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.

Inspection Item	Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Item	Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Power inspection (high voltage output cable)	Ignition "OFF". High voltage cut-off switch "OFF". Wait 5 minutes. Connect the voltage tester to the high voltage output cable (+), (-). High voltage cut-off switch "ON". EV "Ready".	High voltage output cable	(+)	High voltage output cable	(-)	Approx. 360V (cell voltage: Approx. 3.75V)
Power inspection (Current sensor ↔ Chassis ground)	Disconnect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - VCC)	Chassis ground	-	Approx. 5V
Voltage inspection (Current sensor ↔ Chassis ground)	Disconnect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - high range)	Chassis ground	-	Approx. 0V
Voltage inspection (Current sensor ↔ Chassis ground)	Disconnect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - low range)	Chassis ground	-	Approx. 0V
Voltage inspection (Current sensor ↔ Chassis ground)	Disconnect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - ground)	Chassis ground	-	Approx. 0V
Power inspection (Current sensor ↔ Chassis ground)	Connect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - VCC)	Chassis ground	-	Approx. 5V
Voltage inspection (Current sensor ↔ Chassis ground)	Connect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - high range)	Chassis ground	-	Approx. 2.5V
Voltage inspection (Current sensor ↔ Chassis ground)	Connect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - low range)	Chassis ground	-	Approx. 2.5V
Voltage inspection (Current sensor ↔ Chassis ground)	Connect the connector(s) from current sensor. Ignition "ON".	Current sensor connector	(PRA current sensor - ground)	Chassis ground	-	Approx. 0V
Open in circuit inspection (BMU ↔ Current sensor)	Ignition "OFF". Disconnect the connector(s) from BMU and current sensor.	Current sensor connector	(PRA current sensor - ground)	BMU connector	(PRA current sensor - ground)	Approx. below 1Ω
Voltage inspection (BMU ↔ Chassis ground)	EV "Ready".	BMU connector	(PRA current sensor - high range)	Chassis ground	-	Refer to Table 1
Voltage inspection (BMU ↔ Chassis ground)	EV "Ready".	BMU connector	(PRA current sensor - low range)	Chassis ground	-	Refer to Table 1

Low range channel

LOW RANGE CHANNEL - OUTPUT VOLTAGE CHARGING OR DISCHARGING SPECIFICATION

Low current (A)	Output Voltage (V)
-50	0.5
-25	1.5
0	2.5
25	3.5
50	4.5

High range channel

High current (A)	Output Voltage (V)
-500 (charging)	0.5
-250 (charging)	1.5
0	2.5
250 (discharging)	3.5
500 (discharging)	4.5

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 the applicable trouble shooting.
Check for open to the signal circuit linking the current sensor and BMS ECU. If any fault, repair or replace as necessary and then Go to "Verification Of Repair ".
If there is nothing wrong with the wire harness and connectors and the problem persists, replace the PRA or current sensor and then Go to "Verification Of Repair ".
If there is nothing wrong with the wire harness and connectors and the problem persists, replace the BMS ECU or current sensor and then Go to "Verification Of Repair ".