B051A

Left Side Assist Step Motor Control Circuit

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$56–167 (est.)

Symptoms

Left side step does not work
Intermittent system operation
The fault indicator lights up

Causes

Open or short circuit in wiring harness
Stepper motor fault
Problems with the control unit
Oxidation of contacts in connectors
Fuse or relay failure

How to Fix

Check the integrity of the wiring harness
Inspect connectors for oxidation
Check the operation of the stepper motor
Diagnose the control unit
Replace faulty components

Related codes

B051B B051C B051D