Rear blower
unit assembly
28. Unbolt the 3 bolts that retain the rear blower
unit assembly (Figure 45) and then move it to
gain access to the “Telematics Control Unit”
(TCU).

Bolts

NOTE: Do not disconnect harnesses to the
rear blower unit assembly.


Reassembly torque to:
7 N•m (0.7 kg-m, 62 in-lb.)

Figure 45
29. Disconnect the three harness connectors from the TCU (Figure 46).
30. Unclip the antenna support clip from the TCU bracket (Figure 46).
31. Unbolt the four bolts that attach the TCU to the vehicle floor (Figure 46)



One bolt hidden in Figure 46.
Reassembly torque to: 10.1 N•m (1.0 kg-m, 7 ft-lb.)

Step 29

TCU

Step 30

Step 29
Step 31
Figure 46

21/26

32. Transfer the brackets from the old TCU to the new one.
a. Remove the two bolts that attach the front and rear TCU brackets; four total (Figure 47).
b. Transfer the brackets to the new TCU and install bolts.
 Reassembly torque to: 5.5 N•m (o.56 kg-m, 49 in-lb.)
Bolts

Bolts

Front TCU bracket

Rear TCU bracket

Figure 47

22/26

Deactivate the Old TCU and then Activate the new TCU
IMPORTANT: Steps 1 and 2 below must be performed AFTER the original TCU is removed from the
vehicle and BEFORE the replacement TCU is installed.
1. Collect and have ready the following information:
 VIN.
 International Mobile Equipment Identity Number (IMEI) of the original TCU. This
number is located on the TCU.
 IMEI Number of the replacement TCU. This number is located on the TCU.
 Serial Number of the replacement TCU. This number is located on the TCU.

LABEL ON TCU

Figure 15
2. Call the INFINITI CONNECTION™ Call Center at 1-800-334-7858, press “1” and listen for additional
applicable INFINITI retailer prompts to replace a TCU. (Hours of operation are listed at the bottom of the
page.)
NOTE: The phone number shown above is for TCU activation and deactivation ONLY. The Support Center
agent is unable to assist with matters unrelated to TCU activation and deactivation.
During this call:
 You will be asked for your name, dealership name, and all of the information collected in step 1.
 The Support Center agent will deactivate the original TCU and activate the replacement TCU.
IMPORTANT: Step 2 MUST be performed to activate the replacement TCU. If it is not performed the TCU will
not be able to communicate with the Infiniti Connection Global Data Center.
Infiniti Connection Call Center – Hours of Operation (Central Time Zone)
Monday – Friday: 7AM – 10PM

Saturday: 8AM – 5PM

Special Holiday Hours:
Closed Thanksgiving, Christmas, and New Years Day
Christmas Eve: 7AM – 7PM
New Years Eve: 7AM – 7PM
23/26

Install Replacement TCU


Perform steps 1-32 of Remove the TCU from the Vehicle procedure on page 9, in reverse order, to
install.

Turn TCU ON


Perform steps 1-15 of Turn OFF the TCU procedure, starting on page 2, to turn the TCU ON and then
confirm the Current status field shows “On”.

Write VIN Data
1. Select WRITE VIN (SAVED DATA).
2. Select Start.

Step
1

Step
2

Figure 49

24/26

3. Select Start.

Step
3

Figure 50

4. Select End.

Step
4

Figure 51
IMPORTANT:
 Wait at least 2 minutes after the ignition is turned ON before checking for DTCs. If DTCs are checked
prior to this a U1000 may be stored.
 After writing VIN to new TCU, confirm SOS light on overhead console is illuminated solid.
25/26

PARTS INFORMATION
Description
Telematics Control Unit

PART NUMBER
283B0-3JA5A

Quantity
1

CLAIMS INFORMATION
Submit a Campaign (CM) line claim using the following claims coding:
CAMPAIGN (“CM”) ID
DESCRIPTION
Replace Telematics Control Unit
PC451
($299 Co-Pay)

OP CODE

FRT

PC4512

1.1 hrs.

PC452

Replace Telematics Control Unit
($149 Co-Pay)

PC4522

1.1 hrs.

PC454

Replace Telematics Control Unit
(Dealer Action Unit – No Co-Pay)

PC4542

1.1 hrs.

26/26

QX56 & QX80 Telematics Control Unit Replacement

IMPORTANT: Those steps in RED below, under Campaign Overview, MUST be performed in
the order listed for the new TCU to operate correctly.
Campaign Overview:

1. Turn OFF the original TCU using CONSULT-III plus (C-III plus) (Page 2).

2. Save the VIN DATA using C-III plus (Page 7).

3. Remove the original TCU from the vehicle (Page 8).

4. Deactivate (unregister) the original TCU by calling INFINITI CONNECTION™ Call Center (Page 10).

5. Activate (register) the replacement TCU by calling INFINITI CONNECTION™ Call Center (Page 10).

6. Install the replacement TCU in the vehicle (Page 11).

7. Turn ON the replacement TCU using C-III plus (Page 11).

8. Write the VIN DATA using C-III plus (Page 11).

1/13

SERVICE PROCEDURE

Turn OFF the TCU
1. Connect the C-III plus VI to the vehicle.
2. Set the parking brake.
3. Turn the Ignition ON, but do not start the vehicle.
4. Launch C-III plus on the CONSULT PC.
5. Select Diagnosis (One System).

Step
5

Figure 1

2/13

6. Select TELEMATICS on page 2 of the “All systems” list.

Step
6

Figure 2

7. Select Work support.

Step
7

Figure 3

3/13

8. Select TCU ACTIVATE SETTING.
9. Select Start.

Step
8

Step
9

Figure 4

10. Select Start.

Step
10

Figure 5

4/13

11. Select Off to turn OFF the TCU.
12. Select End.

Step
11

Step
12

Figure 6

13. Select Start.

Step
13

Figure 7

5/13

14. Select Start.

Step
14

Figure 8

15. Confirm “Off” is displayed in the Current status field.

Step
15

Figure 9

6/13

Save VIN Data
1. Select SAVE VIN DATA.
2. Select Start.

Step
1

Step
2

Figure 10
3. Select Start.

Step
3

Figure 11

7/13

4. Select End.

Step
4

Figure 12

Remove the TCU from the Vehicle.
1. Remove instrument lower cover.
a. Pull disengaged pawls downward.
b. Pull back instrument lower cover.
c. Disconnect harness connectors.

Figure 13

8/13

2. Remove glove box assembly.
a. Remove glove box assembly fixing screws (A).
b. Open glove box lid.
c. Remove glove box assembly fixing screws (B).
d. Pull back glove box assembly.
e. Disconnect harness connector.

Figure 14
3. Remove the vehicle mounting bolts and
disconnect the connector, and then remove
them together with the bracket.
4. Remove the bracket mounting screw and
remove the bracket from TCU.

Figure 15

9/13

Deactivate the Old TCU and then Activate the new TCU
IMPORTANT: Steps 1 and 2 below must be performed AFTER the original TCU is removed from the
vehicle and BEFORE the replacement TCU is installed.
1. Collect and have ready the following information:
 VIN.
 International Mobile Equipment Identity Number (IMEI) of the original TCU. This
number is located on the TCU.
 IMEI Number of the replacement TCU. This number is located on the TCU.
 Serial Number of the replacement TCU. This number is located on the TCU.

LABEL ON TCU

Figure 16
2. Call the INFINITI CONNECTION™ Call Center at 1-800-334-7858, press “1” and listen for additional
applicable INFINITI retailer prompts to replace a TCU. (Hours of operation are listed at the bottom of the
page.)
NOTE: The phone number shown above is for TCU activation and deactivation ONLY. The Support Center
agent is unable to assist with matters unrelated to TCU activation and deactivation.
During this call:
 You will be asked for your name, dealership name, and all of the information collected in step 1.
 The Support Center agent will deactivate the original TCU and activate the replacement TCU.
IMPORTANT: Step 2 MUST be performed to activate the replacement TCU. If it is not performed the TCU will
not be able to communicate with the Infiniti Connection Global Data Center.
Infiniti Connection Call Center – Hours of Operation (Central Time Zone)
Monday – Friday: 7AM – 10PM

Saturday: 8AM – 5PM

Special Holiday Hours:
Closed Thanksgiving, Christmas, and New Years Day
Christmas Eve: 7AM – 7PM
New Years Eve: 7AM – 7PM
10/13

Install Replacement TCU


Perform steps 1-4 of Remove the TCU from the Vehicle procedure starting on page 8, in reverse
order, to install.

Turn TCU ON


Perform steps 1-15 of Turn OFF the TCU procedure, starting on page 2, to turn the TCU ON and then
confirm the Current status field shows “On”.

Write VIN Data
1. Select WRITE VIN (SAVED DATA).
2. Select Start.

Step
1

Step
2

Figure 17

11/13

3. Select Start.

Step
3

Figure 18

4. Select End.

Step
4

Figure 19
IMPORTANT:
 Wait at least 2 minutes after the ignition is turned ON before checking for DTCs. If DTCs are checked
prior to this a U1000 may be stored.
 After writing VIN to new TCU, confirm SOS light on overhead console is illuminated solid.
12/13

PARTS INFORMATION
Description
Telematics Control Unit

PART NUMBER
283B0-3JA5A

Quantity
1

CLAIMS INFORMATION
Submit a Campaign (CM) line claim using the following claims coding:
CAMPAIGN (“CM”) ID
DESCRIPTION
Replace Telematics Control Unit
PC451
($299 Co-Pay)

OP CODE

FRT

PC4513

1.1 hrs.

PC452

Replace Telematics Control Unit
($149 Co-Pay)

PC4523

1.1 hrs.

PC454

Replace Telematics Control Unit
(Dealer Action Unit – No Co-Pay)

PC4543

1.1 hrs.

13/13

Q50 Telematics Control Unit Replacement
IMPORTANT: Those steps in RED below, under Campaign Overview, MUST be performed in the
order listed for the new TCU to operate correctly.
Campaign Overview:
1.

Turn OFF the original TCU using CONSULT-III plus (C-III plus) (page 2).

2.