2020 Kia Optima Plug-In Hybrid EXFACTORY OEM SERVICE PROCEDURE

Connector Pin Information

WARNING: This page is about a different variant/trim than selected.
No. Connector A Connector B Connector C Connector D
1 Auto light power LIN_Safety power down ECU Front wiper low relay -
2 - - Front wiper low back up switch IGN1
3 - Key IN switch Wiper ON relay Room lamp
4 Heated handle indicator Rear wiper washer switch Rear wiper relay Heated handle power
5 PAS ON indicator Front wiper washer switch Mirror unfold relay IGN2_Heated handle power
6 Safety ECU Enable Heated handle switch Head lamp washer relay Power_ground
7 Rear right seat belt indicator Brake switch - -
8 - - Fog lamp switch -
9 - Key inter lock switch Multifunction light switch -
10 - Sunroof open switch - Battery (+)
11 AST seat belt indicator - - -
12 Pocket lamp PAS (option) switch Front wiper INT volume RPAS power
13 Key hole illumination PAS ON switch Front wiper switch FPAS power
14 ATM solenoid Side airbag (option) - Ground_signal
15 KEY solenoid Rear defogger switch Front wiper high relay -
16 Foot lamp Blade position_Low - -
17 Auto light ground Multifunction switch_ground AV Tail Β 
18 Door lock indicator C_CAN (High) Mirror fold relay
19 - C_CAN (Low) Rear fog lamp relay
20 Security indicator B_CAN (Low) NTC_ground
21 Rear center seat belt indicator B_CAN (High) Head lamp high switch
22 - - Rear wiper switch
23 - LIN_Intrusion protection system ACC IN
24 Rear left seat belt indicator LIN_Rain sensor IGN2
25 Β  LIN_PAS -
26 - Auto light sensor
27 Window lock switch NTC sensor
28 - Crash signal
29 - Β 
30 -
31 -
32 -
Factory Service Tools

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When to See a Mechanic

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

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

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