122-A3L7Z-10

Advanced Technical Information
Additional Coolant Pump Fault (P0C4700) Causes MIL
1
Cayenne (92A)
1704 1945
Binder - Advanced Technical Information
Attention:		 Service Personnel
Vehicle Type:		Cayenne PHEV (92A)
Model Year: 		
2015 - 2017
Customer Concern:	The customer observes a Malfunction Indicator Lamp (MIL). (Note: Typically, this MIL is the
only symptom of this issue.)
Technical Concern:
The technician confirms the MIL and notes P0C4700 is present in the high-voltage battery.
Service Information:
			
			
			
In many cases, technicians noted one or more of the following root causes:
a) Corrosion on Ground Pin 6B (See figures 1 and 2.)
b) Corrosion on the connector to the secondary low temperature coolant pump.
c) A bad ground or otherwise unsound wiring.
			The service recommendation is to check the ground, connector, and wiring for corrosion and
circuit continuity. Repair the ground, connector, or wiring as needed. Sometimes, the ground
bolt is painted and not adequately conductive. In this case, clean the ground bolt and eyelet
using a wire brush and sandpaper.
			If the ground, connector, and wiring are acceptable, replace the electric water pump and the
electric water pump relay.
			
As always, be sure to document the repair completely in PQIS.
			
For this repair, please code the “cause” as follows:
			Cause location:		19450 Additional coolant pump
			Cause symptom:
1611 No function
©2017 Porsche Cars North America, Inc.
AfterSales
September 26, 2017
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1
Cayenne (92A)
1945
Advanced Technical Information
1704
Service Information:
(cont’d)
		
				
Figure 1 – Ground Pin 6B
				
Figure 2 – Example of corrosion on ground point
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