Mecanica A

PREVENTIVE MAINTENANCE

Section 2

2.1 PROGNOSTICS Model Year 09 (MY09) transmissions and later are equipped with a Prognostics system, consisting of control valve module hardware, the shift selector, the Transmission Control Module (TCM) configuration and the calibration designed to monitor fluid life, fluid filter life, and clutch life. MY09 Prognostics may be used only if TES 295 fluid is inthe transmission. January 2010 Prognostics allows Prognostics features using TES 389 or TES 295 fluid. If fluid change, filter change, or clutch service is not performed within a set period of time, a Diagnostic Trouble Code (DTC) sets with a CHECK TRANS light, and/or a TRANS SERVICE indicator (shown as the wrench icon) in the shift selector or as an additional light in the dash. Prognostics can bereset through the Allison DOC® For PC–Service Tool or, if calibrated to allow manual reset, through manipulating the shift selector. 2.1.1 TRANS SERVICE Indicator (Wrench Icon). The TRANS SERVICE indicator illuminates in the event a service condition relating to a transmission clutch, fluid or filter life occurs. The TRANS SERVICE indicator is located between the SELECT and MONITOR displays on theshift selector display. Refer to Figure 2–1.

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Figure 2–1. Typical Allison 4thGeneration Prognostics Controls Shift Selectors with Trans Service Indicator 2.1.2 Prognostics Prerequisites. The following requirements must be met to use the Prognostics features and functions: • Vehicle harness has a wire for the filter life indicator switch (wire 118). • The OEM has ordered your calibration fromAllison Transmission with Prognostics enabled. NOTE: It is important to note that if Prognostics is disabled, it is not available at all in the calibration. This is different than the OEM ordering your calibration with Prognostics off. Defaulting Prognostics off means it could be enabled in the future without recalibrating to a different calibration provided the other conditions are met to usePrognostics. • If the CIN starts with 4A, use TES 295 transmission fluid. If the CIN starts with 4C, TES 295 or TES 389 transmission fluid may be used. • Using Allison Transmission High Capacity Main and Lube Filters. • Using Allison 4th Generation Controls with Prognostics keypad pushbutton or lever shift selector. Refer to Figure 2–2.

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Figure 2–2. Typical Allison 4th Generation PrognosticsShift Selectors

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NOTE: Allison Transmission may approve some OEM selectors for Prognostics, provided the TRANS SERVICE indicator or message display is integrated by the OEM. At the time of this publication there are no capable OEM selectors for Prognostics. 2.1.3 Prognostics Features Availability. The vehicle manufacturer specifies whether they want Allison Prognostics Feature Package to bemade available in the calibration and in what configuration, for example defaulted on or off. The Oil Life Monitor (OM), Filter Life Monitor (FM), and Transmission Health Monitor (TM) are the individual functions included in the Allison Prognostics Feature Package. These individual functions cannot be turned on or off separately within the Allison Prognostics Feature Package. The transmissioncalibration can be made for the vehicle manufacturer (or the customer) so the Prognostics Feature is in one of the following states: • Available and the Prognostics features are currently on and therefore monitoring the OM, FM, and TM. • Available and the function is currently off and therefore available but not currently monitoring OM, FM, and TM. • Disabled and therefore not available within thisTransmission Control Module (TCM) calibration. 2.1.4 Procedure To Turn Prognostics On And Off. Methods to turn the Prognostics Package Features on or off (provided all other requirements are met), include the following: 1. Through the shift selector (if allowed by TCM programming). 2. Using the Allison DOC® For PC–Service Tool, CMC can be toggled to enabled or disabled for the Allison Prognostics...