Pins

Within specification: Go to step 6.

TSB #: 23-HC-001H

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SUBJECT:

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

SUBJECT:

6.

Visually inspect the lower part (A) of the safety
plug to see if the fuse is genuine or nongenuine as shown at right.
•

Genuine part (“PEC” Branded): No need
to replace. Reinstall all parts in reverse
order of removal and proceed to step 8.

•

Non-genuine part: Replace the safety
plug, reinstall all parts in reverse order
of removal.

Genuine part

A

Non-genuine part

A

7.

STUI
Using STUI, photograph the installed
Safety Plug with the last 6 digits of the
VIN and the date of the repair on a
piece of paper.
Upload the photo to STUI and proceed
to step 15.

TSB #: 23-HC-001H

Page 5 of 10
SUBJECT:

SUBJECT:

8.

i

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

Information

B

The following steps (8 – 14) only apply
for PRA-related DTCs P1B76/P1B77.

B
B

Remove the rear seat.
Refer to the shop manual:
• Body (Interior and Exterior) > Seat &
Power Seat > Rear Seat > Repair
procedures

B

B

Remove the 7 screws (B) securing the rear
seat access cover.

B
B

9.

Remove the 5 fasteners (C) and remove the
carpet trim.
Refer to the shop manual:
• Body (Interior and Exterior) > Interior >
Trunk Trim > Repair procedures
Remove the 4 nuts (D) securing the air duct
and remove the air duct.

D
D

C

C
D
C

C

TSB #: 23-HC-001H

D

C

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SUBJECT:

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

SUBJECT:

10.

Remove the nuts and bolts (E) securing the
steel cover and remove the cover for the
power relay assembly (PRA).
E

E

E

11.

!

WARNING

The HEV battery may have a charge of
120~150v. Failure to wear insulating gloves
may result in accidental injury or death.
Put on leather gloves on top of the insulating
gloves. Wear safety glasses.

H
G

Remove the negative (–) cable (F) first and
wrap the cable end with insulating tape.
Next remove the positive (+) cable (G) and
wrap the end with insulating tape (H).

F

Tightening Torque:
lb-ft

7.3

lb-in

87

N.m

9.4

TSB #: 23-HC-001H

Page 7 of 10
SUBJECT:

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12.

i

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

Information

With the high voltage cables insulated,
you may perform the steps below without
PPE.
Remove the 10mm nut securing the inverter
cables to the power relay assembly (PRA) (I).
Remove the negative (–) inverter cable (J) first,
then the positive (+) cable (K).

K

J

Tightening Torque:

13.

lb-ft

7.3

lb-in

87

N.m

9.4

I

Remove the black connector here as well as
the mating connector anchored to the steel tab
to gain access to the nut securing the BMS
ECU.

TSB #: 23-HC-001H

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SUBJECT:

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

SUBJECT:

14.

Loosen the four nuts (L) and tilt the BMS ECU
to the left to provide clearance between it and
the power relay assembly (PRA).

BMS
ECU

L
M

Remove the three mounting nuts (M) and
remove the power relay assembly (PRA).
Install a new PRA following the reverse order
of removal.
Tightening Torque:

15.

lb-ft

7.3

lb-in

87

N.m

9.4

L

STUI
Using STUI, photograph the installed
PRA with the last 6 digits of the VIN
and the date of the repair on a piece of
paper.

Upload the photo to STUI.

16.

Reassemble all parts in the reverse order of disassembly.

17.

Attach a GDS and delete any DTC.

TSB #: 23-HC-001H

Page 9 of 10
SUBJECT:

SUBJECT:

HYBRID POWER RELAY DTC P1B25, P1B76, P1B77, P0A0D

18.

Clear the DTC in the BlueLink system according to instructions in TSB 19-BE-010 (or latest
version).

19.

Drive the vehicle for two key-on/key-off drive cycles.

20.

End of service procedure.

TSB #: 23-HC-001H

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