B1E4B

Symptoms

• The third row seat does not fold or folds only partially
• The rear hatch does not open or close electrically
• You hear a clicking or buzzing sound when you try to operate the system
• Malfunction light on the instrument panel
• Delay in mechanism activation
• The mechanism starts but then stops

Causes

• Oxidation or corrosion of contacts in the wiring harness connector
• Broken or damaged control circuit wiring
• Faulty seat folding solenoid or motor
• Loose contact in BCM connector
• Incorrect voltage in the on-board network (low battery)
• System control relay malfunction
• Mechanical jamming of the seat or hatch (increased resistance)
• BCM internal fault

How to Fix

1. Connect an OBD-II scanner and read the full list of error codes for analysis
2. Check battery voltage (should be 12.6-14.2 V) and battery condition
3. Visually inspect the control circuit wiring harness for damage, kinks, or insulation cracks.
4. Check all connectors (BCM, relay, solenoid, motor) for oxidation and poor contact.
5. Clean contacts with alcohol or a special contact cleaner
6. Check the resistance of the solenoid or electric motor with a multimeter (compare with the standard values ​​in the manual)
7. Check for voltage on the circuit when the folding/unfolding command is given
8. Mechanically check seat or sunroof travel for jamming
9. If necessary, replace a faulty solenoid, motor or relay
10. If problem persists, replace BCM
11. Clear the error code and test drive to confirm the fix

Related codes

FAQ