Hyundai Ioniq: High Voltage Battery System / Inspection

Hyundai Ioniq (AE) 2017-2024 Service Manual / Hybrid Control System / High Voltage Battery System / Inspection

Inspection
[Battery Pack Assembly Troubleshooting Chart]

   
For SOC check, refer to "SOC Inspection"
For voltage check, refer to "Battery Voltage Inspection"
For battery voltage sensing circuit, refer to "Voltage Sensing Circuit Inspection"
For isolation resistance check, refer to "Isolation Resistance Inspection"
[SOC Level and Follow-up]
SOC
Symptom
Warning Lamp
Follow-up
MIL
Service
Fuel

Normal
-
-
-
 
10 - 15%
Motor torque limite
(Acceleration delay)
-
-
ON
Refuel and check the SOC again
ON
-
-
Repair the MIL or Service Lamp related system
Charge the battery by starting the engine
Refuel if necessary
ON
ON
-
-
ON
-
On
ON
ON
5 - 10%
EV Mode inhibited
FATC Inhibited
LDC Inhibited
-
-
ON
Refuel and check the SOC again
ON
-
-
Repair the MIL or Service Lamp related system
Charge the battery by starting the engine
Refuel if necessary
ON
ON
-
-
ON
-
ON
ON
ON
0 - 5%
Impossible to start
ON
-
-
Repair the MIL or Service Lamp related system
Start the engine with GDS to charge the battery
Refuel if necessary
ON
ON
-
-
ON
-
ON
ON
ON
0%
ON
-
-
Repair the MIL or Service Lamp related system
If necessary, Replace Battery Pack
Refuel if necessary

[SOC Inspection]
1.
Connect the GDS to the Data Link Connector (DLC).
2.
Turn the ignition switch ON.
3.
Check the SOC in GDS service data.
SOC : 20% - 90%

[Battery Voltage Inspection]
1.
Connect the GDS to the Data Link Connector (DLC).
2.
Turn the ignition switch ON.
3.
Check the cell and pack voltage in GDS service data.
Cell Voltage : 2.5 - 4.3V
Pack Voltage : 180 - 300V

[Voltage Sensing Circuit Inspection]
1.
Shut off the high voltage circuit.
(Refer to "High Voltage Shutoff Precedure")
2.
Remove the battery temperature sensor.
(Refer to "Battery Temperature Sensor")
3.
Check the continuity of the wiring between the harness connectors of the module and BMS ECU.
Specification : below 1Ω

4.
Connect the harness connectors to the BMS ECU.
5.
For checking the short circuit to ground, measure resistance between the module harness connectors and chassis ground.
Specification : 1 MΩ or higher

[Isolation Resistance Inspection]
1.
Connect the GDS to the Data Link Connector (DLC).
2.
Turn the ignition switch ON.
3.
Check the isolation resistance in GDS service data.
Isolation Resistance : Around 1.0 MΩ

    Specifications

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    Battery Pack Assembly. Repair procedures

    Removal    • Be sure to read and follow the "General Safety Information and Caution" before doing any work related with the high voltage system...

    Other information:

    Hyundai Ioniq (AE) 2017-2024 Service Manual: Components and components location


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    Hyundai Ioniq (AE) 2017-2024 Service Manual: Specifications


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