Specifications

Check SiBE06-708
144 Service Diagnosis
50 class

Checking the power transistor
z
Never touch any live parts for at least 10 minutes after turning off the circuit breaker.
z
If unavoidably necessary to touch a live part, make sure the power transistor's supply
voltage is below 50 V using the tester.
z
For the UVW, make measurements at the Faston terminal on the board or the relay
connector.
Tester's negative terminal
Power transistor
(+)
UVW
Power transistor
(–)
UVW
Tester's positive terminal UVW
Power transistor
(+)
UVW
Power transistor
(–)
Normal resistance Several k
Ω
to several M
Ω
Abnormal resistance 0 or
∞
W V U
(R5237)