Chime Input #2 Circuit Short to Ground
The chime speaker circuit is shorted to ground, preventing the chime from sounding properly. Think of it like a light switch that's stuck in the off position due to a broken wire touching the ground.
The ECU monitors the voltage on the chime input circuit #2, expecting a normal high voltage state when inactive. When the circuit shorts to ground, the voltage drops to 0V, signaling a fault condition. The ECU compares this against expected thresholds to detect the short.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Chime Input #2 Voltage | 12V (battery voltage or high state) | 0V or near 0V (shorted to ground) |
| Circuit Resistance | >1000 ohms (open/normal) | <10 ohms (short condition) |
Code B1898 is a low-severity fault. Your vehicle is generally safe to drive to a workshop for diagnosis. However, do not ignore it indefinitely — low-severity codes often indicate developing problems that become expensive if neglected. Book a diagnostic appointment within 2–4 weeks. If you notice any additional symptoms (rough running, power loss, unusual smells), treat it as higher priority.
Once the fault is repaired, B1898 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.