Electronic Control Unit Damage Can Result From Improper Battery Connection (ITB09-020)

Publication date: 2009-04-06
Reference number: ITB09-020

ELECTRONIC CONTROL UNIT DAMAGE CAN RESULT FROM IMPROPER BATTERY CONNECTION

TECHNICAL SERVICE BULLETIN

Reference Number(s): ITB09-020, Date of Issue: April 6, 2009

The vehicle 12 volt battery is an important part of the vehicle electrical system and is required to stay connected when the engine is running.
To prevent damage to vehicle electronic components follow the instructions/cautions below.

IMPORTANT: Damage to electronic components (ECM, TCM, BCM, etc.) due to improper battery connection will not be covered under warranty.

CAUTION:

Make sure the ignition is OFF during battery service and replacement.
Do not disconnect or connect any battery cables while the ignition switch is turned ON.
When disconnecting a battery, always disconnect the negative cable first. When connecting a battery, always connect the positive cable first.
Do not leave a battery cable loose. Tighten battery cables immediately after attachment.
If a battery cable is loose, do not operate any electrical loads.
(This includes turning the ignition ON, starting the engine, operating accessories such as the A/C system, power seats, interior lights, exterior lights etc.).
When "jump starting" or "boosting" a battery - be careful. Don't accidentally reverse the polarity of the cables.