IS 250 AWD V6-2.5L (4GR-FSE) (2006)
1. In a circuit in which voltage is applied to the ECU connector terminal, an open circuit can be checked by conducting a voltage check. With
each connector still connected, measure the voltage between the body ground and these terminals (in this order): 1) terminal 1 of connector A,
2) terminal 1 of connector B, and 3) terminal 1 of connector C.
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.
Check For Short Circuits
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.
b. Check the resistance with the body ground.
1. Disconnect connectors A and C and measure the resistance.
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.