System Description: Description

The alternator provides DC voltage to operate the vehicle's electrical system and to keep the battery charged. The voltage output is controlled by the IC regulator.

Power is supplied at all times

• through 10A fuse [No. 36, located in the fuse, fusible link and relay block (J/B)]
• to alternator terminal 4 ("S" terminal).

  "B" terminal supplies power to charge the battery and operate the vehicle's electrical system. Output voltage is controlled by the IC regulator at terminal 4 ("S" terminal) detecting the input voltage.

  The alternator is grounded to the engine block.

  With the ignition switch in the ON or START position, power is supplied

  • through 10A fuse [No. 14, located in the fuse block (J/B)]
  • to combination meter terminal 12 for the charge warning lamp.

  Ground is supplied at signal

  • to combination meter terminal 22
  • through alternator terminal 3 ("L" terminal).

  Then power and ground are supplied, the charge warning lamp will illuminate.

  When the alternator is providing sufficient voltage with the engine running, the ground is opened and the charge warning lamp will go off.

  If the charge warning lamp illuminates with the engine running, a malfunction is indicated.

  Ground is supplied

  • to alternator terminal 2 ("E" terminal)
  • through grounds E222, E223 and E224. (VQ35DE)
  • through ground E212. (VK45DE)

  MALFUNCTION INDICATOR 

  The IC regulator warning function activates to illuminate the charge warning lamp, if any of the following symptoms occur while alternator is operating:

  • Excessive voltage is produced.
  • No voltage is produced.