Hyundai Elantra CN7: Indicators And Gauges

Seventh generation (CN7; 2021–2024) / Hyundai Elantra CN7 2021-2024 Workshop Manual / Body Electrical System / Indicators And Gauges

Troubleshooting

Error Item

Failure symptom

Inspection items

Detailed inspections

Relevant Parts/
Components

Screen display

TFT-LCD screen does not turn on

1)	Connector attachments

2)	Components

1)	Check the connector attachments

2)	Check B+, IGN and GND wiring

3)	Check the components

Connectors, wiring, fuses, dashboard

Warning light

Airbag warning lamp malfunction

1)	Connector attachments

C-CAN

3)	Components

1)	Check airbag + signal (connectors)

2)	Check C-CAN (ACU4) signal

3)	Check the FPC attachment inside the dashboard

ACU Connectors, wiring, fuses, dashboard

Mode conversion

Integrated driving mode malfunction

1)	Connector attachments

Switch

3)	Components

1)	Check the switch input (connector)

2)	Check the switch signal input (disconnection or shorting)

3)	Check conversion with dashboard component

Switch connector, wiring dashboard

Illumination

Interior light brightness cannot be controlled.

1)	Connector attachments

Switch

3)	Components

1)	Check if the light switch's input signal reaches the connector

2)	Check ILL- and DETENT signals

3)	Check the TAIL+ signal input

Switch connector, wiring dashboard

Warning Sound

No dashboard alarm

1)	Connector attachments

2)	Car speakers

3)	Components

1)	Check the speaker output connector

2)	Check the car speakers

Speaker connectors, wiring dashboard

Fuel indicator

Faulty fuel gauge indication

1)	Connector attachments

2)	Fuel sender

3)	Components

1)	Check fuel input and GND connectors (open, short or input resistance values)

2)	Check fuel sender

Fuel sender connector, wiring dashboard

Instrument Cluster

Description and operation

Description

Abbreviation	Expalnation
ACU	Airbag Control Unit
ADM	Assist Door Module
B_CAN	Body Controller Area Network
BCM	Body Control Module
BCW	Blind-Spot Collision Warning
C_CAN	Chassis Controller Area Network
CLU	Cluster Module
DATC	Dual Automatic Temp Control
DDM	Driver Door Module
ESC	Electronic Stability Program
EMS	Engine Management System
LKAS	Lane Keeping Assist System
M_CAN	Multi media Controller Area Network
MDPS	Motor Driven Power Steering
P_CAN	Powertrain Controller Area Network
PSM	Power Seat Module
SAS	Steering Angle Sensor
SJB	Smart Junction Block
SMK	Smart Key Unit
PDW	Parking Distance Warning
TCU	Transmission Control Unit
TPMS	Tire Pressure Monitoring System
VDC	Vehicle Dynamic Control
TMU	Telematics System
ABS	Anti-lock Brake System

Cluster Variant Coding

As we have more options (ESC, MDPS, SCC, etc.) in the car, the dashboard now have more information to display depending on the chosen options.

For this reason, we need to learn which options the current vehicle when we replace the dashboard.

To address this issue, a course of learning based on the option required for the vehicle when replacing the dashboard should be carried out.

This is called Variant Coding.

Function

High speed CAN communication (C-CAN)

–	Custom Function : Boarding interlocking sheets, Welcome Light

–	LDWS : Lane Departure Warning System

–	SPAS: Smart Parking Assist System

Low speed CAN communication (MM-CAN)

–	AV : Audio / Video Multimedia information Display

–	TBT : Turn By Turn Navigation Information Display

3.	Sound output Instrument cluster and the external speakers connected to the output of the various beeps and sound effects. If External AMP is applied, the directional alarm is outputted through the amp. [Standard Type]

User Setting Mode (USM)

Setting can be changed by using switchs (Menu, UP, Down and OK button). There are many items (for example, In/Out Seat Synchronization, In/Out Steering Wheel Synchronization, Auto Door Lock, Auto Door Lock Deactivate, Head Lamp Escort, Welcome Light, Welcome Sound, One Touch Turn Signal, Average Fuel Consumption Auto Reset, Brightness, and Content Setup) that can be set and customized. The signal flow during setting is as follows.

(1)	UMS settings are set, they are transmitted to BCM.

(2)	BCM transmits the settings via B_CAN to the relevant modules.

(3)	The module completes setting and transmits the modified setting to BCM.

(4)

BCM transmits the final settings via C_CAN to the cluster.

•	The cluster communicates directly with C-CAN units.

Components and components location

Components

4.2" TFT LCD

10.25" TFT LCD

Connector Pin Information

No	Description	No	Description
1	GND	21	Trip switch (-)_Input
2	Illumination (-)	22	Trip switch 1 (+)_Input
3	Rheostat switch (Down)_Input	23	Trip switch 2 (+)_Input
4	Rheostat switch (Up)_Input	24	Low washer level_input
5	Dentent	25	Driver mode switch_Input (AT only)
6	AT ('P' Position)	26	-
7	AT ('R' Position)	27	-
8	AT ('N' Position)	28	MT ('N' Position)
9	AT ('D' Position)	29	Multimedia-CAN (Low)
10	AT ('S' Position)	30	Multimedia-CAN (High)
11	Immobilizer_Input	31	Engine run state_output
12	Vehicle speed_Input	32	Chassis-CAN (High)
13	Alternator_Input	33	Chassis-CAN (Low)
14	Fuel sender (+)_Input	34	Auto lever manual (+)_input
15	Vehicle speed_Output	35	Auto lever manual (-)_input
16	Fuel sender (-)_Input	36	-
17	Water Separator_Input	37	GND
18	-	38	-
19	Oil press switch_Input	39	IGN 1
20	-	40	Battery (+)

Schematic diagrams

Circuit Diagram

4.25 TFT LCD

10.25 TFF LCD

Repair procedures

Removal

•	Put on gloves to protect your hands.

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

10.25 TFF LCD [RHD]

•	Put on gloves to protect your hands.

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

1.	Disconnect the negative (-) battery terminal.

2.	Using a flat-tip screwdriver or remover, remove the photo sensor cover (A).

3.	Disconnect photo sensor connector and security sensor connector (A).

4.	Using a flat-tip screwdriver or remover, remove the steering column shroud upper panel (A).

5.	Using a flat-tip screwdriver or remover, remove the cluster fascia upper garnish (A).

6.	Remove the cluster fascia side panel after mounting screws. (Refer to Body - "Cluster Fascia Side Panel")

7.	Remove the instrument cluster (A) after loosening the mounting screws.

8.	Remove the instrument cluster after disconnect cluster connectors.

4.2 TFF LCD [RHD]

•	Put on gloves to protect your hands.

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

1.	Disconnect the negative (-) battery terminal.

2.	Using a flat-tip screwdriver or remover, remove the photo sensor cover (A).

3.	Disconnect photo sensor connector and security sensor connector (A).

4.	Using a flat-tip screwdriver or remover, remove the steering column shroud upper panel (A).

5.	Using a flat-tip screwdriver or remover, remove the cluster fascia upper garnish (A).

6.	Remove the cluster fascia side panel (A) after mounting screws.

7.	Remove the cluster fascia panel (A) after loosening mounting screws.

8.	Remove the instrument cluster (A) after loosening mounting screws.

9.	Remove the instrument cluster after disconnect cluster connectors.

10.25 TFF LCD [LHD]

•	Put on gloves to protect your hands.

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

1.	Disconnect the negative (-) battery terminal.

2.	Using a flat-tip screwdriver or remover, remove the photo sensor cover (A).

3.	Disconnect photo sensor connector and security sensor connector (A).

4.	Using a flat-tip screwdriver or remover, remove the steering column shroud upper panel (A).

5.	Using a flat-tip screwdriver or remover, remove the cluster fascia upper garnish (A).

6.	Remove the cluster fascia side panel after mounting screws. (Refer to Body - "Cluster Fascia Side Panel")

7.	Remove the instrument cluster (A) after loosening the mounting screws.

8.	Remove the instrument cluster after disconnect cluster connectors.

4.2 TFF LCD [LHD]

•	Put on gloves to protect your hands.

•	When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.

1.	Disconnect the negative (-) battery terminal.

2.	Using a flat-tip screwdriver or remover, remove the photo sensor cover (A).

3.	Disconnect photo sensor connector and security sensor connector (A).

4.	Using a flat-tip screwdriver or remover, remove the steering column shroud upper panel (A).

5.	Using a flat-tip screwdriver or remover, remove the cluster fascia upper garnish (A).

6.	Remove the cluster fascia side panel (A) after mounting screws.

7.	Remove the cluster fascia panel (A) after loosening mounting screws.

8.	Remove the instrument cluster (A) after loosening mounting screws.

9.	Remove the instrument cluster after disconnect cluster connectors.

Installation

10.25 TFT LCD

1.	Install the cluster after connecting the cluster connector.

2.	Install the cluster fascia upper garnish.

3.	Install the steering column shroud upper panel.

4.	Install the photo sensor cover.

5.	Connect the negative (-) battery terminal.

•	Perform variant coding after exchanging the instrument cluster.

10.25 TFT LCD

1.	Install the cluster after connecting the cluster connector.

2.	Install the cluster fascia panel.

3.	Install the cluster fascia upper garnish.

4.	Install the steering column shroud upper panel.

5.	Install the photo sensor cover.

6.	Connect the negative (-) battery terminal.

•	Perform variant coding after exchanging the instrument cluster.

Inspection

Check point (Warning indicator)

•	Fault conditions and normal operating conditions, refer to the owner's manual.

Ref Symbol

Name

Color

Signal input

Signal Control

Check point

Turnsignal (Left)

Green

CAN

BCM
(Gateway)

1)	Multifunction Switch

BCM

3)	CAN Failure

Turnsignal (Right)

Green

CAN

BCM
(Gateway)

1)	Multifunction Switch

BCM

3)	CAN Failure

Tail Lamp

Green

CAN

BCM
(Gateway)

1)	Multifunction Switch

BCM

3)	CAN Failure

Fog Lamp

Green

CAN

BCM
(Gateway)

1)	Multifunction Switch

BCM

3)	CAN Failure

Rear Fog Lamp

Yellow

CAN

IGPM
(Gateway)

1)	Multifunction Switch

IBU

IGPM

4)	CAN Failure

High Beam

Blue

CAN

BCM
(Gateway)

1)	Multifunction Switch

BCM

3)	CAN Failure

Warning

Yellow

CAN

BSD

1)	BSD System

2)	CAN Failure

TPMS

1)	TPMS System

2)	CAN Failure

SCC

1)	SCC System

2)	CAN Failure

LDWS

1)	LDWS System

2)	CAN Failure

FCW

1)	FCW System

2)	CAN Failure

HBA

1)	HBA System

2)	CAN Failure

BCM

1)	Exterior Lamp

BCM

3)	CAN Failure

Hard-wired

Low Washer

1)	Whasher fluid lever sensor

2)	Wiring Failure

Digital Input

Reminders when service checks

Battery Charge

Red

Hard-wired

Alternator

1)	Alternator

2)	Wiring Failure

Battery

Oil Pressure

Red

Hard-wired

ECM

1)	Oil Pressure Sensor

2)	Wiring Failure

ECM

4)	CAN Failure

Check Engine

Yellow

CAN

ECM

2)	CAN Failure

Immobilizer

Yellow

CAN
+
Hard-wired

IMMOBILIZER
SMK

1)	Immobilzer System

SMK

BCM

4)	CAN Failure

5)	Hard-wired

Parking Brake
Brake Fluid
EBD
EPB
EVP

Red

CAN

BCM
(Gateway)
EBD
EPB
EVP
ABS
TCS

BCM

2)	ABS System

3)	EPB System

4)	CAN Failure

5)	Parking Brake Switch

6)	Brake Oil Lever Sensor

ABS

Yellow

CAN

ABS

1)	ABS System

2)	CAN Failure

ESC

Yellow

CAN

TCS

1)	ABS System

2)	CAN Failure

ESC Off

Yellow

CAN

TCS

1)	ABS System

2)	CAN Failure

EPB

Yellow

CAN

EPB

1)	EPB System

2)	CAN Failure

Auto Hold

White
Yellow
Green

CAN

TCS

1)	TCS System

2)	CAN Failure

Seat Belt

Red

CAN

BCM
(Gateway)

BCM

2)	CAN Failure

Airbag

Red

CAN

SRSCM

1)	SRSCM System

2)	CAN Failure

EPS
(MDPS)

Red

CAN

MDPS

1)	MDPS Unit System

2)	MDPS Motor

3)	CAN Failure

TPMS

Yellow

CAN

TPMS

1)	TPMS System

2)	TPMS Sensor

3)	CAN Failure

Fuel Warning

Yellow

Direct
(Micom)

Fuel Sender

1)	Fuel Sendar Failure

2)	Wiring Failure

Door Open

Red

CAN

BCM
(Gateway)

BCM

2)	CAN Failure

3)	Door Sensor/switch

FCA

Yellow

CAN

AEB

1)	SCC System

2)	CAN failure

Diesel Particulate Filter (GPF)

Yellow

CAN

ECM

1)	GPF System

2)	CAN Failure

Over Speed Wanring

Yellow

CAN

ABS
TCS
(Speed)

1)	ABS System

2)	TCS System

3)	CAN Failure

Check point (Gauge)

No	Name	Signal Input	Signal Control (Unit/Sensor)	Check Point
1	Speedometer	C-CAN	ABS/ESC	1) CAN Line failure
3	Tachometer	C-CAN	EMS	1) CAN Line failure
4	Cooling water temperature	C-CAN	EMS	1) CAN Line failure
5	Fuel	Hardwire	Fuel Sander	1) Fuel sender failure
5	Fuel	Hardwire	Fuel Sander	2) Wiring failure
6	Shift lever indicator	C-CAN	TCU	1) CAN Line failure

Diagnosis with Diagnostic tool

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

The diagnostic system (Diagnostic tool) provides the following information.

(1)	Fault Code Searching : Checking failure and code number (DTC)

(2)	Data Analysis : Checking the system input/output data state

(3)	Actuation test : Checking the system operation condition

(4)	S/W Management : Controlling other features including system option setting and zero point adjustment

2.	If diagnose the vehicle by Diagnostic tool, select "DTC Analysis" and "Vehicle".

3.	If check current status, select the "Data Analysis" and "Car model".

4.	Select the 'CLU' to search the current state of the input/output data.

CLU Variant Coding

As we have more options (ESC, TPMS, SCC, etc.) in the car, the dashboard now have more information to display depending on the chosen options.

For this reason, we need to learn which options the current vehicle when we replace the dashboard.

To address this issue, a course of learning based on the option required for the vehicle when replacing the dashboard should be carried out.

This is called Variant Coding.

1.	Connect the cable of Diagnostic tool to the data link connector in driver side crash pad lower panel.

2.	Select the 'S/W Management' and 'Car model'.

3.	Select the 'Cluster Module' and 'CLU Variant Coding'.

Fuses And Relays

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Power Door Locks

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