Disconnect Negative Lead-Acid Battery Terminal

WARNING:

• Before removing the SRS air bag system-related parts, always disconnect the negative lead-acid battery terminal and wait for 1 min or more to allow the back-up power supply to deplete its stored power.
• Contact with the positive lead-acid battery 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 lead-acid battery terminal when performing the procedure.

CAUTION:

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

1. Verify that the charge cable is not connected to the charging port.
   • If the charge cable is connected to the charging port, remove the charge cable.
2. Keep the driver's door open.
3. Keep the hood open.
4. Keep the main power switched ON (READY on) for 3 s or more.
5. Switch the main power OFF and start measuring the time since the main power was switched OFF using a stopwatch.
   CAUTION:

   • If the cooling fan does not stop after 5 min have elapsed since the main power was switched OFF, wait until it stops.
   • If the [Battery cooling] operation notification is displayed on the center display, do not make a selection and leave it as it is.
6. Switch the main power OFF and wait for 5 min.
   WARNING:

   • Before servicing after disconnecting the negative lead-acid battery terminal, wait for 1 min or more.
   CAUTION:

   • If the time since the main power was switched OFF in Step 5 to the disconnection of the negative lead-acid battery terminal exceeds 25 min, perform the procedure from Step  3 again.
   NOTE:

   • In order to prevent it from falling off, the negative lead-acid battery terminal nut cannot be removed.
   • After the negative lead-acid battery is disconnected, there is no restriction on opening/closing the door.
7. Disconnect the negative lead-acid battery terminal within 25 min from switching the main power OFF in Step 5 using the following procedure.
   1. Disconnect the current sensor connector.
   2. Disconnect the negative lead-acid battery terminal.
      • When disconnecting a negative lead-acid battery terminal with deformed plastic, expand the gap of the negative lead-acid battery terminal using a flathead screwdriver, and remove the terminal.

Fig 1: Negative Lead-Acid Battery Terminal Nut With Torque Specification

Courtesy of MAZDA MOTORS CORP.

TIGHTENING TORQUE SPECIFICATION

Symbol	Content
	5 N.m {51 kgf.cm, 44 in.lbf}