NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0]

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Warning

•  Before removing the SRS air bag system-related parts, always disconnect the negative battery cable terminal and wait for 1 min. or more to allow the back-up power supply to deplete its stored power. (See AIR BAG SYSTEM SERVICE WARNINGS.)

Caution

•  With the battery connected and the ignition switched ON, or if servicing is performed for a long period (10 min or more) with the ignition switched off.

Required procedure after negative battery cable disconnection/connection

System name		Conditions after disconnecting the negative battery cable	Required procedure		Reference
			Before disconnecting negative battery cable	After connecting negative battery cable
Power window system		Initial setting is reset and auto-function is disabled.	—	Perform the power window system initial setting.	(See POWER WINDOW SYSTEM INITIALIZATION PROCEDURE.)
Clock and audio		Clock display and audio system memory are reset.	Verify the setting content.	Perform setting to the content verified before disconnecting negative battery cable.	—
i-stop control		Specified information in the PCM is cleared and the i-stop does not operate normally.	Verify PID “BATT_SOC” value and record it. *1	Perform battery condition initial learning (i-stop learning). *2	(See BATTERY CONDITION INITIALIZATION LEARNING (i-stop LEARNING) [SKYACTIV-G 2.0].)
Steering angle sensor initial point	AFS control module	Initial setting is reset and the system may not operate properly.	—	Perform steering angle sensor initialization.	(See STEERING ANGLE SENSOR INITIALIZATION PROCEDURE.)

Negative Battery Cable Terminal Disconnection

1.  Connect the M-MDS to the DLC-2.

2.  Switch the ignition ON (engine off).

3.  Verify the “BATT_SOC” value using the M-MDS data logger function. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0].)

4.  Record the “BATT_SOC” value.

“BATT_SOC” value is less than 75%

•  Inspect the battery. (See BATTERY INSPECTION [SKYACTIV-G 2.0].)

“BATT_SOC” value is 75% or more

•  Go to the next step.

5.  Switch the ignition off.

Caution

•  If the nut for the current sensor is loosened with the negative battery cable terminal connected to the battery, excessive torque will be applied to the negative battery cable terminal and the battery terminal will be damaged. When removing the negative battery cable terminal and current sensor, be careful not to damage the battery terminal.

•  Be careful not to contact the positive battery cable terminal.

6.  Disconnect the current sensor connector.

Note

•  The positive battery cable nut cannot be removed to prevent it from falling off.

7.  Disconnect the negative battery cable terminal.

•  When disconnecting the plastic deformed negative battery cable, expand the gap of the negative battery terminal using a flathead screwdriver, and remove the nut.

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Negative Battery Cable Terminal Connection

Caution

•  Connect the negative battery cable before connecting the current sensor connector. If the current sensor connector is connected first, the PCM may mistakenly recognize a signal from the current sensor and learn the battery condition incorrectly.

•  Verifying the tightness while holding the current sensor may apply excessive force to the terminal and the terminal could loosen, causing poor engine starting. When verifying the tightness of the negative battery cable terminal, only hold the terminal area, not the current sensor.

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1.  Perform battery condition initial learning (i-stop learning). (See BATTERY CONDITION INITIALIZATION LEARNING (i-stop LEARNING) [SKYACTIV-G 2.0].)

Note

•  Connection of the negative battery cable terminal and the current sensor connector will be done in the battery condition initial learning (i-stop learning) procedure.

2.  Perform services not related to i-stop control which are required after connecting the negative battery cable terminal. (See Required procedure after negative battery cable disconnection/connection.)