Engine Controls - MIL ON/Multiple DTC's
NUMBER: 18-007-12GROUP: Vehicle Performance
DATE: February 07, 2012
THIS BULLETIN SUPERSEDES SERVICE BULLETIN 18-054-11, DATED DECEMBER
15, 2011, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE THE RELEASE OF NEW
SOFTWARE THAT INCLUDES 2012 VEHICLES BUILT UP TO JANUARY 23, 2012 AND FURTHER ENHANCEMENTS FOR MONITORING MIL P0441.
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 12.02 OR HIGHER TO PERFORM THIS PROCEDURE.
SUBJECT:
Flash: MIL Illumination P0441, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0420, P0430, P0133, P0153, P0835
OVERVIEW:
This bulletin involves selectively erasing and reprogramming the Powertrain Control Module (PCM) with new software.
MODELS:
2012 (JK) Wrangler
NOTE:
This bulletin applies to vehicle equipped with a 3.6L engine (sales code ERB) built before **January 24, 2012 (MDH 0124XX)**.
SYMPTOM/CONDITION:
The customer may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the Technician may find that any of the following Diagnostic Trouble Codes (DTC's) have been set.
a. **P0441 - Evap Purge System Performance**
b. P0420 - Catalyst Efficiency (Bank 1)
c. P0430 - Catalyst Efficiency (Bank2)
d. P0133 - 02 Sensor 1/1 Slow Response
e. P0153 - 02 Sensor 2/1 Slow Response
f. P0300 - Multiple Cylinder Misfire
g. P0301 - Cylinder 1 Misfire
h. P0302 - Cylinder 2 Misfire
i. P0303 - Cylinder 3 Misfire
j. P0304 - Cylinder 4 Misfire
k. P0305 - Cylinder 5 Misfire
l. P0306 - Cylinder 6 Misfire
m. P0835 - Clutch Pedal Switch "B" Circuit High Manual Transmission Vehicles Only
Updating the software will correct the conditions listed above.
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.
If the customer describe the symptom/condition or if the technician finds the DTC, perform the Repair Procedure.
PARTS REQUIRED:
REPAIR PROCEDURE:
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.
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.