XC90 AWD L5-2.5L Turbo VIN 59 B5254T2 (2005)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - Torque Oscillations and/or DTC 9800
NO: 28-59
DATE: 09-07-2005
M. YEAR: XC90, T6, 2005 MY
CHASSIS: 134000-218247
SUBJECT: Torque Oscillation and/or ECM DTC 9800
REFERENCE: VIDA
DESCRIPTION:
With high engine load and low RPM (1400-1600 rpm) it is possible that the engine torque will be greater than allowed by the torque converter clutch,
causing a very brief period of oscillation (1-2 seconds). This can also feel in extreme circumstances like a brief period of engine misfire.
This oscillation may also cause DTC 9800 to be set.
(A typical driving scenario for this concern is: driving up a long steep slope at 60 mph +/-, 1400 RPM +/-, Torque converter locked and cruise control
engaged or very steady throttle pedal. The Torque oscillation can be felt very briefly until torque converter unlocks).
SERVICE:
A new engine software was introduced into production from chassis number 218247, which prevents this Oscillation.If this concern is found on a vehicle
within the chassis limits in the Header, update the engine management software using the Software part number 30677021 (Upgrade ECM) via the
Software Tab in VIDA.
WARRANTY CLAIM INFORMATION
