Flash: Powertrain Control Module (Pcm) Updates (18-108-20)

WARNING: This page is about the 300 Limited, 4WD, Gas, which is a different variant/trim than selected.

Publication date: 2020-12-10
Reference number: 18-108-20
Supersedes refnos: 18-099-19

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-108-20, Date of Issue: December 10, 2020

CHRYSLER:	2019 Chrysler 300 (LX)
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-099-19, Date of Issue: December 14, 2019

NOTE: This bulletin supersedes Technical Service Bulletin (TSB) 18-099-19, date of issue December 14, 2019, which should be removed from your files. All revisions are highlighted with **asterisks** and include additional Diagnostic Trouble Codes (DTCs) and LOP.

OVERVIEW

This bulletin involves reprogramming the PCM with the latest available software.

MODELS

MODELS CHART

2019

(LX)

Chrysler 300

NOTE: This bulletin applies to vehicles within the following markets/countries: North America, APAC, EMEA and LATAM.

NOTE: This bulletin applies to vehicles equipped with 3.6L V6 24V VVT Engine (Sales Code ERB).

SYMPTOM/CONDITION

**Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation the technician may find one or more of the following Diagnostic Trouble Codes (DTCs):

P0420 - Catalyst System Efficiency Below Threshold Bank 1
P0430 - Catalyst System Efficiency Below Threshold Bank 2.**

Customers may describe the following:

Hearing a pre-detonation noise (Spark Knock) sound in the engine during acceleration.

DIAGNOSIS

Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in DealerCONNECT/Service Library, verify all related systems are functioning as designed. If Symptom/Conditions, other than the one listed above are present, record the issues on the repair order and repair as necessary before proceeding further with this bulletin.

If the customer describes the symptom/condition listed above or if the technician finds the DTC, perform the Repair Procedure.

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.

Reprogram the PCM with the latest software. Detailed instructions for flashing control modules using the wiTECH Diagnostic Application are available by selecting the application's "HELP" tab.
Clear any DTCs that may have been set in any modules due to reprogramming. The wiTECH application will automatically present all DTCs after the flash and allow them to be cleared.

POLICY

Reimbursable within the provisions of the warranty.

TIME ALLOWANCE

TIME ALLOWANCE CHART

Labor Operation No:	Description	Skill Category	Amount
**18-19-06-CS	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair and Performance	0.3 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is approximately 5 minutes. Actual flash download times may be affected by vehicle connection and network capabilities.

FAILURE CODE

The dealer must use failure code CC with this Service Bulletin.

If the customer's concern matches the SYMPTOM/CONDITION identified in the Service Bulletin, failure code CC is to be used.
When utilizing this failure code, the 3C's (customer's concern, cause and correction) must be provided for processing Service Bulletin flash/reprogramming conditions.

FAILURE CODE CHART

CC	Customer Concern