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Quiescent Current Measurement

WARNING: This page is about a different car, the 2011 Jaguar XKR, 2011 Jaguar XK, 2010 Jaguar XKR, and 2010 Jaguar XK. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: The following quiescent current measurement does not apply to vehicles with the Tracker system installed. If the vehicle is installed with the tracker system the quiescent current may be up to 14 milliamps higher. If non-jaguar approved accessories are installed the following measurements may not apply.
  1. Disconnect the battery ground cable. See SPECIFICATIONS . .
  2. Check the vehicle off-load battery voltage. If below 12.5 volts, install a fully charged slave battery for the tests and recharge the vehicle battery.
  3. Connect a 'shorting' link lead between the negative battery terminal and the negative battery lead, before connecting a suitable ammeter to the battery (with the negative test lead clip to the negative battery terminal, and the positive test lead clip to the battery negative lead).
    4. NOTE: Make sure that all electrical accessories are switched off.
  4. Operate the key fob unlock button to disarm the vehicle security system.
    • Select ignition mode (without starting the engine) for around 10 seconds.
    • Deselect ignition mode, close doors, hood & luggage compartment lid latch.
    • Lock vehicle.
    • After 15 minutes on vehicles with TPMS installed or 4 minutes on vehicles without TPMS installed, remove shorting link & note ammeter reading.
    • The quiescent current should be less than 35mA.
    • Replace Shorting link.
    • Unlock the vehicle.
    • Superlock the vehicle.
    • After 15 minutes, on vehicles with TPMS installed, or 4 minutes, on vehicles without TPMS installed, remove shorting link & note ammeter reading.
    • The quiescent current should be less than 35mA.
    5. NOTE: In the unlocked state, the vehicle will take 30mins to shut down to its min quiescent current.
  5. If intermittent wake-ups are suspected, monitor battery current continuously
  6. Disconnect the ammeter. Reconnect the battery ground cable. See SPECIFICATIONS . .
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