B1654: Driver Seat Recline Circuit Short to Ground
The B1654 code indicates that the Driver Seat Module (DSM) or Seat Control Module (SCM) has detected a short to ground in the seatback recline rearward control circuit. This prevents the seatback from moving rearward and typically disables the recline function to protect the module and wiring from damage.
1. Commonly Affected Makes
2. Most Common Causes
- Short to ground in the recline rearward circuit wiring (often gray/red wire, verify with diagram)
- Driver seat recline motor with internal winding shorted to ground
- Faulty DSM/SCM with internal driver shorted to ground
- Corroded, bent, or moisture-bridged terminals in the motor or module connector
- Seat adjustment switch (door or side panel) with internal failure on the recline rearward contact
3. Symptoms You Will Notice
- Seatback does not recline rearward
- Recline function may be completely disabled
- Seat adjustment switch may feel normal but no movement occurs
4. Step-by-Step Diagnosis
Scan for B1654 and check for related codes
Inspect the recline rearward circuit wiring (gray/red wire) for shorts to chassis
Test the recline motor resistance and check for continuity to ground
Check the seat adjustment switch for internal shorts
Inspect connectors for bent pins, corrosion, or moisture
If all else passes, suspect a faulty DSM/SCM
5. Frequently Asked Questions
Is it safe to drive?▼
Yes, it is generally safe to drive, but the seat recline function will be disabled. Avoid adjusting the seat aggressively to prevent further damage.
How much does it cost to fix?▼
Repair costs range from $100 to $400 depending on the cause. Wiring repairs are cheaper ($100-$200), while replacing the seat motor or module can cost $200-$400.