NHTSA ID Number: 10252518
Manufacturer Communication Number: No. 173-21-1
TSB/Document Date: 2024-04-03
Summary
Technical information for a warning message - "coolant temperature too high" checking coolant pump and change over valve
pipe (V8 Biturbo)'
2
Connect a suitable battery charger with a current rating of at least 90 A, e.g. battery charger 90
A, to the jump-start terminals in the luggage compartment and switch it on. Workshop Manual
'270689 Charging vehicle electrical system battery'
3
Place driver’s key in emergency start tray.
4
Connect P90999 - PIWIS Tester 4 to the vehicle
communication module (VCI) via the USB cable,
connect communication module to the vehicle and
switch on PIWIS Tester.
5
Switch on ignition.
6
On the PIWIS Tester start screen, call up the “Diagnostics” application.
The vehicle type is then read out, the diagnostic application is started and the control unit selection screen
is populated.
Mar 12, 2024
Page 4 of 9
AfterSales
Emergency start tray
Service
Technical Information
173/21 ENU
1950
1
Checking change-over valve for coolant pump and replacing it if necessary (V6 Turbo)
Work
Procedure:
Position of change-over valve and coolant pump
1
Pull vacuum hose Position of change-over valve and coolant pump -1- off the coolant pump
Position of change-over valve and coolant pump -2-.
2
Pull off vacuum hose Position of change-over valve and coolant pump -4- from the control valve
Position of change-over valve and coolant pump -3-.
3
VAS 6213 - Hand vacuum pump must be Position of change-over valve and coolant pump -3connected to the change-over valve Position of change-over valve and coolant pump -4- on the
vacuum hose connection. Then build up vacuum.
Information
Stop the test procedure if a vacuum cannot be built up. In this case, the change-over valve is faulty
and must be replaced. Continue with Step 5. If a vacuum can be built up, continue with Step 4.
AfterSales
Mar 12, 2024
Page 5 of 9
1
Service
Technical Information
ENU 173/21
1950
4
Perform drive link test:
4.1
Select “Motor electronics (DME)” control unit.
4.2
Select the “Drive links/checks” menu.
4.3
Select “Drive links” and press •F12“ Next to confirm.
4.4
Select “Activation of vacuum switchover valve for main coolant pump” and press
•F8“ to start.
•
•
If the vacuum in the vacuum pump display changes, the change-over valve Position
of change-over valve and coolant pump -3- is intact. Continue with Step 5. In this case,
only Position of change-over valve and coolant pump -2- replace the coolant pump if
it is faulty.
If the vacuum in the vacuum pump display does not change, the change-over valve
Position of change-over valve and coolant pump -3- and, if necessary, the coolant pump
Position of change-over valve and coolant pump -2- must be replaced, if the coolant
pump is Position of change-over valve and coolant pump -2- also faulty.
Workshop Manual '195019 Removing and installing coolant pump (V6 biturbo)'
Mar 12, 2024
Page 6 of 9
5
Disconnect VAS 6213 - hand vacuum pump from the vacuum hose Position of change-over
valve and coolant pump -1-.
6
Install vacuum hose Position of change-over valve and coolant pump -1- on coolant pump
Position of change-over valve and coolant pump -2-.
AfterSales
Service
Technical Information
173/21 ENU
1950
1
Checking change-over valve for coolant pump and replacing it if necessary (V8 Biturbo)
Work
Procedure:
Position of change-over valve and coolant pump
1
Pull vacuum hose Position of change-over valve and coolant pump -1- off the coolant pump
Position of change-over valve and coolant pump -2-.
2
Pull off vacuum hose Position of change-over valve and coolant pump -4- from the control valve
Position of change-over valve and coolant pump -3-.
3
VAS 6213 - Hand vacuum pump must be Position of change-over valve and coolant pump -3connected to the change-over valve Position of change-over valve and coolant pump -4- on the
vacuum hose connection. Then build up vacuum.
Information
Stop the test procedure if a vacuum cannot be built up. In this case, the change-over valve is faulty
and must be replaced. Continue with Step 5. If a vacuum can be built up, continue with Step 4.
4
Perform drive link test:
4.1
Select “Motor electronics (DME)” control unit.
4.2
Select the “Drive links/checks” menu.
AfterSales
Mar 12, 2024
Page 7 of 9
1
Service
Technical Information
ENU 173/21
1950
4.3
Select “Drive links” and press •F12“ Next to confirm.
4.4
Select “Activation of vacuum switchover valve for main coolant pump” and press
•F8“ to start.
•
•
If the vacuum in the vacuum pump display changes, the change-over valve Position
of change-over valve and coolant pump -3- is intact. Continue with Step 5. In this case,
only Position of change-over valve and coolant pump -2- replace the coolant pump if
it is faulty.
If the vacuum in the vacuum pump display does not change, the change-over valve
Position of change-over valve and coolant pump -3- and, if necessary, the coolant pump
Position of change-over valve and coolant pump -2- must be replaced, if the coolant
pump is Position of change-over valve and coolant pump -2- also faulty.
Workshop Manual '195019 Removing and installing coolant pump (V8 Biturbo)'
5
Disconnect VAS 6213 - hand vacuum pump from the vacuum hose Position of change-over
valve and coolant pump -1-.
6
Install vacuum hose Position of change-over valve and coolant pump -1- on coolant pump
Position of change-over valve and coolant pump -2-.
Follow-up actions (V6 Turbo)
Work Procedure: 1
Switch off ignition.
2
Disconnect P90999 - PIWIS Tester 4 from the vehicle.
3
Remove the driver’s key from the emergency start tray.
4
Switch off and disconnect the battery charger.
5
Install belt pulley. Workshop Manual '195319 Removing and installing pulley (V6 turbo)'
6
Install air guide. Workshop Manual '243619 Removing and installing air guide (V6 turbo)'
Follow-up actions (V8 Biturbo)
Work Procedure: 1
Mar 12, 2024
Page 8 of 9
Switch off ignition.
2
Disconnect P90999 - PIWIS Tester 4 from the vehicle.
3
Remove the driver’s key from the emergency start tray.
4
Switch off and disconnect the battery charger.
5
Install pressure pipe on the right. Workshop Manual '214119 Removing and installing pressure
pipe (V8 Biturbo)'
AfterSales
Service
Technical Information
173/21 ENU
1950
1
Labor position and PCSS encryption (V6 Turbo)
Labor position:
APOS
Labor operation
19505520
Replace coolant pump
19505521
Replace coolant pump
I No.
PCSS encryption:
Location (FES5)
19500
Coolant pump
Damage type (SA4)
5000
leakages
References:
Workshop Manual '270689 Charging vehicle electrical system battery'
Workshop Manual '243619 Removing and installing air guide (V6 turbo)'
Workshop Manual '195319 Removing and installing pulley (V6 turbo)'
Workshop Manual '195019 Removing and installing coolant pump (V6 biturbo)'
Labor position and PCSS encryption (V8 Biturbo)
Labor position:
I No.
APOS
Labor operation
19505540
Replacing coolant pump (checking change-over
valve)
19505541
Replacing coolant pump (checking, removing and
installing change-over valve)
PCSS encryption:
Location (FES5)
19500
Coolant pump
Damage type (SA4)
5000
leakages
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.
© 2024 Porsche Cars North America, Inc.
AfterSales
Mar 12, 2024
Page 9 of 9
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- Formulated to replace the OEM fluid in Asian make vehicles...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications...
- Contains 30 – 50 ppm of denatonium benzoate as a bittering...
- Formulated to replace the OEM fluid in Asian make vehicles...
- 5 year/150, 000 mile . Silicate-free, long-life, phosphate...
- The long life formula provides protection for all cooling...
- Meets the following OEM and industry specifications: JIS K...
- Note: Please check the vehicle specification before...
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TSB/Document ID: No. 173-21-1
Replacement Service Bulletin Number:
MFR Communication Date: 2024-03-12
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
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