Quiescent Current Testing

• Switch ignition to 'on' or select ignition mode in keyless vehicles and switch to 'off' (do not crank)
• Remove key from ignition switch (if equipped)
• Open and latch all doors, hood and luggage compartment lid
• Lock the vehicle using the remote function on the remote handset. (Single lock only to avoid volumetric alarm arming)
• Remove any other potential electrical drains such as accessories plugged into accessory sockets
• Record the amperage readings after the shutdown period referenced in the Topix on line resource for details. Note all cars from 10MY onwards and XK from 07MY and XF from 08MY should be less than 30mA after 30 minutes
• Record the final reading on the battery report form

The preferred method of testing following an excessive current consumption figure is to use a current probe around individual junction box leads to the various suspected circuits to identify a potential cause. This is in preference to the old method of removing fuses for the following reasons:

• The drain may be caused by a module remaining active and preventing the quiescent drain from reducing to normal levels
• The drain may be caused by a relay winding that is activated. Pulling the fuse can allow this to 'reset' and the drain will be lost and go un-diagnosed