Sienna AWD V6-3.3L (3MZ-FE) (2004)
a. For the open circuit in the wire harness in Fig. 1, perform a continuity check in step (b) or a voltage check in step (c) to locate the section.
b. Check the continuity.
1. Disconnect connectors A and C and measure the resistance between them.
Resistance: 1 ohm or less
HINT: Measure the resistance while lightly shaking the wire harness vertically and horizontally.
In the case of Fig. 2:
Between terminal 1 of connector A and terminal 1 of connector C -> No continuity (open)
Between terminal 2 of connector A and terminal 2 of connector C -> Continuity
Therefore, the cause is an open circuit between terminal 1 of connector A and terminal 1 of connector C.
2. Disconnect connector B and measure the resistance between the connectors.
In the case of Fig. 3:
Between terminal 1 of connector A and terminal 1 of connector B1 -> Continuity
Between terminal 1 of connector B2 and terminal 1 of connector C -> No continuity (open)
Therefore, the cause is an open circuit between terminal 1 of connector B2 and terminal 1 of connector C.
c. Check the voltage.