Body Control Unit (BCU)

CONTROL UNITS AND RELAYS

REPAIRS

86-3-3

Body Control Unit (BCU) 

$% 86.55.75 

If the BCU is to be replaced then Testbook/T4 must 
be connected and correct procedures adhered to, 
prior to battery disconnection.

Before disconnecting the battery, ensure all text and 
cautions in the battery disconnection section are 
observed. 
 

 + 

 GENERAL INFORMATION, Electrical 

Precautions.

Remove

1. Make the SRS system safe. 

 + 

 GENERAL INFORMATION, 

Supplementary Restraint System (SRS) 
Precautions.

2. Remove front passenger seat.

 + 

 SEATS, REPAIRS, Front seat.

3. Release 2 turnbuckles securing cover and 

remove cover.

4. Release and disconnect 3 multiplugs from 

BCU.

5. Remove BCU.

Refit

1. Fit BCU and connect multiplugs.
2. Fit cover and secure with turnbuckles.
3. Fit front seat.

 + 

 SEATS, REPAIRS, Front seat.

4. Configure new BCU using TestBook/T4.

M86 5719