DTC No. P1C65-62 Main battery voltage sensing failure

DTC No. P1C65-62: Main battery voltage sensing failure

danger

When servicing the high voltage system parts, always shut off the high voltage by removing the service plug (Refer to PRECAUTIONS ON HOW TO USE THE HIGH-VOLTAGE VEHICLE) .
When servicing the high voltage system parts, always wear the protective equipment or armour to measure the high-voltage (Refer to PRECAUTIONS ON HOW TO USE THE HIGH-VOLTAGE VEHICLE).

TROUBLE JUDGMENT

Check Condition

During quick charging (external power supply)

Judgment Criterion

The difference between the voltage value received from the quick charger/external power supply facility and the battery voltage value received from the BMU is detected for 9 seconds or more.

TROUBLESHOOTING HINTS

Malfunction of the quick charging contactor
Malfunction of the junction box
Malfunction of the high-voltage fuse (225 A) for quick charging
Malfunction of the high-voltage cable
Malfunction of the EV home & quick charger cable
Malfunction of the On Board Charger (OBC)/DC-DC converter

note	The DTC No. P1C65-62 may be set due to the following external factor. • Malfunction of the quick charger or external power supply facility

DIAGNOSIS

Required Special Tools:

MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
MB992745: V.C.I.-Lite main harness A
MB992747: V.C.I.-Lite USB cable short
MB992748: V.C.I.-Lite USB cable long
MB991223: Wiring harness set
MB992006: Extra fine probe

1.M.U.T.-IIISE other DTC check

Check whether the following DTCs is set.

DTC No. P1C66-07 QC Contactor driver failure

Is the DTC set?

Troubleshoot the set DTCs (Refer to DTC No. P1C66-07 QC Contactor driver failure

) .

2.Check of the high-voltage fuse (225 A) for quick charging

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Check the continuity of the high-voltage fuse (225 A) for quick charging in junction box (Refer to CHECK AND REPLACEMENT OF HIGH-VOLTAGE FUSE INSIDE THE JUNCTION BOX

Is the check result normal?

Replace the high-voltage fuse for quick charging (Refer to CHECK AND REPLACEMENT OF HIGH-VOLTAGE FUSE INSIDE THE JUNCTION BOX

3.Check the installation of the EV home & quick charger cable.

Check that the terminals of the EV home & quick charger cable is installed to the junction box with specified torque.

Is the check result normal?

Repair the installation.

4.Visually check of the inside of the junction box

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Visually check that there is no burnout, damage, foreign material inside the junction box.

Is the check result normal?

Replace the junction box (Refer to JUNCTION BOX REMOVAL AND INSTALLATION

5.Check of the quick charging contactor

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Check the quick charging contactor (Refer to QUICK CHARGING CONTACTOR CHECK

Is the check result normal?

Replace the quick charging contactor.

6.Visually check of the EV home & quick charger cable

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Visually check that there is no burnout, damage, foreign material on the EV home & quick charger cable between junction box and quick charge port.

Is the check result normal?

Replace the EV home & quick charger cable (Refer to EV HOME & QUICK CHARGER CABLE REMOVAL AND INSTALLATION

7.Check of the drive battery rear cable (junction box)

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Check whether the terminals of the drive battery rear cable (junction box) is connected properly.

Is the check result normal?

Repair the installation.

8.Visually check of the drive battery rear cable (junction box)

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Visually check that there is no burnout, damage, foreign material on the drive battery rear cable (junction box) between drive battery and junction box.

Is the check result normal?

Replace the drive battery rear cable (junction box) (Refer to DRIVE BATTERY CABLE REMOVAL AND INSTALLATION

9.Check the installation of the drive battery rear cable (junction box).

danger

Carry out the check on the high-voltage circuit while reading carefully the precautions on handling a high-voltage vehicle.
Wear the specified protection equipment during the check.

Check that the terminals of the drive battery rear cable (junction box) is installed to the junction box with specified torque.

Is the check result normal?

Repair the installation.

10.Check whether the DTC is set again.

(1) Erase the set DTC.

(2) Charge the drive battery by using the quick charger (external power supply equipment) other than the defective one.

(3) Check whether the DTC is set again.

Is the DTC set?

Replace the On Board Charger (OBC)/DC-DC converter (Refer to ON BOARD CHARGER (OBC) &DC-DC CONVERTER REMOVAL AND INSTALLATION

Ask the user to inspect the quick charger/external power supply equipment.