No. 177-23
Service Bulletin Details
Public Details for: No. 177-23
Technical information for wpr0 - recoding thermal management control unit
Models from 2023
2023 PORSCHE CAYENNE |
2023 PORSCHE CAYENNE E-HYBRID |
2023 PORSCHE CAYENNE GTS |
2023 PORSCHE CAYENNE S |
2023 PORSCHE CAYENNE TURBO |
2023 PORSCHE CAYENNE TURBO GT |
2023 PORSCHE CAYENNE TURBO S E-HYBRID |
Models from 2022
2022 PORSCHE CAYENNE |
2022 PORSCHE CAYENNE E-HYBRID |
2022 PORSCHE CAYENNE GT |
2022 PORSCHE CAYENNE GTS |
2022 PORSCHE CAYENNE S |
2022 PORSCHE CAYENNE TURBO GT |
2022 PORSCHE CAYENNE TURBO S E-HYBRID |
Models from 2021
2021 PORSCHE CAYENNE |
2021 PORSCHE CAYENNE E-HYBRID |
2021 PORSCHE CAYENNE GT |
2021 PORSCHE CAYENNE GTS |
2021 PORSCHE CAYENNE S |
2021 PORSCHE CAYENNE TURBO S E-HYBRID |
Models from 2020
Service Technical Information 177/23 ENU WPR0 2 WPR0 - Re-Coding Thermal Management Control Unit (Workshop Campaign) Important: CRITICAL WARNING -This campaign includes steps where control unit(s) in the vehicle will be programmed with the PIWIS Tester. The vehicle voltage must be maintained between 13.5 volts and 14.5 volts during this programming. Failure to maintain this voltage could result in damaged control unit(s). Damage caused by inadequate voltage during programming is not a warrantable defect. The technician must verify the actual vehicle voltage in the PIWIS Tester before starting the campaign and also document the actual voltage on the repair order. Model Year: As of 2020 up to 2023 Model Line: Cayenne (9YA/9YB) Concerns: Thermal management control unit Cause: Due to the current diagnostic design for monitoring the cooling water changeover valve (UVW3), it is possible that the cooling water changeover valve (UVW3) is incorrectly diagnosed as defective on the affected vehicles. As a result, the Check Engine light in the instrument cluster will be activated, although there is no mechanical or electrical fault present. Action: Re-code the TME control unit with the latest PIWIS Tester software release. Minimum requirement: Release 42.300.030 Affected Vehicles: Only vehicles assigned to the campaign (see also PCSS Vehicle Information) Required tools Tool: • • P90999 - P90999 - PIWIS Tester 4 Battery charger with a current rating of at least 90 A, e.g., VAS 5908 battery charger 90 A Re-code thermal management control unit Work Procedure: 1 Re-code thermal management control unit. The basic procedure to be followed for coding the control unit is described in the Workshop Manual: Workshop Manual 'Basic instructions and procedure for control unit programming using the PIWIS Tester' AfterSales Nov 15, 2023 Page 1 of 3 2 Service Technical Information ENU 177/23 WPR0 Specific information on control unit coding as part of this campaign Required PIWIS Tester software release: 42.300.030 (or higher) Type of control unit coding: Control unit coding using the ‘Automatic coding’ function for the control unit: ‘Thermal management’ (TME) control unit – ‘Coding / programming’ menu – ‘Automatic coding’ function. Read and follow the information and instructions on the PIWIS Tester during the guided coding sequence. Coding sequence: Do not interrupt the coding sequence. When coding is complete, the message ‘Coding has been completed successfully’ is displayed and a tick appears in the “Status” box. Procedure if control unit coding is not successful: 2 3 Repeat control unit coding. Read out and delete all control unit error memories. 2.1 Press •F7“ in the control unit selection screen (‘Overview’ menu) to call up the Additional menu. 2.2 Select the function “Read all error memories and delete if necessary” and press •F12“ (‘Next’) to confirm. Enter campaign in the Warranty and Maintenance logbook. Warranty processing Scope 1: Labor time: Re-code thermal management control unit Includes: Connecting and disconnecting battery charger Connecting and disconnecting PIWIS Tester Reading out and deleting fault memories Damage number WPR0 066 000 1 Nov 15, 2023 Page 2 of 3 AfterSales Labor time: 23 TU Service Technical Information 177/23 ENU WPR0 2 Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester are the ones that must be followed. © 2023 Porsche Cars North America, Inc. AfterSales Nov 15, 2023 Page 3 of 3