Emissions - OBD Readiness Setting
NUMBER: 18-003-11GROUP: Vehicle Performance
DATE: January 12, 2011
SUBJECT:
Setting Readiness - On Board Diagnostic (OBD) Test OR Inspection And Maintenance Check Will Not Pass
OVERVIEW:
Some vehicles may have difficulty passing an On Board Diagnostic (OBD) system inspection because too many OBD monitors report as not ready, including Comprehensive Component Monitor (CCM) readiness. The Engine Control Module (ECM) may be incapable of setting readiness for CCM without installation of a calibration update, and this inability could contribute to significantly delaying or precluding adequate readiness for an OBD system inspection. Refer to SB 18-030-10 on how to remedy incorrect CCM readiness setting on affected vehicles.
Chrysler LLC has extended the warranty on all affected vehicles to offer reprogramming of the ECM to fix this issue free of charge to the vehicle owner without limitations on age or mileage. With the update, CCM readiness will be set to "Ready upon engine starting, as permitted by California and federal OBD requirements. Vehicle owners that have paid to have the ECM updated to fix the issue in question may submit their receipts and other relevant documentation to Chrysler for reimbursement.
MODELS:
2004 DR Ram Truck (2500/3500 Pick Up)
2005 DH Ram Truck (2500/3500 Pick Up)
NOTE:
This bulletin applies to 2004 & 2005 vehicles equipped with a 5.9L Cummins Diesel Engine (sales code ETH) with California emissions (sales code NAE) built after December 7, 2003.
NOTE:
2004 and 2005 EPA/Federal certified vehicles from the models above were not required to have OBD systems. This bulletin does not apply to such vehicles because they should not be subject to an OBD inspection.
DISCUSSION:
OBD Monitor Information
Detailed information regarding the OBD readiness indicators on affected vehicle is provided below to aid in the setting of readiness when necessary.
The affected vehicles from model year 2004.5 and 2005 have three OBD monitors:
^ Vehicle must be stationary / not moving (Vehicle speed < 2 MPH).
^ Do not depress accelerator pedal (Accelerator Pedal Position 0 percent).
POLICY:
Information Only
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.