Check Short Circuit

If the wire harness is ground shorted as in Fig 1, locate the section by conducting a "continuity check with ground".

Fig 1: Checking Continuity With Ground

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Check the continuity with ground.

1. Disconnect connectors "A" and "C" and measure the resistance between terminal 1 and 2 of connector "A" and body ground.

   In the case of Fig 2:

   Between terminal 1 of connector "A" and body ground --> Continuity (short)

   Between terminal 2 of connector "A" and body ground --> No continuity

   Therefore, it is found out that there is a short circuit between terminal 1 of connector "A" and terminal 1 of connector "C".

   Fig 2: Measuring Resistance Between Terminal 1 And 2 Of Connector "A" And Body Ground

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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.

   In the case of Fig 3:

   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".

   Fig 3: Measuring Resistance Between Terminal 1 Of Connector "A" And Body Ground

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002