Flash: Powertrain Control Module (Pcm) Updates (18-071-18)

Publication date: 2018-09-27
Reference number: 18-071-18
Supersedes refnos: 18-071-17

FLASH: POWERTRAIN CONTROL MODULE (PCM) UPDATES

TECHNICAL SERVICE BULLETIN

Reference Number(s): 18-071-18, Date of Issue: September 27, 2018

CHRYSLER:	2017 Jeep Wrangler (JK)
GROUP:	18 - Vehicle Performance

Superceded Bulletin(s): 18-071-17, Date of Issue: August 10, 2017

NOTE: THIS BULLETIN SUPERSEDES SERVICE BULLETIN 18-071-17, DATED AUGUST 10, 2017, WHICH SHOULD BE REMOVED FROM YOUR FILES. ALL REVISIONS ARE HIGHLIGHTED WITH **ASTERISKS** AND INCLUDE MARKETS, A SYMPTOM/CONDITION AND LOP.

SUBJECT

Flash: Powertrain Control Module (PCM) Updates

OVERVIEW

This bulletin involves reprogramming the Powertrain Control Module (PCM) with the latest available software.

MODELS

MODELS CHART

2017

(JK)

Jeep Wrangler

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

NOTE: This bulletin applies to vehicles equipped with a 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 that the following Diagnostic Trouble Code (DTC) has been set:

P1239 - Engine Oil Temperature Too Low.

**In addition, the customer may notice one of the following conditions:

Hard launch and an increase in engine RPM, when shifting from park to drive. (automatic transmission vehicles only) .
Engine RPM increase at startup and/or between shifts (manual transmission vehicles only) .**

DIAGNOSIS

Using a Scan Tool (wiTECH) with the appropriate Diagnostic Procedures available in TechCONNECT, verify all related systems are functioning as designed. If DTCs or symptom conditions, other than the ones listed 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 all DTCs that may have been set in any module 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-WQ	Module, Powertrain Control (PCM) - Reprogram (0 - Introduction)	1 - Engine Repair and Performance	0.2 Hrs.**

NOTE: The expected completion time for the flash download portion of this procedure is approximately 4 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