Engine Controls - Avoid Multiple DTC's Software Update
NUMBER: 18-051-11GROUP: Vehicle Performance
DATE: November 17, 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: 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 or if necessary replacing the PCM based on the DIAGNOSIS. This new software once reprogrammed in the PCM will prevent the need to replace the PCM when the diagnostic trouble code (DIG's) listed below occur as a pair.
MODELS:
2011 (KA) Nitro
2011 (KK) Liberty
NOTE:
This Service Bulletin applies to vehicles equipped with a 3.7L or 4.0L engine (Sales Code EKG or EGS).
SYMPTOM/CONDITION:
The customer may experience a MIL illumination.
CAUTION:
If the vehicle is reporting any of the DTC's found in the list below perform the "DIAGNOSIS".
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
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 below 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
If 2 Circuit High DTCs are seen together Or 2 Circuit Low DTCs are seen together, perform the "REPAIR PROCEDURE FOR VEHICLES THAT HAVE EXPERIENCED THE MIL:".
If the above DTC's are not being set as a "circuit high" pair or a "circuit low" pair then perform the "REPAIR PROCEDURE FOR VEHICLES THAT HAVE NOT EXPERIENCED THE MIL: and perform the appropriate diagnostic procedures available in DealerCONNECT/TechCONNECT".
PARTS REQUIRED:
REPAIR PROCEDURE FOR VEHICLES THAT HAVE NOT EXPERIENCED MIL:
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:
NOTE:
Only perform this procedure if the above DTC's have been identified to be a "circuit high" pair or a "circuit low" pair.
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.