Service Manual — page 452 of 715

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12-30 BRAKES
Anti-Lock Brake System
ABS Servicing Precautions
  There are a number of important precautions that should
be followed servicing the ABS system.
○This ABS system is designed to be used with a 12 V
  sealed battery as its power source. Do not use any
  other battery except for a 12 V sealed battery as a power
  source.
○Do not reverse the battery cable connections. This will
  damage the ABS hydraulic unit.
○To prevent damage to the ABS parts, do not disconnect
  the battery cables or any other electrical connections
  when the ignition switch is ON or while the engine is
  running.
○Take care not to short the leads that are directly con-
  nected to the battery positive (+) terminal to the chassis
  ground.
○Do not turn the ignition switch to ON while any of the
  ABS electrical connectors are disconnected. The ABS
  hydraulic unit memorizes service codes.
○Do not spray water on the electrical parts, ABS parts, con-
  nectors, leads and wiring.
○If a transceiver is installed on the motorcycle, make sure
  that the operation of the ABS system is not influenced
  by electric wave radiated from the antenna. Locate the
  antenna as far as possible away from the ABS hydraulic
  unit.
○Whenever the ABS electrical connections are to be dis-
  connected, first turn off the ignition switch.
○The ABS parts should never be struck sharply, as with
  a hammer, or allowed to fall on a hard surface. Such a
  shock to the parts can damage them.
○The ABS parts cannot be disassembled. Even if a fault is
  found, do not try to disassemble and repair the ABS parts,
  replace it.
○The ABS has many brake lines, pipes, and leads. And
  the ABS cannot detect problems with the conventional
  braking system (brake disc wear, unevenly worn brake
  pad, and other mechanical faults). To prevent trouble,
  check the brake lines and pipes for correct routing and
  connection, the wiring for correct routing, and the brakes
  for proper braking power. Be sure to check for fluid leak-
  age, and bleed the brake line thoroughly.