Advanced Technical Information
High-Voltage Battery with Low State of Charge Disallows
Air Conditioner
Vehicle Type:

Cayenne S E-Hybrid (92A), Panamera S E-Hybrid (970)

Model Year:

2015 - 2017

92A, 970
1705
8734

8

Binder - Advanced Technical Information

Customer Concern: The customer reports that the air conditioning does not function as expected. The blower circulates
warm, unconditioned air. The customer often observes this behavior at the beginning of a drive cycle,
after the vehicle has been shutoff for more than a few minutes. The customer also may not have the
habit of charging the high voltage battery regularly.
Technical Concern: Porsche designs plug-in hybrid vehicles to protect the health of the high voltage battery. One way the
vehicle does this is by disabling high electrical load features when the high voltage battery has a low
state of charge.
Anytime the high voltage battery state of charge is low, there is a possibility that the vehicle will disallow air conditioner function until the vehicle has recharged the battery to a sufficient level. This is not a
defect.
The driver can monitor the high voltage battery state of charge using the gauges in the instrument
cluster and the PCM. A reading of ‘0%’ or ‘0 bars’ indicates that conditions exist where the vehicle may
soon disallow the air conditioner.
Note: The PIWIS tester shows the high voltage battery state of charge measurement using a
different scale than what the driver sees. When using the PIWIS tester, a reading of 15% is
equivalent to 0% on the instrument cluster.
Also note: The vehicle rarely achieves a state where it disallows the air conditioner. However, this may occur more frequently when the driver parks the vehicle with low high voltage
battery state of charge, especially in hot weather or for a long time without charging.
Service Information: Because this behavior is a purposefully designed characteristic of the hybrid system and is not caused
by a defect, there is no repair. Please encourage the customer to plug in the vehicle regularly and
charge the high voltage battery.
As always, be sure to document the complaint completely in PQIS. For this repair, use the following
coding for the cause:
Cause Location:
Cause Symptom:

87340 Compressor
1611 No function

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options may be unavailable when a car is built. Some vehicles may be shown with non-U.S. equipment. Please ask your authorized Porsche dealer for advice concerning the current availability of options
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AfterSales

August 11, 2017
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