Kia Optima: Smart Key System / Smart Key Unit

Kia Optima DL3 2019-2021 Service and Repair Manual / Body Electrical System / Smart Key System / Smart Key Unit

Schematic diagrams
Connector and Terminal Function

Pin
Function
Connector A
Connector B
Connector C
Connector D
1
-
Front washer switch (Output)
-
Driver outside handle switch (Input)
2
Rear seat belt indicator_Left (Output)
-
ESCL Enable (Output)
Assist outside handle switch (Input)
3
-
-
ESCL - (Output)
-
4
-
-
-
-
5
External buzzer (Output)
-
-
RPM (Input)
6
Rear seat belt indicator_Center (Output)
Wiper parking switch (Input)
-
SSB symbol illumination (+) (Output)
7
Puddle pocket lamp (Output)
-
ESCL Unlock switch (Input)
ACC relay (Output)
8
Rear seat belt indicator_Right (Output)
Brake switch (Input)
-
IGN1 relay (Output)
9
-
-
-
IGN2 relay (Output)
10
Headlamp high switch (Input)
Front wiper volume switch (Input)
ESCL + (Output)
Starter relay (Output)
11
-
-

Assist outside handle antenna (+) (Output)
12
-
LIN4 (Safety ECU)
Interior antenna 2 (+) (Output)
13
Rear view switch (Input)
PAS Option (Input)
Trunk interior antenna 3 (+) (Output)
14
-
-
Interior antenna 1 (+) (Output)
15
RPAS Power (Output)
B-CAN (Low)
Bumper antenna (+) (Output)
16
FRAS Power (Output)
B-CAN (High)
Driver outside handle antenna (+) (Output)
17
PAS/RPAS Power (Input)
-
-
18
-
Ground (Power)
-
19
-
-
-
20
Ground (ECU)
Immobilizer power (Output)
-
21
-
Immobilizer ground (Output)
SSB switch 1 (Input)
22
K-Line_Immobilizer
-
SSB switch 2 (Input)
23
-
PAS/RPAS Switch indicator (Output)
Clutch IGN lock switch
24
-
Front wiper switch (Input)
ESCL COM
25
Sunroof status (Input)
-
Wheel speed sensor (Input)
26
PAS/RPAS Switch (Input)
Multifunction switch ground (Input)
-
27
ATM Solenoid (Output)
Wiper power relay (Output)
-
28
LIN3 (Rain sensor)
Auto light sensor ground (Output)
-
29
LIN2 (ROA)
Auto light sensor signal (Input)
-
30
LIN1 (PDW-F or PDW-R)
Auto light sensor power (Output)
Start feed back (Input)
31
Door unlock signal (For IFU) EMS (Output)
-
Assist outside handle antenna (-) (Output)
32
Light switch (Input)
Front wiper high relay (Output)
Interior antenna 2 (-) (Output)
33
Fog switch (Input)
Front wiper low relay (Output)
Trunk interior antenna 3 (-) (Output)
34
IGN2 (Input)
Front wiper low backup switch (Input)
Interior antenna 1 (-) (Output)
35
IGN1 (Input)
P-CAN (Low)
Bumper antenna (-) (Output)
36
ACC (Input)
P-CAN (High)
Driver outside handle antenna (-) (Output)
37
Battery + (ECU)

-
38
Battery + (Power)
-
39
-
-
40
Front heated nozzle (Output)
'P' Position (input)

Repair procedures
Removal

Integrated Body control Unit (IBU)

1.

Remove the IBU.

(Refer to Body Electrical System - "Integrated Body Control Unit")

Door Outside Handle

1.

Remove the front door outside handle.

(Refer to Body - "Front Door Outside Handle")

Trunk Open Switch

1.

Remove the center rear combination lamp.

(Refer to Lighting System - "Rear Combination Lamp")

2.

Disconnect the trunk open switch connector (A).

3.

Remove the rear view camera (A) by loosening the mounting screws.

4.

Remove the trunk open switch (A) by pressing the hooks.

Buzzer

1.

Disconnect the negative battery terminal.

2.

Remove the front bumper assembly.

(Refer to Body - "Front Bumper assembly")

3.

Remove the buzzer (B) after disconnecting the connector (A).

Installation
1.

Install in the reverse order of removal.

Inspection

Integrated Body control Unit (IBU)

1.

Inspect the IBU by using the KDS.

(Refer to Smart Key System - "Smart Key Diagnostic")

Door Outside Handle

1.

Remove the front door outside handle.

(Refer to Body - "Front Door Outside Handle")

2.

Disconnect the front door outside handle connector and then check for continuity between terminals No 3 and No 6.

Pin
Function
1
Power (Antenna)
2
Battery (+) (Pocket lamp)
3
Power (Switch)
4
Ground (Antenna)
5
Ground (Pocket lamp)
6
Ground (Switch)

Trunk Open Switch

1.

Disconnect the negative battery terminal.

2.

Remove the trunk lid trim.

(Refer to Body - "Trunk Lid Trim")

3.

Check for continuity between the terminals.

[RVM Camera Type]

[SVM Camera Type]

Buzzer

1.

Disconnect the negative battery terminal.

2.

Remove the front bumper assembly.

(Refer to Body - "Front Bumper assembly")

3.

Disconnect the buzzer connector (A).

4.

Test the buzzer by connecting battery power to the terminal 2 and ground the terminal 1.

Smart Key
Repair procedures Adjustment Smart Key Code Saving 1. Connect the VCI II in driver side crash pad lower panel, turn the power on KDS. 2. Sel ...

Smart Key Antenna
Repair procedures Removal Interior Antenna 1 1. Disconnect the negative battery terminal. 2. Remove the surround view monitor (SVM) unit. (Refer ...

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