NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION

2016 – MX-5 – Engine

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 [TWO-STEP DEPLOYMENT CONTROL SYSTEM].) (See AIR BAG SYSTEM SERVICE WARNINGS [STANDARD DEPLOYMENT CONTROL SYSTEM].)
Contact with the positive battery cable terminal could cause electrocution due to a short circuit and result in serious injury or death, or damage to vehicle parts. Do not contact the positive battery terminal when performing the procedure.

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.
If a door is opened/closed after disconnecting the negative battery cable, the door interlock open/close may not function and the door glass may be damaged. Always disconnect the negative battery cable with the doors on both sides opened.

System name	Conditions after disconnecting the negative battery cable	Required procedure		Reference
		Before disconnecting negative battery cable	After connecting negative battery cable
Clock and audio	Clock display and audio system memory are reset.	Verify the setting content.	Set the verified content before disconnecting negative battery cable.	—
Tire pressure monitoring system (TPMS)	The tire pressure monitoring system detection accuracy decreases.	—	Perform the tire pressure monitoring system initialization.	(See TIRE PRESSURE MONITORING SYSTEM INITIALIZATION PROCEDURE.)

1. Switch the ignition off.

2. Disconnect the negative battery cable.

CAUTION:

When tightening the negative battery cable, tighten it to the specified torque. If it is not tightened to the specified torque, the battery charging/discharging may be affected. (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

1. Connect the negative battery cable terminal.

2. Perform services which are required after connecting the negative battery cable terminal. (See Required Procedure After Negative Battery Cable Terminal Disconnection/Connection.)