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GROUND PLATE DISCONNECTION/CONNECTION

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Caution

• When servicing the following parts, disconnect the ground plate. Otherwise, the Mazda M Hybrid related parts could be damaged. (See Ground Plate Disconnection/Connection.)

― Integrated starter generator (ISG)

― DC-DC converter (Mazda M Hybrid)

― Seat warmer control unit (With seat warmer system/without position memory system)

― Position memory control module (With position memory system)

― Front seat (driver's side) (With position memory system)

― Front seat (passenger's seat) (With seat warmer system/without position memory system)

― Relay and fuse block (With seat warmer system)

• Do not store the ground plate while it is installed to the Mazda M Hybrid battery. If the ground plate is installed while the Mazda M Hybrid battery is malfunctioning (internal relay stuck), the insulation effect may not be obtained and could result in a short circuit.

Ground plate disconnection necessity verification procedure

1. Perform the DTC inspection. (See DTC INSPECTION.)

• If DTC P0AA1:00 is displayed, disconnect the ground plate. (See Ground Plate Disconnection/Connection.)

2. Switch the ignition OFF.

3. Disconnect the negative battery terminal and wait for 1 min or more. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION [(E)].)

4. Verify that voltage is not applied using a tester.

• If voltage is applied, disconnect the ground plate. (See Ground Plate Disconnection/Connection.)

• If the voltage is 1.0 V or less, it is not necessary to disconnect the ground plate.