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 GT, AUTOMATIC DCT TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTCOLLISION/AVOIDANCEBLIND-SPOT COLLISION WARNING SYSTEM DIAGNOSISDTC C1646-81: CAN MESSAGE FAILURE - TCUWIRING INSPECTIONCIRCUIT INSPECTIONNOTES
2021 Kia Forte GT, Automatic DCT Trans
Circuit Inspection: Notes
2021 Kia Forte GT, Automatic DCT TransSECTION Notes
| Inspection Condition | (+) Probe | (-) Probe | Specification | ||
|---|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | ||
|
BCW Radar (RH) Connector | 1 (power) | Chassis ground | - | B+ |
| BCW Radar (LH) Connector | 1 (power) | Chassis ground | - | B+ | |
| BCW Radar (RH) Connector | 6 (ground) | Chassis ground | - | Approx. below 1Ω | |
| BCW Radar (LH) Connector | 6 (ground) | Chassis ground | - | Approx. below 1Ω | |
|
ICU Connector | 9 (C-CAN high) | Chassis ground | - | Fig.1 |
| ICU Connector | 10 (C-CAN low) | Chassis ground | - | ||
| ICU Connector | 12 (P-CAN high) | Chassis ground | - | Fig.2 | |
| ICU Connector | 11 (P-CAN low) | Chassis ground | - | ||
Good
- Go to "C-CAN COMMUNICATION LINE INSPECTION " procedure.
No Good
- Repair open or short in circuit and then go to "VERIFICATION OF REPAIR " procedure.
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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.