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 MANUALSTOYOTA20254RUNNER SR5, 4WDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (2 OF 2)SUSPENSION CONTROL DTCSADAPTIVE VARIABLE SUSPENSION SYSTEM
2025 Toyota 4Runner SR5, 4WD
Adaptive Variable Suspension System
2025 Toyota 4Runner SR5, 4WDSECTION Adaptive Variable Suspension System
ADAPTIVE VARIABLE SUSPENSION SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1715-12 | Front Right Vertical Acceleration Sensor Circuit Circuit Short to Battery |
| C1715-14 | Front Right Vertical Acceleration Sensor Circuit Circuit Short to Ground or Open |
| C1716-12 | Front Left Vertical Acceleration Sensor Circuit Circuit Short to Battery |
| C1716-14 | Front Left Vertical Acceleration Sensor Circuit Circuit Short to Ground or Open |
| C1717-12 | Rear Vertical Acceleration Sensor Circuit Circuit Short to Battery |
| C1717-14 | Rear Vertical Acceleration Sensor Circuit Circuit Short to Ground or Open |
| C1731-12 | Front Right Damping Force Control Actuator Circuit Circuit Short to Battery |
| C1731-14 | Front Right Damping Force Control Actuator Circuit Circuit Short to Ground or Open |
| C1732-12 | Front Left Damping Force Control Actuator Circuit Circuit Short to Battery |
| C1732-14 | Front Left Damping Force Control Actuator Circuit Circuit Short to Ground or Open |
| C1733-12 | Rear Right Damping Force Control Actuator Circuit Circuit Short to Battery |
| C1733-14 | Rear Right Damping Force Control Actuator Circuit Circuit Short to Ground or Open |
| C1734-12 | Rear Left Damping Force Control Actuator Circuit Circuit Short to Battery |
| C1734-14 | Rear Left Damping Force Control Actuator Circuit Circuit Short to Ground or Open |
| C1781-04 | ECU Malfunction System Internal Failure |
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message |
| U0101-87 | Lost Communication with TCM Missing Message |
| U0125-87 | Lost Communication with Multi-axis Acceleration Sensor Module "A" Missing Message |
| U0126-87 | Lost Communication with Steering Angle Sensor Module Missing Message |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message |
| U0293-87 | Lost Communication with Hybrid/EV Powertrain Control Module Missing Message |
| U0300-57 | Internal Control Module Software Incompatibility Invalid / Incompatible Software Component |
| U1103-87 | Lost Communication with Stop and Start Control Module Missing Message |
| U1171-87 | Lost Communication with Brake System Control Module (ch3) Missing Message |
| U1303-57 | Software Incompatibility with Stop and Start Control Module Invalid / Incompatible Software Component |
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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.