MIL ON, O2 Sensor DTC's Set
NO: 14-06-94 Rev. BGROUP: Fuel
DATE: May 20, 1994
SUBJECT:
Check Engine Light On, Code 21, Up or Downstream 02S Shorted to Voltage
THIS BULLETIN SUPERSEDES TECHNICAL SERVICE BULLETIN 14-06-94 REV. A, DATED MAY 6, 1994 WHICH SHOULD BE REMOVED FROM YOUR FILES. THIS BULLETIN PROVIDES FOR REPROGRAMMING THE POWERTRAIN CONTROL MODULE RATHER THAN REPLACING THE MODULE. THE LABOR OPERATION NO. AND TIME HAVE BEEN REVISED TO REFLECT THIS CHANGE, AND INCORRECT OHS REFERENCES ARE CHANGED TO 02S.
MODELS:
1995 (PL) Neon
NOTE:
THIS BULLETIN APPLIES TO VEHICLES BUILT PRIOR TO APRIL 5, 1994 (MDH 04-05-XX).
SYMPTOM/CONDITION:
The "Check Engine" light illuminates with flash code # 21, or Diagnostic Trouble Code "Upstream 02S Shorted To Voltage or Downstream 02S Shorted To Voltage" is set.
DIAGNOSIS:
Using the Mopar Diagnostic System (MDS) or the Scan Tool (DRB III) with the appropriate Diagnostic Procedure Manual, verify that all engine systems are functioning as designed. If Diagnostic Trouble Codes (DTC's) are present, record them on the repair order for future reference. If codes other than "Upstream or Downstream 02S Shorted to Voltage" are present, repair as necessary. If the "Upstream or Downstream 02S Shorted To Voltage" is present and all other systems are functioning correctly, proceed with the following repair.
**EQUIPMENT/PARTS REQUIRED:
1 CH6000 Scan Tool (DRB III)
1 CH7035 General Purpose Interface Bus Cable (GPIB)
1 4669020 Label - Authorized Software Update
1 4275086 Label - Authorized Modification
NOTE:
THE MOPAR DIAGNOSTIC SYSTEM IS REQUIRED TO PERFORM THE FOLLOWING REPAIR AND THE SYSTEM MUST BE OPERATING WITH RELEASE 13 OR HIGHER.
REPAIR PROCEDURE:
This repair involves selectively erasing and reprogramming the powertrain control module with new software (calibrations).
1. Connect the MDS (Mopar Diagnostic System) and DRBIII (Scan Tool) to the vehicle and power them up.
2. Use the arrow keys and select # 2 MDS DIAGNOSTICS on the DRBIII MAIN MENU Screen.
3. Use the arrow keys and select DIAGNOSTIC MENU on the MDS, then press NEXT MENU.
4. Use the arrow keys and select CONTROLLER PROGRAMMING on the MDS, then press NEXT MENU.
5. Use the arrow keys and select PROGRAM CONTROLLER PART on the MDS, then press NEXT MENU.
6. Follow the steps presented on the MDS and DRBIII which will allow the DRBIII to obtain the current part number of the controller.
7. The MDS will display the part number of the controller on the vehicle and the appropriate replacement part number, then press NEXT MENU to begin programming.
If the controller on the vehicle cannot be programmed or has already been programmed, a NO UPDATES AVAILABLE message will be displayed. Check the part number of the controller on the vehicle and compare it to the part number displayed. If the controller has already been updated, proceed to step 9.
8. The MDS and DRBIII will prompt for any operator action needed during the remainder of the programming process.
If the condition is still present after reprogramming the Powertrain Control Module, follow the diagnostic procedure for either "Upstream or Downstream 02S Shorted to Voltage" and repair as necessary.
NOTE:
DO NOT INSTALL ANY GREASE IN THE OXYGEN SENSOR CONNECTOR OR USE ANY SILICONE PRODUCT ON OR NEAR THE OXYGEN SENSOR.
NOTE:
THE FOLLOWING STEPS ARE REQUIRED BY LAW.
9. Type the necessary information on the "Authorized Software Update Label" and attach it to the PCM and cover the label with a clear plastic sticker."
10. Type the necessary information on the Authorized Modification Label and attach the label near the VECI Label.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
Labor Operation No: 08-19-40-96 0.4 Hrs.
FAILURE CODE: FC - Flash Module