Classification:

Reference:

Date:

ST18-005

ITB18-043

December 12, 2018

2019 QX50; DIRECT ADAPTIVE STEERING PULL
AND STEERING WHEEL OFF-CENTER AT ENGINE START
APPLIED VEHICLES:
APPLIED SYSTEM:

2019 QX50 (J55)
Direct Adaptive Steering (DAST)

IF YOU CONFIRM
While driving in a straight line on a smooth and flat road:


The steering wheel is off-center,

And


The steering wheel returns to center and the vehicle begins to pull, when the driver’s grip on the
steering wheel is relaxed.

ACTION
1. Confirm that the steering wheel is indexed correctly.
2. Confirm that the steering shaft is indexed correctly.
3. Perform Direct Adaptive Steering (DAST) Calibration.

IMPORTANT: The purpose of ACTION (above) is to give you a quick idea of the work you will be performing.
You MUST closely follow the entire SERVICE PROCEDURE as it contains information that is essential to
successfully completing this repair.
Infiniti Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are properly trained
individuals who have the equipment, tools, safety instruction, and know-how to do a job properly and safely. NOTE: If you believe that
a described condition may apply to a particular vehicle, DO NOT assume that it does. See your Infiniti retailer to determine if this
applies to your vehicle.
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SERVICE PROCEDURE

1. Record (write down) any customer settings that will be lost when the battery is disconnected.


For a listing of the systems that may lose settings or memory when disconnecting the 12V battery, refer
to the Electronic Service Manual (ESM) Section ELECTRICAL POWER CONTROL > POWER
SUPPLY, GROUND CIRCUIT ELEMENTS > BASIC INSPECTION > INSPECTION AND
ADJUSTMENT > ADDITIONAL SERVICE WHEN REMOVING BATTERY NEGATIVE TERMINAL.
 This list often includes items such as HVAC, power windows, clock, etc.

2. Turn the ignition OFF.

3. Disconnect the negative terminal of the vehicle 12V battery.


For the procedure to disconnect the battery, refer to the ESM section ELECTRICAL POWER
CONTROL > POWER SUPPLY, GROUND CIRCUIT ELEMENTS > REMOVAL AND INSTALLATION
> BATTERY > Removal and Installation.

4. Wait at least 3 minutes.

Confirm that the Steering Wheel is Indexed Correctly
IMPORTANT: Follow all cautions, warnings, and notes in the ESM when working on or near a Supplemental
Restraint System (SRS), such as an air bag.
CAUTION: Handle interior trim carefully to avoid damage. Work with clean hands and clean tools to avoid dirt
and stains. Use protective covers as needed.
5. Remove the driver air bag module (module) from the vehicle.


For module removal, refer to the ESM section RESTRAINTS > SRS AIRBAG > REMOVAL AND
INSTALLATION > DRIVER AIR BAG MODULE.

6. Set the module in a clean working area.

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7. Verify that the alignment index mark on the steering shaft is in line with the index mark on the steering
wheel, as shown in Figure 2.


If the two (2) index marks are not in line, remove the steering wheel and realign as shown in Figure 2.
 For steering wheel removal, refer to the ESM section STEERING > STEERING SYSTEM >
ELECTRIC POWER STEERING > REMOVAL AND INSTALLATION > STEERING WHEEL.

Figure 1

Incorrect alignment

Correct alignment

Index marks

Figure 2

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8. Reinstall the driver air bag module into the vehicle in reverse order of removal.

9. Connect both battery cables – positive cable first.

10. Reset/reinitialize systems as needed.


For a listing of the systems that may lose settings or memory when disconnecting the 12V battery, refer
to the ESM Section ELECTRICAL POWER CONTROL > POWER SUPPLY, GROUND CIRCUIT
ELEMENTS > BASIC INSPECTION > INSPECTION AND ADJUSTMENT > ADDITIONAL SERVICE
WHEN REMOVING BATTERY NEGATIVE TERMINAL.
 This list often includes items such as, HVAC, power windows, clock, etc.

11. Turn the ignition ON and observe the air bag warning light.
 The light should illuminate for 7 seconds and then go out.
NOTE: If the air bag warning light does not operate as described above there may be an issue not
covered by this bulletin. Refer to ASIST and the appropriate ESM for additional diagnostic and repair
information.

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Confirm that the Steering Shaft is Indexed Correctly

12. Remove the lower joint cover on the drivers floor.


Unscrew the two (2) plastic clips.
Plastic clips

Figure 3

Lower joint

Figure 4

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13. Verify that the lower joint is correctly aligned as shown in Figure 5.


The plastic guide should be parallel with the sides of the metal clamp of the lower joint.



If the plastic guide is not parallel with the sides of the metal clamp of the lower joint, disconnect the
metal clamp from the steering gear and realign as shown in Figure 5.
 For lower joint removal, refer to the ESM section STEERING > STEERING SYSTEM > DIRECT
ADAPTIVE STEERING > REMOVAL AND INSTALLATION > LOWER JOINT.

Correct alignment

Incorrect alignment

Lower joint
metal clamp

Plastic guide
Figure 5

14. Reinstall the lower joint cover to the drivers floor.


Attach with two (2) plastic clips.

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Direct Adaptive Steering (DAST) Calibration
IMPORTANT:
When performing Direct Adaptive Steering (DAST) Calibration (Mode 1):


Always use an alignment rack with the front wheels positioned on the turn tables and the pins
removed. The front wheels must be allowed to move freely.



DO NOT perform DAST Calibration (MODE 1) with the front wheels in any other position than listed
above.

After performing DAST Calibration (MODE 1), if there is a steering wheel off-center or a vehicle pull condition,
perform DAST Calibration (MODE 1) again, making sure to use an alignment rack.

NOTE: Do not perform a wheel alignment for a steering wheel off-center or pull
condition.

The following service procedures include:


DAST CALIBRATION (MODE1)



ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION



Self-Diagnosis Check



Confirmation of EPS/DAST 3 ANGLE 1

DAST CALIBRATION (MODE1)
CAUTION:


Never move the vehicle during DAST CALIBRATION (MODE1) because the steering gear is held
in a neutral position until the ignition switch is turned OFF.



Never rotate the steering wheel more than 120 degrees just after DAST CALIBRATION (MODE1)
has been completed because the spiral cable will be damaged.

WARNING:


Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).

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Before starting Calibration Mode1:
15. Place the vehicle on an alignment rack and then remove the pins from the turn tables so they are allowed
to move freely.
16. Place the steering wheel tilt to the highest position.
17. Connect a battery charger to the vehicle battery and set it to a low charge rate.
NOTE: This calibration procedure will be performed twice completely through.
IMPORTANT: Do Not turn the ignition OFF at the end of the second time through.
18. Connect the plus VI to the vehicle.
NOTE: Make sure the AC adapter is connected to the CONSULT PC.
19. Turn the ignition ON (engine OFF).
IMPORTANT: Do Not start the engine.
20. Turn ON the CONSULT PC, and then open CONSULT-III plus (C-III plus).
IMPORTANT: Before starting, make sure:




ASIST on the CONSULT PC has been synchronized (updated) to the current date.
All C-III plus software updates (if any) have been installed.
The CONSULT PC is connected to the Internet (WiFi or cable).

21. On the C-III plus screen, select Diagnosis (All Systems). After system call has completed, select
EPS/DAST 3 > Work support > DAST CALIBRATION (MODE1). See Figure 6.

Figure 6
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22. Select START, and then START a second time to begin DAST CALIBRATION (MODE1).


Do not rotate the road wheels during the DAST calibration.

WARNING: Be careful of moving parts. The steering wheel and front wheels will move automatically by
themselves after starting DAST CALIBRATION (MODE1).

23. When Auto steering has completed, center the steering wheel to the neutral (straight ahead) position, and
then select Start again (see Figure 7).
IMPORTANT: The steering wheel must be positioned in the neutral (straight ahead) position, for step 23
above, to ensure that the steering wheel will be centered when driving straight.
CAUTION: When DAST CALIBRATION (MODE1) has completed, the steering wheel is disconnected from
the steering gear and the force feedback of the steering is reduced. Never turn the steering wheel
beyond 120 degrees otherwise the spiral cable will be damaged.

Figure 7

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24. Select End.

Figure 8

25. Turn the ignition switch OFF.
2nd DAST CALIBRATION (MODE1)
26. With the C-III plus still connected, turn the ignition ON (engine OFF) and repeat steps 21-24 a second time,
but Do Not turn the ignition OFF after step 24, and then proceed to step 27.

27. Select the BACK button twice, and then select Yes to “Delete results”.


After system call completes, proceed to ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL
POSITION on the next page.

IMPORTANT: Do Not turn the ignition OFF.


If the ignition is turned OFF between the DAST CALIBRATION (MODE1) and ADJUSTMENT OF
STEERING ANGLE SENSOR NEUTRAL POSITION, the procedure for DAST CALIBRATION
(MODE1) must be repeated (steps 19-26).

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ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

28. With C-III plus in Diagnosis (All Systems), select ABS > Work support > ST ANGLE SENSOR
ADJUSTMENT, and then select START.

29. When the message “Waiting for your operation…” is displayed, select Start.
IMPORTANT: Do Not touch the steering wheel while adjusting steering angle sensor.

Figure 9
30. When the message COMPLETE is shown (after approximately 5 seconds), select End.

31. Turn the ignition switch OFF and wait at least 10 seconds.

32. Disconnect the battery charger from the vehicle 12V battery.

33. Go to Self-Diagnosis Check on the next page.

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SELF-DIAGNOSIS Check

34. Start the engine (turn ignition ON with brake pressed).
IMPORTANT: Do Not drive the vehicle while performing the SELF-DIAGNOSIS Check.
35. Check for DTCs in DAST 1, DAST 2, and EPS/DAST 3 as follows:
A. In C-III plus, return to the Home screen.
B. Select Diagnosis (All Systems), and then select Confirm.
C. Wait for system call to complete.
D. Check for stored DTCs.


If no DTCs are stored, go to CONFIRMATION of EPS/DAST 3 ANGLE 1 on the next page.



If DTCs are stored, refer to the ESM for diagnosis and repair.

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CONFIRMATION of EPS/DAST 3 ANGLE 1

NOTE: At this point the ignition should still be ON with the engine running or the READY light ON.
36. With C-III plus in Diagnosis (All Systems), select EPS/DAST 3 > DATA MONITOR > ANGLE 1, and then
check the value of ANGLE 1 (see Figure 10).


ANGLE 1 should be within the standard value shown below.



If ANGLE 1 is not within the standard value:
a. Change the steering wheel tilt to a slightly lower position.
b. Perform DAST CALIBRATION (MODE1) again.
c. Perform CONFIRMATION of EPS/DAST 3 ANGLE 1 again.
d. Repeat a – c above until ANGLE 1 is within the standard value.
Monitor item
ANGLE 1

Standard value
between -4.4 and 4.4

Figure 10
37. Disconnect C-III plus from the vehicle.
38. Procedure is complete.

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PARTS INFORMATION
DESCRIPTION

PART NUMBER

QUANTITY

Nut (Steering Wheel Lock Nut)

01223-00241

1

CLAIMS INFORMATION
Submit a Primary Operation (PO) type line claim using the following claims coding:
DESCRIPTION

OP CODE

SYM

DIA

FRT

Adjust Steering Wheel Off Center

WD34AA

CA

32

(1)

(1) Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat Rate Time (FRT).
On a separate line
DESCRIPTION
Adjust Steering Angle

OP CODE
WD36AA

SYM
CA

DIA
32

FRT
(1)

(1) Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat Rate Time (FRT).
On a separate line
DESCRIPTION

OP CODE

SYM

DIA

FRT

Calibrate Direct Adaptive Steering

WD74AA

CA

32

(1)

(1) Reference the current Infiniti Warranty Flat Rate Manual and use the indicated Flat Rate Time (FRT).

AMENDMENT HISTORY
PUBLISHED DATE
December 12, 2018

REFERENCE
ITB18-043

DESCRIPTION
Original bulletin published

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