Service bulletin ITB12023B

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
Type	Service bulletin
NHTSA id	10192071
Published by NHTSA	2021-05-10
Manufacturer's number	ITB12023B
Manufacturer's date	2012-11-14
NHTSA component	POWER TRAIN

NHTSA's summary

IF YOU CONFIRM: If the customer reports or has previously reported: * Harsher than expected down shifts when coasting to a stop. * Hesitation/lag when accelerating after coasting. * Hesitation/lag or harsher than expected down shifts when coming to a stop and accelerating again (rolling stop). * Engine rev matching during moderate to heavy braking. NOTE: This is normal ASC (Adaptive Shift Control) operation that can be removed from normal drive mode, but will remain in sport mode. ACTION: CAUTION: There are two different possible ECM reprograms based on which generation of TCM is in the vehicle. TCM must be reprogrammed first. * Reprogram TCM first, then using new TCM part number select matching ECM reprogram using Consult III plus. See procedureon next page. See this bulletin for further details.

The document

The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.

Components

Transmission and driveline

Vehicles listed
INFINITI G37	2011

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Other bulletins for the same vehicles and component
ITB13-008D	2023-04-04. Service bulletin. CLICKING NOISE FROM FRONT OR REAR AXLE DURING TAKE-OFF/ACCELERATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB13-008C	2022-10-07. Service bulletin. CLICKING NOISE FROM FRONT OR REAR AXLE DURING TAKE-OFF/ACCELERATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB13-008B	2021-07-10. Service bulletin. CLICKING NOISE FROM FRONT OR REAR AXLE DURING TAKE-OFF/ACCELERATION This bulletin has been amended. See AMENDMENT HISTORY on the last page. Please discard previous versions of this bulletin.
ITB14028A	2021-05-10. Service bulletin. SERVICE INFORMATION The information in this bulletin is provided to help ensure correct diagnosis and repair of fluid leaks. All fluid leaks, when properly diagnosed, should be repaired (whether under warranty or customer pay) to ensure proper vehicle operation. However, certain normal operating conditions can be misdiagnosed as a leak requiring repair. Unnecessary repair or replacement of parts in connection with incorrectly diagnosed "leaks" can negatively impact customer satisfaction, be time consuming and costly, and if not performed correctly can lead to future repairs. See this bulletin for further detail.
ITB13005B	2021-05-10. Service bulletin. IF YOU CONFIRM: The clutch pedal on an applied vehicle does not return to its normal (rested) position after being depressed to the floor OR the customer states the clutch pedal on an applied vehicle does not return to its normal (rested) position after being depressed to the floor AND there are no leaks in the clutch hydraulic system. ACTION: Flush (remove) ALL existing clutch hydraulic system fluid, and refill with GT-R R35 Special Brake Fluid (see PARTS INFORMATION). - Use the SERVICE PROCEDURE in this bulletin for proper flush and refill procedure. See this bulletin for further detail.
ITB14055	2021-05-10. Service bulletin. SERVICE INFORMATION If a customer describes lack of power or poor acceleration, perform the following checks before attempting any repair: * Check for stored DTCs. * Check if the driver is resting their left foot on the brake pedal while accelerating. Advise the customer not to rest their foot on the brake while accelerating. * Use CONSULT-III plus in Engine Data Monitor to check operation of the brake lamp circuit signal. Monitor the brake switch during the incident; it should be "OFF". Please see this bulletn for further details.
ITB14014	2021-05-10. Service bulletin. SERVICE INFORMATION When diagnosing an applied vehicle for possible power steering gear (rack and pinion steering rack, or steering rack) leak issues, in some cases it may appear the steering rack is leaking when actually, it?s not. Use this service bulletin to help make a more accurate diagnosis of the steering rack. - Go to Power Steering Gear Inspection starting on page 2. See this bulletin for further detail.
ITB13008	2021-05-10. Service bulletin. IF YOU CONFIRM: Customers concern of a "clicking" noise coming from either left or right front/rear axles during take-off/acceleration. ACTION: Apply Molykote M77 grease (P/N 44003-7S000) to the hub bearing surfaces. NOTE: * Do not remove the axle from the hub or transmission for this bulletin * Refer to the Electronic Service Manual (ESM) for model specific torque specifications. >Please see Service procedure for 2007-2011 Versa torque specifications on page 5. See this bulletin for further detail.
ITB12027D	2021-05-10. Service bulletin. IF YOU CONFIRM If the customer reports or has previously reported: * Harsher than expected down shifts when coasting to a stop. * Hesitation/lag when accelerating after coasting. * Hesitation/lag or harsher than expected down shifts when coming to a stop and accelerating again (rolling stop). * Engine rev matching during moderate to heavy braking. ACTION 1. Referto step 6 in the SERVICE PROCEDURE to confirm this bulletin applies to the vehicle you are working on. 2. If this bulletin applies, reprogram the ECM and TCM. See this bulletin for further detail.
ITB18-034	2018-12-03. Service bulletin. TRANSMISSION & ENGINE AUTOMATED DATA COLLECTION AND DIAGNOSTIC REPORTING SERVICE INFORMATION To support proper diagnosis and to promote Fixed-Right-First-Time ? Infiniti may review CONSULT-III plus (CIII plus) data relating to vehicle operation and function to help with vehicle diagnosis and diagnostic validation. IMPORTANT: For transmission/engine repair or replacement, retailers are required to connect C-III plus and perform ?Diagnosis (All Systems)?. Performing C-III plus ?Diagnosis (All Systems)? is also required prior to contacting any Infiniti call center (i.e. TECH-LINE, PCC, or WCC) for diagnostic support or claim preauthorization. NOTE: For additional information regarding Automated Vehicle Data Collection, refer to IWBI/18-019. To support Automated Vehicle Data Collection, your C-III plus must have the Diagnosis result reporting function-Setting turned ON. If Diagnosis result reporting function-Setting is OFF: - It may cause dealer consideration for Audit or the Anomalous Repair Control (ARC) program, where applicable. - It may result in a repair being non-warrantable. Refer to the Service Procedure on the next page to confirm your C-III plus ?Diagnosis result reporting function-Setting? is turned ON.