 (6.25) | 20 (12.5) | 30 (18.75) | 40 (25) | 50 (31.25) | 60 (37.5) | 70.4 (43.75) | 80.5 (50) | 91 (56.25) | 101 (62.5) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Engine output (kW) | 26 | 26 | 26 | 26 | 30 | 40 | 60 | 85 | 120 | 160 | 200 |
Time needed for diagnosis:Β
- 1:2 times
- 2:8 time (s)
- 504ms
- 48ms
- 2500ms
- Less than 1 s
- 24ms
- 2 times
- 64time (s)
- Less than 1 s
Malfunction indicator light illumination:Β Illuminates as soon as a malfunction occurs.
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.