Hesitation Upon Acceleration (TJ26091)

WARNING: This page is about the XC90 Base, AWD, which is a different variant/trim than selected.

Publication date: 2012-03-27
Reference number: TJ26091

HESITATION UPON ACCELERATION

TECHNICAL SERVICE BULLETIN

Reference Number(s): TJ26091, Date of Issue: March 27, 2012

VOLVO:	2011 and beyond S80, XC60, XC70, XC90
SECTION:	Ignition and Control System
GROUP:	2800
NO.:	US26091.1.0 en-US
Related Ref. Number(s):	VIDA, VSTG, TJ26091

ATTACHMENT

Vehicle Type

VEHICLE TYPE

Type	Eng	Eng Desc	Model Year	Plant	Chassis range	Struc Week Range
124	95	B6324S5	2011-9999	21	0134001-0999999	201020-201216
136	95	B6324S5	2011-9999	21	0094001-0999999	201020-201216
156	95	B6324S5	2011-9999	22	0135000-0999999	201020-201216
275	95	B6324S5	2011-9999	21	0568001-0999999	201020-201216

CSC CUSTOMER SYMPTOM CODES

Code	Description
1Q	Driving/Poor performance/lacks power/At take off
AJ	Driving/Poor performance/lacks power
AL	Driving/Hesitates/surges/During acceleration

DTC DIAGNOSTIC TROUBLE CODES

Text

NOTE: If using a printed copy of this Technical Journal, first check for the latest online version.

DESCRIPTION

A hesitation upon acceleration may be felt by the customer, especially with fuel with a low octane rating. Hot ambient temperature and / or high altitude may make the situation worse. The root cause has been found to be knock limitation (ignition retardation due to knock). This applies to vehicles with engine 95 only.

PRODUCT MODIFICATION

New Engine Control Module (ECM) Software (SW) will be introduced into production during structure week 2012w16.

SERVICE

New ECM SW is now available as a service fix.

With a confirmed hesitation comlaint, perform an ECM Upgrade according to VIDA. If there are any other symptoms, for example Bank 2 misfires and/or knocking noises coming from the oil pan, please also refer to TJ 24516 - Hesitation upon acceleration.

VOLVO STANDARD TIMES GUIDE (VSTG) INFO

Operation number 36004-2 - Software ECM module upgrade - See VSTG

Claims may be submitted under the new car warranty when there is a documented customer complaint using claim type: 01
Labor times are valid at the time of release and are subject to change.