Flash: Powertrain Control Module (Pcm) Updates (18-030-21)

WARNING: This page is about the Gladiator 80th Anniversary Edition, 3.0L Eng VIN M, Full Time T/Case Control, which is a different variant/trim than selected.

Publication date: 2022-12-01
Reference number: 18-030-21
Supersedes refnos: 18-002-22, 18-002-22 REV. A

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-002-22 REV. A, Date of Issue: December 01, 2022

CHRYSLER:	2021 (JT) Jeep Gladiator
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-002-22, Date of Issue: January 05, 2022

NOTE: This bulletin supersedes Technical Service Bulletin (TSB) 18-002-22, date of issue January 05, 2022, which should be removed from your files. All revisions are highlighted with **asterisks** and include a new additional Diagnostic Trouble Codes (DTCs), additional symptoms/conditions and LOP.
This Technical Service Bulletin (TSB) has also been released as a Rapid Service Update (RSU) 22-002, date of issue January 05, 2022. All applicable Sold and Un-Sold RSU VINs have been loaded. To verify this RSU 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. This RSU will expire 18 months after the date of issue.

OVERVIEW

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

MODELS

MODELS CHART

2021

(JT)

Jeep Gladiator

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

NOTE: This bulletin applies to vehicles built on or before equipped with a 3.0L V6 Turbo Diesel Engine W/ESS (Sales Code EXJ).

SYMPTOM/CONDITION

Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further investigation, a technician may find one or more of the following DTCs have been set:

**P016F - Closed Loop Fuel Pressure Control At Limit - Pressure Too Low.
P025C - Fuel Pump Module Control Circuit Low.
P0300-00 - Multiple Cylinder Misfire.
P0301-00 - Cylinder 1 Misfire.
P0302-00 - Cylinder 2 Misfire.
P0303-00 - Cylinder 3 Misfire.
P0304-00 - Cylinder 4 Misfire.
P0305-00 - Cylinder 5 Misfire.
P0403-00 - EGR Control Circuit Open (Disabled Fault).
P208B - Reductant Pump 1 Control Performance.**
P04DB - Crankcase Ventilation System Disconnected.
P040F - EGR Temperature Sensor A-B Correlation.
P225D - Nox Sensor 1/1 Performance - Signal Stuck Low.
P0088 - Fuel Rail Pressure Too High.
P0404 - EGR "A" Control Circuit Range/Performance.
P20C6 - Reductant Heater 4 Control Circuit Performance.
P0524 - Low oil pressure (during start up in cold ambient temps).
P249C-00 - Excessive Time To Enter Closed Loop Reductant Injection Control.
P02E8-00 - Diesel Intake Air Flow Position Sensor Circuit Low.
P20FB-00 - Reductant Pump 2 Control Performance.
P065A-00 - Generator System Performance.

Customers may experience one or more of the following:

Slow acceleration.
Reduced vehicle speed & torque in high and 4 low.
Poor cold idle stability.
Poor idle quality with AC on.
Excessive engine speed oscillations at tachometer red-line.
Following a long key-on situation, poor cold start and idle stability.
Cold hard start/extended crank.
Block heater not providing a proper cold start and stable idle.
High idle speeds at altitude when remote start is active.
The cruise control and speed limited set speed doesn't match the speedometer. It could be up to 2.5 kph (1.5 mph) difference.

Other Software enhancements:

**Low speed engine idle improvements.
Improved engine restart performance and torque response during low fuel level and/or hot ambient conditions.**
Corrects instances of vehicles restarting once SRC Inducement is active, and the mileage countdown has expired.
Reduce engine delay during cold start garage shifts.
Improve idle stability, Improvement of cold start and combustion stability after start during cold ambient temperatures.
Eliminate turbocharger surge on tip-out.
Eliminate idle oscillation in park and drive.
Speedometer accuracy improvement(s).
Cruise control updates.
Battery durability improvements in hot ambient temperatures.

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 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 RSU 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.

Is the vehicle on the RSU VIN list?
- YES>>> Proceed to Step 2
- NO>>> Proceed to Step 3 .
Is the PCM software at the latest version?
- YES >>> This bulletin has been completed, use inspect LOP (18-19-04-ST) to close the active RSU. Normal diagnosis should be performed
- NO >>> Proceed to Step 3 .
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
18-19-04-ST	Module, Powertrain Control (PCM) - Inspect (0 - Introduction)	10 - Diesel	0.2 Hrs.
**18-19-04-TE	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 9 minutes. 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 Service Update (RSU) or Technical 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 RSU.
The failure code "RF" (Required Flash) can no longer be used on Technical Service Bulletin flashes. The "RF" failure code must be used on an RSU.
If the customer's concern matches the SYMPTOM/CONDITION identified in the Technical 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 - RSU
CC	Customer Concern