SB-10044444-1014

Classificatio n:

Ref eren ce:

Dat e:

EL12-036

ITB12-038

June 29, 2012

2011 - 2012 M; 4WAS LIGHT “ON” WITH DTC C1631,
C1930 AND C1138
APPLIED VEHICLES

2011-2012 M37/M56 (Y51)

IF YOU CONFIRM:
The 4 Wheel Active Steer (4WAS) warning light is “ON” with ALL of the following DTCs stored:
•

C1631, C1930 and C1138
o C1A04, related to the ABS actuator, may also be stored. If C1A04 is stored perform ACTION first,
then re-check for DTCs.

ACTION:
IMPORTANT: If any other DTCs are present, other than those listed in IF YOU CONFIRM, this bulletin
does not apply. Refer to Electronic Service Manual (ESM) for the appropriate diagnostic procedures.
1. Refer to the ESM and perform the appropriate diagnostic procedures for each DTC stored.
¾ Repair each system as necessary and retest for DTC’s.
2. If DTC’s reset after “repair and confirmation” replace the 4WAS Control Unit with part number listed in
PARTS INFORMATION below.
¾ Refer to the ESM for procedure to replace 4WAS Control Unit.
3. Clear all DTCs stored and confirm that none reoccur.
NOTE: Any DTCs present after ACTION is performed are not covered by this bulletin. Refer to ESM for
the appropriate diagnostic procedure.
PARTS INFORMATION
DESCRIPTION
4WAS Control Unit

PART #
285H0-1MT1B

QUANTITY
1

CLAIMS INFORMATION
Submit a Primary Part (PP) type line claim using the following claims coding:
DESCRIPTION
OP CODE
PFP
SYM
DIAG
FRT
RPL VARIABLE RATIO STEERING CONTROL
QF52AA
(1)
HC
32
(2)
1. Reference the Parts Information Table and use the applicable Seat Slide Assembly Part Number as the
Primary Part.
2. Reference the current Infiniti Warranty Flat Rate Manual and use the indicated flat rate time.
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 dealer to determine if this
applies to your vehicle.

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