B3622

Steering Wheel Controls Signal Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Steering wheel buttons don't work
Spontaneous operation of buttons
Check Engine Light or Other Warning Lights Come On

Causes

Open or short circuit in wiring harness
Malfunction of control buttons
Poor contact in connectors
SCCM module damage
Control unit software failure

How to Fix

Check the integrity of the wiring harness from the steering wheel to the SCCM
Inspect connectors for oxidation or damage
Test the multimeter control buttons
Check the power and ground of the signal circuit
Scan the SCCM for errors
Replace damaged components if necessary

Related codes

B3621 B3623 U0121