Engine, A/T Controls - Harsh 4-3 Shift/O2 Sensor DTCs
NUMBER: 18-047-11GROUP: Vehicle Performance
DATE: November 03, 2011
HELP USING THE wiTECH DIAGNOSTIC APPLICATION FOR FLASHING AN ECU IS AVAILABLE BY SELECTING "HELP" THEN "HELP CONTENTS" AT THE TOP OF THE wiTECH DIAGNOSTIC APPLICATION WINDOW.
THE wiTECH SOFTWARE LEVEL MUST BE AT RELEASE 12.01 OR HIGHER TO PERFORM THIS PROCEDURE.
SUBJECT:
Flash: Harsh 4-3 Coastdown Shift And Avoid MIL Illumination For Any P0032, P0038, P0052, P0058, P0031, P0037, P0051, P0057
OVERVIEW:
This bulletin involves diagnosis and selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software that prevents the need to replace the PCM when the diagnostic trouble code (DTC's) listed below occur.
MODELS:
2011 (ND) Dakota
NOTE:
This Service Bulletin applies to vehicles equipped with a 3.7L/4.7L engine (Sales Code EKG or EVE) with an 4 speed 42RLE or 5 speed 545RFE automatic transmission (Sales Code DGV or DGQ).
SYMPTOM/CONDITION:
The customer may experience a MIL illumination or harsh 4-3 coastdown shift.
CAUTION:
If the vehicle is not reporting any of the DTC's listed below or just has the harsh 4-3 coastdown shift perform the repair procedure for "REPAIR PROCEDURE FOR VEHICLES THAT HAVE NOT EXPERIENCED MIL OR ONLY HAVE THE HARSH 4-3 COASTDOWN SHIFT". If the vehicle has any of the DTC's perform the "DIAGNOSTIC" procedure.
MIL illumination:
Upon further investigation the Technician may find that any of the following Diagnostic Trouble Codes have been set. If any of the following DTC's have been set perform the Diagnosis.
i. P0032 - 02 Sensor 1/1 Heater Circuit High
ii. P0038 - 02 Sensor 1/2 Heater Circuit High
iii. P0052 - 02 Sensor 2/1 Heater Circuit High
iv. P0058 - 02 Sensor 2/2 Heater Circuit High
v. P0031 - 02 Sensor 1/1 Heater Circuit Low
vi. P0037 - 02 Sensor 1/2 Heater Circuit Low
vii. P0051 - 02 Sensor 2/1 Heater Circuit Low
viii. P0057 - 02 Sensor 2/2 Heater Circuit Low
545RFE Transmission Shifting:
A harsh 4-3 coast down shift. This has been addressed by disabling the fuel shut off during a 4-3 coastdown shift event.
DIAGNOSIS:
Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all engine systems are functioning as designed. If DTC's other then the ones listed above are present record them on the repair order and repair as necessary before proceeding further with this bulletin.
The PCM only needs to be replaced if 2 or more of the Circuit High DTC's are active or stored:
^ P0032 - 02 Sensor 1/1 Heater Circuit High
^ P0038 - 02 Sensor 1/2 Heater Circuit High
^ P0052 - 02 Sensor 2/1 Heater Circuit High
^ P0058 - 02 Sensor 2/2 Heater Circuit High
The PCM only needs to be replaced if 2 or more of the Circuit Low DTC's are active or stored:
^ P0031 - 02 Sensor 1/1 Heater Circuit Low
^ P0037 - 02 Sensor 1/2 Heater Circuit Low
^ P0051 - 02 Sensor 2/1 Heater Circuit Low
^ P0057 - 02 Sensor 2/2 Heater Circuit Low
NOTE:
If two Circuit High DTC's are seen together Or two Circuit Low DTC's are seen together, perform the REPAIR PROCEDURE FOR VEHICLES THAT HAVE EXPERIENCED THE MIL:".
PARTS REQUIRED:
REPAIR PROCEDURE FOR VEHICLES THAT HAVE NOT EXPERIENCED MIL OR ONLY HAVE THE HARSH 4-3 COASTDOWN SHIFT:
NOTE:
Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process.
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
1. Reprogram the PCM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > Standard Procedures > PCM/ECM Programming. After PCM reprogramming, the following must be performed:
a. Clear any DTC's that may have been set in other modules due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allow the tech to clear them.
2. Type the necessary information on the "Authorized Modification Label and attach it near the VECI label.
REPAIR PROCEDURE FOR VEHICLES THAT HAVE EXPERIENCED THE MIL:
1. Replace PCM. Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > removal & installation procedures.
NOTE:
Install a battery charger to ensure battery voltage does not drop below 13.2 volts. Do not allow the charging voltage to climb above 13.5 volts during the flash process.
NOTE:
If this flash process is interrupted/aborted, the flash should be restarted.
2. Reprogram the PCM with the latest software. Follow the detailed service procedures available in DealerCONNECT/TechCONNECT, Refer To Group 8 - Electrical > Electronic Control Modules - Service Information > Module - Powertrain Control > Standard Procedures > PCM/ECM Programming. After PCM reprogramming, the following must be performed:
a. Clear any DTC's that may have been set in other modules due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allow the tech to clear them.
3. Type the necessary information on the "Authorized Modification Label" and attach it near the VECI label.
POLICY:
Reimbursable within the provisions of the warranty.
TIME ALLOWANCE:
FAILURE CODE:
Disclaimer:
This bulletin is supplied as technical information only and is not an authorization for repair.