No. 2215
Service Bulletin Details
Public Details for: No. 2215
Instructions on advanced technical information for the panamera e-hybrid - thermal management control unit.
Models from 2021
2021 PORSCHE PANAMERA 4 E-HYBRID |
Models from 2020
2020 PORSCHE PANAMERA 4 E-HYBRID |
Models from 2019
2019 PORSCHE PANAMERA 4 E-HYBRID |
8 Bulletin #: 2215 Advanced Technical Information Part ID: 8274 Panamera E-Hybrid – Thermal Management Control Unit Fault P26B100 Causes Check Engine Light Vehicles Affected Models Model Year Model Type VIN Range Vehicle-Specific Equipment Panamera As of 2019 up to 2020 97ABE1 97AFH1 97BBE1 97BFH1 97CBE1 97CFH1 N/A E-Hybrid Panamera 2021 97ABX1 97ADZ1 97AFT1 97BBX1 97BDZ1 97BFT1 97CBX1 97CDZ1 97CFT1 N/A E-Hybrid Revision History Revision Release Date Changes 0 May 31, 2022 Original document Condition The customer complains of the presence of a check engine light in the instrument cluster. The workshop finds fault code P26B100 – Directional-control valve for high-temperature circuit (UVW3) – function implausible stored in the Thermal management control unit (TME). AfterSales May 31, 2022 Page 1 of 4 Bulletin #: 2215 Advanced Technical Information Part ID: 8274 8 Technical Background There is a possibility that the aforementioned fault code sets due to the TME diagnostics not being robust enough. While the combustion engine temperature is < 40 °C (104 °F), the changeover valve UVW3 will remain closed such that the passenger compartment is heated via the HV interior heater on the small coolant circuit. During small circuit operation, the absolute value of the temperature difference between temperature sensors TW11 and TW12 should be > 7 K (> 7 °C). Large circuit Small circuit Figure 1: Panamera E-Hybrid Cooling Circuit Once the combustion engine temperature is within the range of 40 to 60 °C (104 to 140 °F), the valve UVW3 opens and the coolant circuit is operating on the large circuit that includes the combustion engine circuit. During large circuit operation, the absolute value of the temperature difference between temperature sensors TW11 and TW12 should be < 7 K (< 7 °C). During short operation of the combustion engine after cold start, the coolant temperature may rise to the range of 40 to 60 °C (104 to 140 °F) and valve UVW3 may or may not open. There is a possibility that the valve remains closed and waste heat from the engine continues to heat up temperature sensor TW12. If the valve is closed and sufficient waste heat exists, the absolute value of the temperature difference between sensors TW11 and TW12 may fall below the 7 K (7 °C) threshold. Such conditions may cause the TME to believe valve UVW3 is stuck in an AfterSales May 31, 2022 Page 2 of 4 Bulletin #: 2215 Advanced Technical Information Part ID: 8274 8 incorrect position (e.g., closed when it should be open), despite the system functioning properly. This misdiagnosis may set fault code P26B100 in the TME. To address this concern, please perform the following: 1. Open a PCSS job and create a VAL. 2. In the VAL, find TME fault P26B100 and open the fault information. Check the value of 13_Fault display in the instrument cluster. If this value is “on”, this fault is the cause of the check engine light. 3. 4. 5. Find the Thermal management control unit (TME) in the “Overview” tab in the PIWIS Tester and select it. Navigate to the “Extended Identifications” tab to view the control unit information. Check the current software level in the TME. The current SW level should correspond to one of the two Factory SW Levels given in Table 1 below. Please navigate to the Overview tab in the PIWIS Tester and select “Additional menu” on the bottom toolbar. Select “Campaign” from the list and use the Programming Code given in Table 1 below. Model Year Factory SW Level Programming Code SW Level after Programming 2019 0303 G2T8E 0305 2020 0303 G2T8E 0305 2021 0304 G2T8E 0305 Table 1: TME Software Updare Information 6. 7. After programming is complete, navigate to the “Extended identifications” tab for the TME. Verify that the control unit successfully updated to the Final SW Level given in Table 1. Please also create an “After repair” VAL. If the fault persists after updating the TME to SW Level 0305, please ensure the coolant system is properly filled and bled and that there are no electrical or mechanical faults with valve UVW3 or with temperature sensors TW11 and TW12. Please also check coolant hoses for proper routing and/or restrictions. AfterSales May 31, 2022 Page 3 of 4 Bulletin #: 2215 Advanced Technical Information Part ID: 8274 8 Warranty As always, please document the repair completely in PQIS. For this repair, please code the “cause” as follows: Cause location: 82740 Directional-control valve Cause symptom: 1613 No function occasionally Use the following troubleshooting labor operations: 03350000 On board diagnostic 19292565 Thermal management control unit program Search Items Panamera, 971, 97A, 97B, 97C, check engine light, TME, thermal management, P26B100, hybrid 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. K11468 ©2022 Porsche Cars North America, Inc. AfterSales May 31, 2022 Page 4 of 4