Circuit Inspection

WARNING: This page is about a different car, the 2017 Kia Niro. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: WPC System Circuit

Courtesy of KIA MOTORS AMERICA, INC.

Inspection Condition	(+) Probe			(-) Probe			Specification
Inspection Condition	Channel	Connector	Terminal	Channel	Connector	Terminal	Specification
Ignition "ON" & Engine "OFF".	CH-A	PSM	Pin No. 6 (B-CAN High)	CH-A	Chassis ground	-	Fig 2
Ignition "ON" & Engine "OFF".	CH-B	PSM	Pin No. 7 (B-CAN Low)	CH-B	Chassis ground	-	Fig 2

Fig 2: Screen Display - Normal B-CAN (High & Low) Signal Waveform - Time Frame; 1MS

Courtesy of KIA MOTORS AMERICA, INC.

Good	Disconnect B-CAN communication units one by one and monitor DTC to find the cause. If the DTC is erased, check for proper operation. If the problem is corrected, replace the unit and go to "VERIFICATION OF REPAIR " procedure.
No Good	Check for open, short to battery/ground in B-CAN line. Repair as necessary, go to "VERIFICATION OF REPAIR " procedure.