Land Rover L322 Service Procedures & Auto Repair Manuals

CONTROL UNITS AND RELAYS

REPAIRS

86-3-1

CONTROL UNITS AND RELAYS

REPAIRS

Electronic control unit (ECU) - trailer

$% 86.55.07 

If the ECU 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. Disconnect battery earth lead.
2. Remove access panel from load space RH trim 

casing.

3. Remove 2 nuts securing trailer ECU.
4. Release and disconnect multiplug.
5. Remove trailer ECU.

Refit

1. Position trailer ECU and connect multiplug.
2. Fit trailer ECU and secure with nuts.
3. Fit access panel.
4. Connect the battery earth lead.
5. Configure new ECU using TestBook/T4.

Relay - horn

$% 86.55.09

Remove

1. Remove glove box.

 + 

 INTERIOR FITTINGS, REPAIRS, 

Glove box.

2. Remove horn relay.

Refit

1. Fit horn relay.
2. Fit glove box.

 + 

 INTERIOR FITTINGS, REPAIRS, 

Glove box.

M86 5729