Kia Optima: Body Electrical System / Multifunction Switch

Kia Optima DL3 2019-2020 Service and Repair Manual / Body Electrical System / Multifunction Switch

Specifications
Specifications

Items
Specifications
Rated voltage
Front fog lamp switch
5 V
Lighting
Auto lighting
Dimmer & Passing
Turn signal lamp
Wiper
Washer
14.5 V

Schematic diagrams
Connector and Terminal Function

Connector A

Pin
Standard
R-MDPS
1
-
-
2
Headlamp low back up signal
Headlamp low back up signal
3
Front wiper INT volume signal
-
4
Ground
-
5
Ground (IBU)
Ground
6
Front wiper switch signal
-
7
Front wiper low back up signal
Front wiper low back up signal
8
IGN2
IGN2
9
Front washer motor switch power
Front washer motor switch power
10
Light switch signal
C-CAN (High)
11
-
C-CAN (Low)
12
Fog lamp switch signal
IGN1
13
Headlamp passing/high beam switch signal
-
14
Turn signal switch (LH)
B-CAN (High)
15
Turn signal switch (RH)
B-CAN (Low)
16
-
Battery (+)

Repair procedures
Removal
1.

Disconnect the negative battery terminal.

2.

Remove the steering column upper and lower shrouds.

(Refer to Body - "Steering Column Shroud Panel")

3.

Remove the steering wheel.

(Refer to Steering System - "Steering Wheel")

4.

Disconnect the all connector (A) from the multifunction switch.

5.

Remove the multifunction switch (B) by loosening the mounting bolt (A).

Tightening torque :

7.8 - 8.8 N·m (0.8 - 0.9 Kgf·m, 5.8 - 6.5 lb·ft)

  

When install the multifunction switch, unscrew and reassemble the clamp bolt (A) to check for sound.

Installation
1.

Install in the reverse order of removal.

Inspection

Multifunction Switch Inspection

1.

Disconnect the negative battery terminal.

2.

Remove the steering column upper and lower shrouds.

(Refer to Body - "Steering Column Shroud Panel")

3.

Check for continuity between the terminals in each switch position as shown below.

Switch
Switch position
Switch terminal
Resistance (Ω, ±3.5%)
Front wiper switch
MIST
6-4
330
OFF

INT (AUTO)
800
LOW
1800
HIGH
5700
Wiper intermittent volume
Volume 1
3-4
330
Volume 2
690
Volume 3
1310
Volume 4
2610
Volume 5
7310
Fog lamp switch
OFF
12-4

Front
910
Rear
2910
Turn signal switch (Left)
OFF
14-4

Lanechange
910
Full turn
2910
Turn signal switch (Right)
OFF
15-4

Lanechange
910
Full turn
2910
Dimmer & Passing switch
OFF
13-4

Passing
910
Dimmer
2910
Light switch
OFF
10-4
680
AUTO

Tail lamp
1680
Low beam
5580

Diagnosis With KDS

1.

In the body electrical system, failure can be quickly diagnosed by using the vehicle diagnostic system (KDS).

The diagnostic system (KDS) provides the following information.

(1)

Self diagnosis : Checking failure and code number (DTC)

(2)

Current data : Checking the system input/output data state

(3)

Actuation test : Checking the system operation condition

(4)

Additional function : Controlling other features including system option setting and zero point adjustment

2.

Select the "Car model" and the 'IBU-BCM' to be checked in order to check the vehicle with the tester.

Standard : BCM - MFSW

R-MDPS : BCM - MFSW (DN8)

3.

Select the 'Current Data' menu to search the current state of the input/output data.

4.

To force actuate the input value of the module to be checked, select option 'Actuation Test'.

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