Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSKIA2021FORTE EXREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASFORWARD COLLISION-AVOIDANCE ASSIST SYSTEM DIAGNOSIS (2 OF 2)DTC C1635-82: TCS INVALID COUNTERWIRING INSPECTIONCIRCUIT INSPECTION

2021 Kia Forte EX

Circuit Inspection

2021 Kia Forte EXSECTION Circuit Inspection

Courtesy of KIA MOTORS AMERICA, INC.

Courtesy of KIA MOTORS AMERICA, INC.

Inspection Condition	(+) Probe		(-) Probe		Specification
Inspection Condition	Connector	Terminal	Connector	Terminal	Specification
Ignition "ON".	SCC (FCA) connector	3 (C-CAN high)	Chassis ground	-	Fig.1
Ignition "ON".	SCC (FCA) connector	2 (C-CAN low)	Chassis ground	-	Fig.1
Ignition "OFF". Disconnect battery (-) cable. Disconnect the electrical connector(s) from the concerned component.	SCC (FCA) connector	3 (C-CAN high)	Chassis ground	-	∞ (infinite)Ω
	SCC (FCA) connector	2 (C-CAN low)	Chassis ground	-	∞ (infinite)Ω
Ignition "OFF". Disconnect the electrical connector(s) from the concerned component.	SCC (FCA) connector	3 (C-CAN high)	HECU connector	19 (C-CAN high)	below 1Ω
	SCC (FCA) connector	2 (C-CAN low)	HECU connector	18 (C-CAN low)	below 1Ω

Courtesy of KIA MOTORS AMERICA, INC.

Good

Check ESC, SCC (FCA) Module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF REPAIR " procedure.
* In case of replacing SCC (FCA) module, perform following "System Inspection" procedure.

No Good

Check for open/short in harness.
Repair as necessary and then go to "VERIFICATION OF REPAIR " procedure.

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.