B1773 Code: Meaning, Symptoms, Causes & Fix

Overview

B1773 is triggered when monitoring logic identifies an issue with Mirror Driver Up Circuit Failure affecting body electronics and comfort modules.

Symptoms

feature inoperative intermittently
module resets or glitches
related warning lamp illuminated

Common causes

Disconnected or loose connector affecting mirror driver up circuit failure
Broken terminal inside harness
Connector pin damage/corrosion or harness stress near related components

How to diagnose B1773

Confirm B1773 and capture freeze-frame data with a professional scan tool.
Inspect wiring, connectors, and grounds related to mirror driver up circuit failure for obvious defects.
Use a continuity test from module pin to component to identify opens/high resistance.
Check for related DTCs to identify the root-cause chain before replacing parts.
After repair, clear codes and confirm readiness monitors complete without recurrence.

Severity of code B1773

Moderate: This code is moderate severity: the vehicle may still operate, but fault progression can increase repair cost over time.

Can you drive with B1773?

Most vehicles can be driven short-term with B1773, but postpone heavy load/highway driving until repaired.

If the warning lamp is flashing or drivability/safety is affected, avoid driving and diagnose immediately.

How to fix it (step-by-step)

Repair obvious wiring/connector faults first to prevent repeat parts replacement.
Address the root fault mode (open) in the mirror driver up circuit failure circuit/system.
Apply the required relearn/adaptation procedure if specified by service information.
Road-test and verify B1773 remains cleared under the conditions that originally set the code.

Fix options

Repair open circuit and secure connector lock.
Clear corrosion and protect terminals.
Clear DTCs and verify with live data and completed drive cycle.

Typical repair cost

$160-$850

Common mistakes when diagnosing B1773

Replacing parts without verifying voltage, ground, and signal integrity first.
Ignoring related stored/pending codes that indicate upstream faults.
Skipping post-repair verification drive cycle and readiness checks.

B1773 in common vehicles

B1773 appears across makes such as Nissan, Hyundai, Kia, Volkswagen. Failure patterns differ by platform: wiring routes, software calibration, and component supplier revisions can change root cause.

Frequently asked questions

What causes B1773?

B1773 is commonly set by open faults affecting mirror driver up circuit failure.

How much does it cost to fix B1773?

For B1773, repair costs are typically $160-$850 depending on exact root cause, labor rates, and part quality.

Can I clear B1773 without repair?

You can clear B1773 temporarily, but the code usually returns until the underlying fault is corrected.