Sienna FWD V6-3.5L (2GR-FE) (2009)
If the results match the examples above, an open circuit exists in the wire harness between terminal 1 of connector B and terminal 1 of
connector C.
3. CHECK FOR SHORT CIRCUIT
(a) If the wire harness is ground shorted (Fig. 5), locate the section by conducting a resistance check with the body ground (below).
(b) Check the resistance with the body ground.
(1) Disconnect connectors A and C and measure the resistance.
Standard resistance (Fig. 6):
HINT: Measure the resistance while lightly shaking the wire harness vertically and horizontally. If your results match the examples above, an
open circuit exists between terminal 1 of connector A and terminal 1 of connector C.
(2) Disconnect connector B and measure the resistance.
Standard resistance (Fig. 7):
If the results match the examples above, a short circuit exists between terminal 1 of connector B2 and terminal 1 of connector C.
4. CHECK AND REPLACE ECU
NOTICE:
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The connector should not be disconnected from the ECU. Perform the inspection from the backside of the connector on the wire harness
side.
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When no measuring condition is specified, perform the inspection with the engine stopped and the ignition switch to the ON position.
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Check that the connectors are fully seated. Check for loose, corroded or broken wires.