Circuit Inspection

WARNING: This page is about a different car, the 2024 Kia Sorento. However, it is still accessible from the selected car via links, so may be relevant.

Courtesy of KIA MOTORS AMERICA, INC.

Courtesy of KIA MOTORS AMERICA, INC.

Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Disconnect the electrical connector(s) from the concerned component. Ignition "ON".	MFC connector	7 (power)	Chassis ground	-	B+
Ignition "OFF". Disconnect the battery (-) terminal. Disconnect the electrical connector(s) from the concerned component.	MFC connector	11 (ground)	Chassis ground	-	Approx. below 1Ω
Ignition "ON". Measure the oscilloscope using the VMI.	ICU connector	20 (C-CAN high)	Chassis ground	-	Fig.1
	ICU connector	19 (C-CAN low)	Chassis ground	-	Fig.1
	ICU connector	31 (E-CAN high)	Chassis ground	-	Fig.2
	ICU connector	32 (E-CAN low)	Chassis ground	-	Fig.2

Courtesy of KIA MOTORS AMERICA, INC.

Courtesy of KIA MOTORS AMERICA, INC.

Good

Go to "C-CAN Inspection" procedure.

No Good

Repair as necessary and then Go to "Verification Of Repair " procedure.

C-CAN Inspection
Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Ignition "OFF". Disconnect the battery (-) terminal. Disconnect the electrical connector(s) from the concerned component.	MDPS unit connector	7 (C-CAN high)	MDPS unit connector	8 (C-CAN low)	Approx. 60Ω
	MDPS unit connector	7 (C-CAN high)	ICU connector	20 (C-CAN high)	Approx. below 1Ω
	MDPS unit connector	8 (C-CAN low)	ICU connector	19 (C-CAN low)	Approx. below 1Ω

Good

Go to "E-CAN inspection" procedure.

No Good

Repair as necessary and then Go to "Verification Of Repair " procedure.

E-CAN Inspection
Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Ignition "OFF". Disconnect the battery (-) terminal. Disconnect the electrical connector(s) from the concerned component.	MFC connector	10 (E-CAN high)	MFC connector	4 (E-CAN low)	Approx. 60Ω
	ICU connector	31 (E-CAN high)	MFC connector	10 (E-CAN high)	Approx. below 1Ω
	ICU connector	32 (E-CAN low)	MFC connector	4 (E-CAN low)	Approx. below 1Ω

Good

Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
Repair or replace as necessary and then Go to "Verification Of Repair " procedure.

No Good

Carefully re-do this troubleshooting guide steps.
If no problems were found with the circuits or connectors, replace the MFC and then Go to "Verification Of Repair " procedure.