Circuit Inspection

WARNING: This page is about a different car, the 2021 Kia Soul. 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.

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".	BCW radar (RH)	7 (ON/START Input)	Chassis ground	-	B+
	BCW radar (LH)	7 (ON/START Input)	Chassis ground	-	B+
Ignition "OFF". Disconnect the electrical connector(s) from the concerned component.	BCW radar (RH)	4 (ground)	Chassis ground	-	Approx. below 1Ω
	BCW radar (LH)	4 (ground)	Chassis ground	-	Approx. below 1Ω
Connect the electrical connector(s) from the concerned component. Ignition "ON".	ICU	9 (C-CAN high)	Chassis ground	-	Fig.1
	ICU	10 (C-CAN low)	Chassis ground	-	Fig.1
	ICU	12 (P-CAN high)	Chassis ground	-	Fig.2
	ICU	11 (P-CAN low)	Chassis ground	-	Fig.2

Courtesy of KIA MOTORS AMERICA, INC.

Courtesy of KIA MOTORS AMERICA, INC.

Good

Go to "CAN Communication Line Inspection" procedure.

No Good

Repair open or short in circuit and then go to "Verification of Repair " procedure.

CAN Communication Line Inspection
Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Ignition "OFF". Disconnect the battery. Disconnect the electrical connector(s) from the concerned component.	BCW radar (LH)	5 (C-CAN high)	BCW radar (LH)	1 (C-CAN low)	Approx. 60Ω
	ICU	9 (C-CAN high)	ICU	10 (C-CAN low)	Approx. 60Ω
	BCW radar (LH)	5 (C-CAN high)	ICU	9 (C-CAN high)	Approx. below 1Ω
	BCW radar (LH)	1 (C-CAN low)	ICU	10 (C-CAN low)	Approx. below 1Ω
	ICU	12 (P-CAN high)	ECM/PCM	77 (P-CAN high) - PCM 85 (P-CAN high) - ECM	Approx. below 1Ω
	ICU	11 (P-CAN low)	ECM/PCM	60 (P-CAN low) - PCM 63 (P-CAN low) - ECM	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.
Repair open or short in circuit and then go to "Verification of Repair " procedure.
If no problems were found with the circuits or connectors, replace the ICU or ECM/PCM and go to "Verification of Repair " procedure.