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.
2004 Acura TL AutomaticFACTORY OEM SERVICE PROCEDURE
DTC Troubleshooting: Notes
DTC TROUBLESHOOTING INDEX
| DTC | Description |
|---|---|
| DTC B1802 | Power Seat Control Unit Internal Error (EEPROM error) |
| DTC B1805 | Power Seat Control Unit Lost Communication with Gauge Control Module (VSP/NE signal) |
| DTC B1806 | Power Seat Control Unit Lost Communication with MICU (MICU Message) |
| DTC B1807 | Power Seat Control Unit Lost Communication with MICU (Door Switch Message) |
| DTC B1808 | Power Seat Control Unit Lost Communication with Gauge Control Module (A/T Message) |
| DTC B1809 | Power Seat Control Unit Lost Communication with Door Multiplex Control Unit (Memory Switch Message) |
| DTC B1825 | Slide Motor Pulse Error |
| DTC B1826 | Front Up-down Motor Pulse Error |
| DTC B1827 | Rear Up-down Motor Pulse Error |
| DTC B1828 | Recline Motor Pulse Error |
| DTC B1829 | A/T P Signal and VSS Signal Mismatch |
| DTC B1830 | Right Mirror Horizontal Sensor Malfunction |
| DTC B1831 | Right Mirror Vertical Sensor Malfunction |
| DTC B1832 | Left Mirror Horizontal Sensor Malfunction |
| DTC B1833 | Left Mirror Vertical Sensor Malfunction |
| DTC B1834 | M/T Harness Poor Ground |
| DTC B1837 | Power Seat Position Memory Recall Error |
| DTC B1843 | Power Seat Control Unit lost communication with other units (UART communication error) |
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:
- • 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.