Flash: Powertrain Control Module (Pcm) Updates (18-067-20)

WARNING: This page is about the Grand Cherokee High Altitude, 3.0L Eng VIN M, AWD, which is a different variant/trim than selected.

Publication date: 2020-08-26
Reference number: 18-067-20
Supersedes refnos: 18-014-19, 18-045-18, 18-045-18 REV. A

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-067-20, Date of Issue: August 26, 2020

CHRYSLER:	2018 Jeep Grand Cherokee (WK)
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-014-19, Date of Issue: February 01, 2019

NOTE: This bulletin supersedes Service Bulletin 18-014-19, dated February 1, 2019, which should be removed from your files. All revisions are highlighted with **asterisks** and include updated RRT number and LOP.
This Service Bulletin is also being released as Rapid Response Transmittal **(RRT) 20-049, dated August 26, 2020.** All applicable Sold and Un-Sold RRT VINs have been loaded. To verify this RRT service action is applicable to the vehicle, use VIP or perform a VIN search in DealerCONNECT/Service Library. All repairs are reimbursable within the provisions of warranty.

OVERVIEW

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

MODELS

MODELS CHART

2018

(WK)

Jeep Grand Cherokee

NOTE: This bulletin applies to vehicles within the following markets/countries: North America.

NOTE: This bulletin applies to vehicles equipped with a 3.0L V6 Turbo Diesel Engine (Sales Code EXF).

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) have been set:

P0133-00 - O2 Sensor 1/1 Slow Response.
P20EE-00 - SCR NOX Catalyst Efficiency Below Threshold Bank 1.
P050E-00 - Cold Start Engine Exhaust Temperature Too Low.
P0299 - Turbocharger Underboost Condition.

The following software enhancement is available:

Calibration to correct the On-Board Diagnostic (OBD) system's inability to detect and set DTC P0420 - Catalyst Efficiency (Bank 1) when the Diesel Oxidation Catalyst (DOC) is missing.

DIAGNOSIS

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

If a customer's VIN is listed in VIP or your RRT VIN list, perform the repair. If any vehicle not on the VIN list exhibits the symptom/condition or DTC, perform the repair.

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.

Does the PCM control module have the latest software already installed?
- YES>>> This bulletin has been completed, use inspect LOP **(18-19-04-SB)** to close the active RRT.
- NO>>> Proceed to Step 2 .
Reprogram the PCM with the latest available 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
**18-19-04-SB	Module, Powertrain Control (PCM) -Inspect Only (0 - Introduction)	10 - Diesel	0.2 Hrs.
18-19-04-SC	Module, Powertrain Control (PCM) -Inspect and Reprogram (0 - Introduction)	10 - Diesel	0.3 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is approximately 7 minute. Actual flash download times may be affected by vehicle connection and network capabilities.

FAILURE CODE

The dealer must choose which failure code to use depending on if this is a Rapid Response Transmittal (RRT) or Service Bulletin.

The "RF" failure code is required for essential module flash/reprogramming and can only be used after confirmation that the VIN is included on the RRT.
The failure code "RF" (Required Flash) can no longer be used on Service Bulletin flashes. The "RF" failure code must be used on an RRT.
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 must be supplied.

FAILURE CODE CHART

RF	Required Flash - RRT
CC	Customer Concern