ITB10-074B

Classification:
Reference:
BR10-012B
Date:
ITB10-074B
March 8, 2023
ABS/VDC CAN DIAGNOSIS INFORMATION
This bulletin has been amended. See AMENDMENT HISTORY on the last page.
Please discard previous versions of this bulletin.
APPLIED VEHICLES:
All 2005-2023 Infiniti vehicles with ABS and/or VDC except 2022-2023 QX60 (L51)
SERVICE INFORMATION
When diagnosing a vehicle with an ABS or VDC SLIP warning light ON and with DTCs stored in the ABS/VDC
actuator control unit, perform DTC diagnosis first.

Do not replace the ABS/VDC actuator control unit without being supported by the DTC diagnosis.

Do not erase DTCs before performing DTC diagnosis.

Always fully diagnose before performing any repairs.
When DTC U1000 (CAN COMM CIRCUIT) is the only DTC stored in the ABS/VDC actuator control unit, use
the REPAIR FLOW CHART starting on page 2. This will assist in proper diagnosis results and repairs in
addition to using diagnostic information in the Electronic Service Manual (ESM).

If DTC U1000 is found stored in other systems, refer to ITB10-029 and the applicable ESM.

If other DTCs are found stored in ABS/VDC along with U1000, follow the diagnosis steps for those
DTCs in the applicable ESM.
CLAIMS INFORMATION
Refer to the current Infiniti Warranty Flat Rate Manual and use the appropriate claims coding for repairs
performed.
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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REPAIR FLOW CHART
ABS/VDC SLIP warning light on with DTC
U1000 found stored in ABS/VDC.
Check for DTCs in all systems that
communicate with ABS/VDC through CAN.
Yes
Record ALL systems’ self
diagnosis results and CAN
diagnosis results. Do NOT
erase unless it is necessary.
DTC U1010 or any ECU failure
related DTC found stored in any
system?
Follow ESM diagnosis for
all other ABS/VDC stored
DTCs. Perform DTC
Confirmation test.
No
No
Is DTC U1000 the ONLY
DTC stored in ABS/VDC?
Yes
Diagnose the root cause.
Repair/replace as necessary.
Perform DTC Confirmation
test.
See ‘A’ on page 3.
See ‘B’ on page 3.
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ITB10-074B
A
Is DTC U1000 in ABS/VDC
detected again?
B
Determine the vehicle’s CAN
system type, and perform CAN
diagnosis per the appropriate
ESM. Repair/replace as
necessary.
Yes
No
Perform CAN system
diagnosis. From diagnosis
results, repair/replace as
necessary.
Perform DTC Confirmation
for U1000 in ABS/VDC. Is
U1000 detected again?
No
Yes
Diagnosis and repairs
completed.
Replace the ABS/VDC
actuator control unit.
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ITB10-074B
AMENDMENT HISTORY
PUBLISHED DATE
REFERENCE
December 15, 2010
ITB10-074
Original bulletin published
January 27, 2022
ITB10-074A
APPLIED VEHICLES revised and TSB reference on page 1
corrected
March 8, 2023
ITB10-074B
APPLIED VEHICLES revised
DESCRIPTION
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ITB10-074B