Pinpoint Test A: Active Engine Mount Test

1. Inspect all the vacuum lines for correct connection and for any damage

Are all the vacuum lines correctly connected and free from damage?

Yes 

GO to  A2.

No 

Reconnect or replace damaged vacuum lines as required and retest

1. Inspect the left and right active engine mount switch positions as shown in the image below

Courtesy of JAGUAR LAND ROVER NORTH AMERICA, LLC

Is the active engine mount switch clearly visible as shown in the image?

Yes 

The active engine mount is faulty, replace only the faulty active engine mount and retest

No 

GO to  A3.

1. Disconnect the vacuum lines directly from the active engine mounts
2. Using the Jaguar Land Rover approved vacuum testing equipment, connect to each active engine mount and check it is holding vacuum. The engine mount should switch before 0.4 bar of vacuum is pulled and then be able to hold the vacuum for 1 minute. There will be an audible pop as the engine mount switches

Did the engine mount switch before 0.4 bar is pulled and hold the vacuum for 1 minute?

Yes 

GO to  A4.

No 

The active engine mount is faulty, replace only the faulty active engine mount and retest

1. Refer to the electrical circuit diagrams and check the active engine mount solenoid circuit for short circuit to ground, open circuit, high resistance. Repair circuit as required and retest

   Did the check and repair of the active engine mount solenoid circuit resolve the issue?

   Yes 

   No further action is required

   No 

   Check and install a new active engine mount solenoid as required and retest. If the fault persists, reconfirm the customer symptoms