NHTSA ID Number: 11028575
Manufacturer Communication Number: No. 71-25
TSB/Document Date: 2026-02-06
Summary
Technical information for Information on Y-Measuring Cables and Possible Locations
Service
Technical Information
71/25
ENU
9X00
9
Information on Y-Measuring Cables and Possible Locations (71/25)
Model Line:
All model lines
Information
The Y-measuring cables described can generally be used on all Porsche
vehicles even if this Technical Information is not available for every specific vehicle in PCSS.
Model Year:
As of 2017
Concerns:
Y-measuring cables (Y-measuring adapters)
Information:
Y-measuring cables are now available for vehicle diagnosis via Porsche AG (PAG).
The use of Y-measuring cables is recommended to facilitate meaningful and reliable measurements.
The measurement cables allow measurements in the active circuit, i.e. in the current-loaded state, which
depicts realistic operating conditions.
This allows sensor signals and actuator activation to be detected in real-time operation using an oscilloscope
or measuring device. By using these test leads, we are getting more accurate results because of the low
contact resistance. Using conventional multimeter leads might cause bad readings due to high contact resistances. This significantly improves the quality and accuracy of the measurements.
The Y-measuring cables are connected between the wiring harness-side plug and the component and have
branches for connecting measuring devices.
In some cases, the measuring cables are designed with individual lines, which makes it much easier to
connect a current-measuring amp clamp and thus facilitates a combined measurement of voltage and
current measurement with the oscilloscope.
WARNING
High voltage on rod ignition modules, fuel injectors and other live parts
•
Severe burns or death
•
Electric shock upon contact with live parts
•
Health risks for persons with life-assisting systems
Þ
⇒
Only start the engine if the rod ignition modules, fuel injectors and other live parts are completely installed and
connected.
Þ
⇒
Only perform work on the rod ignition modules, fuel injectors and other live parts when the ignition is switched off.
Þ
⇒
Only install measuring cables when the ignition is switched off.
AfterSales
Jan 27, 2026
Page 1 of 12
9
Service
9X00
Tools: (As of
January 2026)
ENU
Technical Information
71/25
Tool
Name
MRT / Opt
VAS 5256
Adapter, measuring technology /
DSO, 2-pin
MRT
VAS 5256 / 1
Adapter, measuring technology /
DSO, 2-pin
Not Available through PAG
VAS 5257
Adapter, measuring technology /
DSO, 3-pin
MRT
VAS 5258A
Adapter for measuring equipment
/ DSO, 4-pin
Optional
VAS 5259
Adapter, measuring technology /
DSO, 2-pin
Optional
VAS 5260A
Adapter for measuring equipment
/ DSO
MRT
VAS 5570
Adapter, measuring technology /
DSO, 3-pin
Optional
VAS 5571
Adapter, measuring equipment /
DSO, 2+3-pin
MRT
VAS 5577
Adapter, measuring technology /
DSO, 4-pin
Optional
VAS 5578
Adapter for measuring equipment
/ DSO
Optional
VAS 5579
Adapter for measuring equipment
/ DSO, 8-pin
Optional
VAS 5583
Adapter for measuring equipment
/ DSO
Optional
Overview of known measuring points
Overview:
Jan 27, 2026
Page 2 of 12
Location
Model line
Engine
variant/location
(if relevant)
Plug-in contact
part number
Suitable
measuring cable
Front axle and rear
axle damper valve
Macan (95B)
-
8K0973702
Rear axle damper
valve
911 (992)
-
8K0973702D
VAS 5256
- Adapter,
measuring
equipment/DSO,
2-pin
AfterSales
Service
Technical Information
71/25
Rear axle air spring
valve
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
8K0973702D
CAN air
suspension
compressor
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
8K0973702D
Front axle damper
valve
Taycan
(Y1A/Y1B/Y1C)
-
8K0973702E
12-volt air
suspension
compressor
Macan (95B)
-
1J0973752
12-volt air
suspension
compressor
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
3B0973752A
Rear axle damper
valve
Cayenne
(9YA/9YB)
-
9Y0973752B
Front axle damper
valve
Cayenne
(9YA/9YB)
-
9Y0973752E
9Y0973752D
Front axle level
sensor
911 (992)
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
8K0973703
Air suspension
compressor valves
Macan (95B)
-
8K0973703
Rear axle level
sensor
911 (992)
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
8K0973703G
AfterSales
ENU
9X00
9
VAS 5257
- Adapter,
measuring
equipment/DSO,
3-pin
Jan 27, 2026
Page 3 of 12
9
Service
9X00
Jan 27, 2026
Page 4 of 12
ENU
Technical Information
71/25
Air suspension
compressor valves
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
4D0971993
VAS 5570
- Adapter,
measuring
equipment/DSO,
3-pin
Wheel acceleration
sensor
Panamera (971)
Taycan
(Y1A/Y1B/Y1C)
-
971973752
VAS 5571 Adapter
Front axle air
spring valve on
air spring
Taycan
(Y1A/Y1B/Y1C)
-
971973752
Body acceleration
sensor
911 (992)
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
4H0973323
Air suspension
valve block
Macan (95B)
Panamera (971)
Cayenne
(9YA/9YB)
-
4H0973715
Air suspension
valve block
Taycan
(Y1A/Y1B/Y1C)
-
4H0973715A
Rear axle valve
block
911 (992)
-
4H0973715A
Wheel speed
sensor
911 (992)
Panamera (971)
Cayenne
(9YA/9YB)
Taycan
(Y1A/Y1B/Y1C)
-
6E0973702
VAS 5256/1
- Adapter,
measuring
equipment/DSO,
2-pin
Front axle air
spring valve,
wheel housing
connection point
Panamera (971)
Taycan
(Y1A/Y1B/Y1C)
-
4HO973712
VAS 5258A
- Adapter for
measuring
equipment/DSO,
4-pin
AfterSales
VAS 5583 Adapter for
measurement and
test equipment
Service
Technical Information
71/25
ENU
9X00
9
Power steering
control unit
911 (992)
Taycan
(Y1A/Y1B/Y1C)
-
4H0973713
Rear axle steering
control unit
911 (992)
Cayenne
(9YA/9YB)
-
4H0973713A
Power steering
control unit
Macan (95B)
-
4H0973713H
Engine mount
911 (992)
-
4H0973713K
Engine mount
718 (982)
-
4H0973713B
Valve lift
adjustment
911 (992)
3.0 liter
1040049732
VAS 5260A
- Adapter for
measuring
equipment/DSO
Parking lock
solenoid
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TSB/Document ID: No. 71-25
Replacement Service Bulletin Number:
MFR Communication Date: 2026-01-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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