battery INFINITI Q50 HYBRID 2018 Dismantling Guide

• The colors of the high-voltage harnesses and connectors are all orange. Orange
high-
voltage labels
are applied to the high-voltage battery and other high-voltage devices.
Do not touch the high-voltage battery or other high-voltage devices without always
wearing appropriate PPE.
• Clearly identify the persons responsible for high-voltage work and ensure that other
persons
do not touch the vehicle. When not working, cover high-voltage parts with an
insulating cover sheet and sign or similar item to prevent other persons from contacting
them.
• Be sure to put the removed service plug in your pocket and carry it with you so
another
person does not accidentally reinstall it while work is in progress.
• The high-voltage battery retains high-voltage at all times. Appropriate Personal
Protective
Equipment (PPE) must always be worn when touching or working on
high-voltage components to avoid risk of electrical shock and severe personal injury or
death.
• Immediately insulate disconnected high-voltage connectors and terminals with
insulated
tape.
• The vehicle contains parts that contain powerful magnets. If a person who is wearing
a

pacemaker or other medical device is close to these parts, the medical device may be
affected by the magnets. Such persons must not perform work on the vehicle.
• Because this vehicle uses components that contain high-voltage and powerful
magnetism,
do not carry any metal products which may cause short circuits, or any
magnetic media (cash cards, credit cards, etc.) which may be damaged when working on
the vehicle.
• Keep removed high-voltage battery packs away from rain to avoid electric shock.
•

Do not heat removed battery packs higher than 158° F (70° C) . There is the possibility of a hybrid system malfunction occurring if the vehicle
is

changed to READY status while the service plug is removed.
DG–43

6-2 High-voltage Battery Pack Removal
6-2.1
Exploded View
high-voltage Battery Exploded View : Vehicle front
1.

High-voltage battery assembly 2. Bracket (RH) 3. Bracket (LH)
A. View A B. View B A
B B1A
3 2
AAYIA0228ZZ
DG–44

High-voltage Battery Cooling System Exploded View
, ,
: Indicates that the part is connected at points with same symbol in actual vehicle
1.
Battery outlet duct C 2. Battery outlet duct B 3. Battery cooling fan
4. Battery outlet duct A 5. Battery inlet duct B6. Battery inlet duct A
7. Battery front duct 8. DC/DC inlet duct9. DC/DC outlet duct3
4 2
1
9
85
6
7
AAYIA0227ZZ
DG–46

6-2.2 Removal Procedure
1. Discharge high-voltage battery. Refer to 3-3 Discharge Procedures (DG–19)
2. Remove the service plug. Refer to Alternate Procedure 2 (Remove Service Plug) (DG–28).
3.

Lift up seat cushion while pulling the seat cushion hook
levers, and then disengage seat cushion hook.
4. Remove seat cushion from vehicle.
5. Remove seat belt from seat belt hook.
6. Remove seatback fixing nuts (A) .
7. Lift up seatback, disengage seatback frame (B) from engaging portion (C) , and then remove seatback.
8. Remove battery inlet duct A and battery front duct. Refer to the high-voltage Battery Cooling System Exploded View in 6-2.1 Exploded View (DG–44). AAYIA0257ZZ
A
AAYIA0258ZZ
A
A
A
A
B
C
AAYIA0259ZZ
DG–47

9. Remove the rear seat back finisher (1) , and rear seat
back plate (2) .
10. Remove the trunk room finisher, trunk side finisher LH, and trunk side finisher RH. Refer to the Trunk Room Trim Exploded View in 6-2.1 Exploded View (DG–44).
11.

Remove fuse and fusible link box from high-voltage battery according to the following steps. a. Remove the fuse and fusible link box cover to remove harness mounting nuts (A) and (B) .
b. Remove the relay (1) from fuse and fusible link box.
c. Remove the fuse and fusible link box from high- voltage battery, and move to side.
12. Remove the cover of 12-volt battery positive terminal.
13. Remove the DC/DC harness (1) from 12-volt battery.
14. Disconnect sub oil pump inverter harness connectors (A)
15. Disconnect positive terminal from 12-volt battery, and disconnect fusible link harness connector (12-volt
battery side) (A) . 12
AAYIA0224ZZ 1
B A
AAYIA0225ZZ 1
A
AAYIA0226ZZ A
AAYIA0234ZZ
DG–48

16. Remove the ground cable (1) .
DANGER
Touching high-voltage components without wearing
appropriate
Personal Protective Equipment (PPE) will
cause electrocution.
17. Remove the hybrid control unit (1) and Vehicle Sound for Pedestrians (VSP) control assembly (2) from high-
voltage battery. DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
18. Remove the terminal covers (1) and (2) . DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
19. Remove the terminal cover (1) . DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution. 1
AAYIA0235ZZ 1
2
AAYIA0236ZZ 1 2
AAYIA0237ZZ 1
AAYIA0238ZZ
DG–49

23. Disconnect DC/DC harness clamps (A) .
24.
Disconnect battery controller harness connector (A) to
remove clamps (B) , (C) , and (D) from bracket (LH) . DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
25. Remove battery outlet duct (1) . : Vehicle front
DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
26. Remove the bracket (LH) from high-voltage battery.
27. Remove the DC/DC outlet duct (1) and DC/DC inlet duct (2) . : Vehicle front
DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution. A
AAYIA0242ZZ B
C
D
A
AAYIA0248ZZ 1
AAYIA0243ZZ 12
AAYIA0244ZZ
DG–51

28. Remove battery outlet duct (1) .
29.
Remove the battery inlet duct B (1) and battery inlet
duct A (2) . : Vehicle front
DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
30. Remove the gas discharge tube (1) from high-voltage battery.
31. Remove the mounting bolts (A) of high-voltage battery. : Vehicle front
DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution. 1
AAYIA0222ZZ 2 1
AAYIA0245ZZ 1
-AAYIA0246ZZ A
-AAYIA0247ZZ
DG–52

32. Remove the mounting bolts (A) of bracket (RH) on
vehicle side. DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
33. Place a piece of plywood (A) in the trunk room as shown in the figure. Lift the battery pack in the direction (1) shown by arrow and slide (2) the cardboard (B) to location (C) to position it under
the battery pack. DANGER
Touching high-voltage components without wearing appropriate Personal Protective
Equipment

(PPE) will cause electrocution.
34. Pull out battery pack (1) together with the cardboard (A) in the rear of vehicle. DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution. Battery pack is in unstable condition. Never allow it to
fall.
A
AAYIA0249ZZ AB
C B
A
211
2
AAYIA0250ZZ A1
AAYIA0251ZZ
DG–53

35. Follow the procedure below to remove the battery pack
from inside the trunk room.
a. Attach carabiners (A) of sufficient capacity to hold battery weight, in the positions as shown in the
figure, then connect a belt slinger (B) to it. DANGER
Touching high-voltage components without wearing appropriate Personal Protective
Equipment

(PPE) will cause electrocution.
b. Slightly lift battery pack by using an engine crane (A) . DANGER
Touching high-voltage components without wearing
appropriate

Personal Protective Equipment (PPE) will
cause electrocution.
c. Remove the bracket RH (1) . A B
B
A
AAYIA0252ZZ
A
AAYIA0254ZZ 1
AAYIA0253ZZ
DG–54