GS 450h V6-3.5L (2GR-FSE) Hybrid (2007)
(3) Using the intelligent tester, check the waveform.
Standard waveform
If the input signal is abnormal, there is a malfunction in the ECM or cooling fan ECU.
If the output current is abnormal even when the input signal is normal, there is a malfunction in the cooling fan ECU (SI) or motor.
(b) Check the cooling fan motor.
(c)
Check the cooling fan motor operation.
(1) Disconnect the B3 cooling fan ECU connector.
(2) Connect the battery to the cooling fan ECU of terminal 3 (+B1) and 1 (E1).
If they do not operation, replace the cooling fan ECU.