Toyota Supra JZA80

Check short circuit

If the wire harness is ground shorted as in Fig. 5, locate the section by conducting a ”continuity check with ground”.

  1. Continuity Check with Ground
    1. Disconnect connectors (A) and (C) and measure the resistance between terminals 1 and 2 of connector (A) and body ground.
      In the case of Fig. 6,
      Between terminal 1 of connector (A) and body ground → Continuity
      Between terminal 2 of connector (A) and body ground → No continuity (open)
      Therefore, it is found out that there is a short circuit between terminal 1 of connector (A) and terminal 1 of connector (C).
    2. Disconnect connector ”B” and measure the resistance between terminal 1 of connector ”A” and body ground, and terminal 1 of connector ”B2” and body ground.
      Between terminal 1 of connector ”A” and body ground → No continuity
      Between terminal 1 of connector ”B2” and body ground → Continuity (short)
      Therefore, it is found out that there is a short circuit between terminal 1 of connector ”B2” and terminal 1 of connector ”C”.
This guide is based on the book edition Toyota (RM502U, 1997)

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