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.
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HOMESERVICE MANUALSTOYOTA201886 GT, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLVEHICLE STABILITY CONTROL SYSTEM - DIAGNOSTIC CODES & SYMPTOM TESTS
2018 Toyota 86 GT, Standard Trans
Vehicle Stability Control System - Diagnostic Codes & Symptom Tests
2018 Toyota 86 GT, Standard TransSECTION Vehicle Stability Control System - Diagnostic Codes & Symptom Tests
- Vehicle Stability Control System
- Diagnostic Codes
- DTC C1201: Engine Control System Malfunction [06/2016 - ]
- DTC C1225: SA1 Solenoid Circuit; DTC C1226: SA2 Solenoid Circuit; DTC C1227: SA3 Solenoid Circuit; DTC C1228: STR Solenoid Circuit; DTC C1468: SFR Solenoid Circuit; DTC C1469: SFL Solenoid Circuit; DTC C146A: SRR Solenoid Circuit; DTC C146B: SRL Solenoid Circuit [06/2016 - ]
- DTC C1231: Steering Angle Sensor [06/2016 - ]
- DTC C1234: Yaw Rate Sensor; DTC C1419: Acceleration Sensor Internal Circuit; DTC C1472: Acceleration Sensor; DTC C1474: Forward and Rearward G Sensor [06/2016 - ]
- DTC C1237: Speed Sensor Rotor Faulty; DTC C1275: Abnormal Change in Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1276: Abnormal Change in Output Signal of Front Speed Sensor LH (Test Mode DTC); DTC C1277: Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1278: Abnormal Change in Output Signal of Rear Speed Sensor LH (Test Mode DTC) [06/2016 - ]
- DTC C1241: Low or High Power Supply Voltage [06/2016 - ]
- DTC C1246: Master Cylinder Pressure Sensor Malfunction [06/2016 - ]
- DTC C1249: Open in Stop Light Switch Circuit [06/2016 - ]
- DTC C1271: Low Output Signal of Front Speed Sensor RH (Test Mode DTC); DTC C1272: Low Output Signal of Front Speed Sensor LH (Test Mode DTC); DTC C1330: Open in Front Speed Sensor RH; DTC C1331: Open in Front Speed Sensor LH; DTC C1464: Front Speed Sensor RH; DTC C1465: Front Speed Sensor LH [06/2016 - ]
- DTC C1273: Low Output Signal of Rear Speed Sensor RH (Test Mode DTC); DTC C1274: Low Output Signal of Rear Speed Sensor LH (Test Mode DTC); DTC C1332: Open in Rear Speed Sensor RH; DTC C1333: Open in Rear Speed Sensor LH; DTC C1466: Rear Speed Sensor RH; DTC C1467: Rear Speed Sensor LH [06/2016 - ]
- DTC C1288: Error in Matching of ECUs [06/2016 - ]
- DTC C1294: ECT System Malfunction [06/2016 - ]
- DTC C1300: Skid Control ECU Malfunction [06/2016 - ]
- DTC C146C: Open in ABS Motor Relay Circuit [06/2016 - ]
- DTC C146E: Open in ABS Solenoid Relay Circuit [06/2016 - ]
- DTC C1492: Clutch Switch OFF Stuck; DTC C1493: Clutch Switch ON Stuck [06/2016 - ]
- DTC C1494: Reverse Switch OFF Stuck; DTC C1495: Reverse Switch ON Stuck [06/2016 - ]
- DTC U0073: Control Module Communication Bus "A" Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0140: Lost Communication with Main Body ECU [06/2016 - ]
- Symptom Tests
- ABS Warning Light Remains ON [06/2016 - ]
- ABS Warning Light does not Come ON [06/2016 - ]
- Brake Warning Light Remains ON [06/2016 - ]
- Brake Warning Light does not Come ON [06/2016 - ]
- TRAC OFF Indicator Light Remains ON [06/2016 - ]
- TRAC OFF Indicator Light does not Come ON [06/2016 - ]
- VSC OFF Indicator Light Remains ON [06/2016 - ]
- VSC OFF Indicator Light does not Come ON [06/2016 - ]
- TRACK Indicator Light Remains ON [06/2016 - ]
- TRACK Indicator Light does not Come ON [06/2016 - ]
- Slip Indicator Light Remains ON [06/2016 - ]
- Slip Indicator Light does not Come ON [06/2016 - ]
- Circuit Tests
- Diagnostic Codes
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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.