These instructions apply to the Jeep Compass Mk2 (MP) 2017-Present. For other models, please choose your vehicle here.
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Disconnecting the 12 V battery on your Jeep Compass (MP, 2017–present) — to fit a new one, store the car, or work safely near the airbags — takes a couple of precautions, and afterwards several convenience systems need re-initialising. Here’s the safe sequence.
Before You Disconnect
The Compass’s 12 V battery is in the engine bay. On the 4xe plug-in hybrid this 12 V battery is still the one you service — never touch the orange high-voltage cabling or the traction battery.
- Switch the ignition off and note your radio presets and personal settings.
- Ensure all electrical consumers are switched off.
- Wait 1 minute after switching off before disconnecting.
- Disconnect the negative (−) terminal first, then the positive.
Working near airbags or seat-belt pretensioners? Wait 2 minutes after disconnecting before starting work.
Reconnecting and Re-initialising
Reconnect positive first, then negative. With the ignition off and the driver’s door closed, re-initialise the systems the Compass has lost:
- Power windows (one-touch).
- Electric sunroof, if fitted.
- Power tailgate, if fitted.
The clock, radio presets and some settings will also need re-entering.
If Something Isn’t Right Afterwards
- Windows or sunroof only move while held — that’s the lost calibration; run the re-initialisation.
- Warning lights after reconnection often clear after a short drive; a persistent one stores a code (decode on autodtcs.com).
- Fit a like-for-like battery (type and capacity) so the stop/start charging logic works.
Frequently Asked Questions
Where is the battery on a Jeep Compass?
In the engine bay — including on the 4xe, where you still service the 12 V battery, never the high-voltage system.
Which terminal comes off first?
The negative (−) first, and reconnect it last.
What needs resetting after reconnecting?
Windows, sunroof and power tailgate re-initialise, plus the clock and presets.
How long should I wait before disconnecting?
One minute after switch-off; two minutes if working on airbags or pretensioners.
If a warning light stays on after reconnecting, look up the code on autodtcs.com.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
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