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Integrated Power Module and Smart Junction Box Diagnosis Assessment
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If a B1392 code sets in a Ford Smart Junction Box, it must be replaced.
True
False
Rest voltage for CAN communication should read:
0.0v
2.5v
5.0v
12.0v
What is a quick way to see if a relay is replaceable?
check the schematic
look up the part number
see if it is green
read the label
The vehicle from the wiring diagram below cranks but will not start. While cranking, the voltage measurement shown was taken. This indicates:
Wiring Diagram
Open in ECM relay coil
Blown fuse 53
No ground for the ECM relay
Shorted ECM relay contacts
The benefits of using an FET in place of a relay are:
less voltage drop
current limiting
less voltage needed
reduced heat
A Dodge truck has one headlamp out. No voltage is being supplied to the bulb by the TIPM. It could be caused by:
open bulb
open ground at load
bad headlamp switch
shorted supply wire
Which of the following inputs are not used to determine power mode on GM vehicles:
Ignition 1 voltage
Accessory voltage
Off/Run/Crank voltage
Immobilizer data
On a vehicle with a CAN bus, the resistance between pins 6 and 14 in the DLC should be:
40 ohms
60 ohms
120 ohms
240 ohms
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