Hyundai Santa Fe (TM): Body Electrical System / Fuses And Relays

Hyundai Santa Fe (TM) 2019-2023 Service and Repair Manual / Body Electrical System / Fuses And Relays

Components and components location

Component Location

1. Engine room relay box
 2. Sub relay box

3. ICU Junction block
 4. ICM relay box

Relay Box (Engine Compartment). Components and components location

Component Location
E/R Junction Block

Circuit (E/R Junction Block)

Circuit (E/R Junction Block)

PCB BLOCK

Circuit (PCB Block)

Relay Box (Engine Compartment). Repair procedures

Inspection
1.
Disconnect the negative (-) battery terminal.
2.
Pull out the relay from the engine compartment relay box.
Power Relay (Type A)
  
–
Do not use pliers.
–
Pliers will damage the relays, which could cause the engine to stall or not start.
–
Carefully remove the relay using the relay puller.
Check for continuity between the terminals.
1.
There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.
There should be no continuity between the No.30 and No.87 terminals when power is disconnected.
[Engine room relay box]

[Sub junction block]
Power Relay (Type B)
Check for continuity between the terminals.
A : Wiper relay (Low)
B : Wiper relay (High)
1.
There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.
There should be continuity between the No.30 and No.87 terminals when power is disconnected.
Power Relay (Type C)
Check for continuity between the terminals.
A : Cooling fan relay (High)
1.
There should be continuity between the No.30 and No.87 terminals when power and ground are connected to the No.85 and No.86 terminals.
2.
There should be no continuity between the No.30 and No.87 terminals when power is disconnected.
Replacement of PCB Block
1.
Disconnect the negative (-) battery terminal.
2.
Push 4 hooks in the engine room relay box out to the arrow direction and put up the PCB block (A).
3.
Disconnect the connector and remove the the PCB block (A).
Fuse
1.
Be sure there is no play in the fuse holders, and that the fuses are held securely.
2.
Are the fuse capacities for each circuit correct?
3.
Are there any blown fuses?
If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always determine why the fuse blew first and completely eliminate the problem before installing a new fuse.
Multi Fuse

  
–
Multi fuse (A) is needed to replace in the mass when it damaged only one fuse.
–
When replace the multi fuse, refer to the "Engine compartment - component location" diagram exactly.
–
Use the multi fuse capacities for each circuit correctly.

Relay Box (Passenger Compartment). Description and operation

Dscription and Operation
ICU (Integrated Central Control Unit)
ICU (Integrated Central Control Unit) is an integrated model of smart junction block and central gateway.
It performs the function of conventional "Smart junction block" and the function of communication medium of "Central Gateway".

Battery Monitoring System
When the risk of battery discharge is detected due to excessive current consumption from using electrical device such as black box while the engine is OFF.
The system warns the customer of battery discharge through the warning message on the cluster.
The battery sensor detects the excessive current consumption of the battery and the Integrated Central control Unit (ICU) records the battery discharge history.
When the battery discharge is detected, the message warning the customer is displayed on the cluster and the battery is charged using the alternator when the engine is driven.
The recorded history can be checked via optional diagnostic tool function: "Check the battery discharge warning history".

Checking the battery discharge warning history
–
This function allows checking the history of excessive battery consumption of the parked vehicle.
–
It is possible to check the running distance and SOC when the battery consumption was excessive and the current SOC information.
Using diagnostic tool, the "Check the battery discharge warning history" function of ICU is implemented.
1.
Procedure for coding variants
(1)
You should read the specification information for the front view camera that is installed in the vehicle before replacing it with a new front view camera.
(2)
Connect the cable of diagnostic tool to the data link connector in driver side crash pad lower panel, and turn on the diagnostic tool.
(3)
Select the 'S/W Management' and 'Car model'.
(4)
Select the "Integrated Central Control Unit" and "Battery Discharge Warning History Check".

Relay Box (Passenger Compartment). Components and components location

Components
ICU (Integrated Center Control Unit) Junction Block

Circuit (ICU Junction Block)

Relay Box (Passenger Compartment). Repair procedures

Fuse Inspection
1.
Check that the fuse holders are loosely held and that the fuses are securely fixed by the holders.
2.
Check that each fuse circuit has the exact fuse capacity.
3.
Check the fuses for any damage.
  
•
If a fuse is to be replaced, be sure to use a new fuse of the same capacity. Always identify the cause of the blown fuse and completely eliminate the problem before installing a new fuse.
Diagnosis with Diagnostic Tool
1.
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)
The diagnostic system(diagnostic tool) provides the following information.
(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 'ICU' to search the current state of the input/output data.
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Disconnect the connectors (A) from the fuse side of the ICU.
4.
Remove the ICU (A) after loosening the mounting nuts.
5.
Disconnect the connectors from the back side of the ICU.
Installation
1.
Install the ICU.
2.
Install the crash pad lower panel.
3.
Connect the negative (-) battery terminal.
4.
Check that all system operates normally.

ICM (Integrated Circuit Module) Relay Box. Description and operation

Description
The ICM relay is united with (rear wiper relay, seat heater relay(front/rear), head lamp washer relay and rear A/C relay) which installed inside the lower crash pad.

ICM (Integrated Circuit Module) Relay Box. Repair procedures

Inspection
Power Child Lock
Check for continuity between the terminals.
1.
There should be continuity between the No.15 and No.7,8 terminals when power and ground are connected to the No.15 and No.14 in the ICM-A.
2.
There should be continuity between the No.10 and No.12,13 terminals when power and ground are connected to the No.15 and No.14 in the ICM-A.
Power Child Unlock
Check for continuity between the terminals.
1.
There should be continuity between the No.11 and No.12,13 terminals when power and ground are connected to the No.11 and No.1 in the ICM-A.
2.
There should be continuity between the No.10 and No.7,8 terminals when power and ground are connected to the No.11 and No.11 in the ICM-A.

    Components and components location Component Location 1. Fuel filler door release actuator Fuel Filler Door Release Actuator.

    Troubleshooting Troubleshooting Symptom Possible cause Remedy Speedometer does not operate Cluster fuse (10A) blown Check for short and replace fuse Speedometer faulty Check speedometer CAN line faulty Check the EMS Wiring or ground faulty Repair if necessary Tachometer does not operate Cluster fuse (10A) blown Check for short and replace fuse Tachometer faulty Check tachometer CAN line faulty Check the EMS Wiring or ground faulty Repair if necessary Fuel gauge does not operate Cluster fuse (10A) blown Check for short and replace fuse Fuel gauge faulty Check gauge Fuel sender faulty Check fuel sender Wiring or ground faulty Repair if necessary Low fuel warning lamp does not light up Cluster fuse (10A) blown Check for short and replace fuse Bulb burned out Replace bulb Fuel sender faulty Check fuel sender Wiring or ground faulty Repair if necessary Water temperature gauge does not operate Cluster fuse (10A) blown Check for short and replace fuse Water temperature gauge faulty Check gauge Water temperature sender faulty Check sender CAN line faulty Check the EMS Wiring or ground faulty Repair if necessary Oil pressure warning lamp does not light up Cluster fuse (10A) blown Check for short and replace fuse Bulb burned out Replace bulb Oil pressure switch faulty Check switch Wiring or ground faulty Repair if necessary Parking brake warning lamp does not light up Cluster fuse (10A) blown Check for short and replace fuse Bulb burned out Replace bulb Brake fluid level warning switch faulty Check switch Parking brake switch faulty Check switch Wiring or ground faulty Repair if necessary Open door warning lamp and tailgate warning lamp do not light up Memory fuse (15A) blown Check for short and replace fuse Bulb burned out Replace bulb Door switch faulty Check switch Wiring or ground faulty Repair if necessary Seat belt warning lamp does not light up Cluster fuse (10A) blown Check for short and replace fuse Bulb burned out Replace bulb Seat belt switch faulty Check switch Wiring or ground faulty Repair if necessary Speedometer and odometer does not operate CAN line faulty Check the ABS ECU Wheel speed sensor faulty Check the wheel speed sensor Instrument Cluster.

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