122-J8L7U-03

1
Cayenne (92A)
Advanced Technical Information
1801
Additional Coolant Pump Fault (P0C4700) Causes MIL
1945
Binder - Advanced Technical Information
This bulletin replaces ATI 1704, published on
September 26, 2017.
Attention:		 Service Personnel
Vehicle Type:		Cayenne PHEV (92A)
Model Year: 		
2015 - 2017
Revision:		 New text was added to ‘Service Information’ on February 8, 2018.
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:	New guided fault finding appears in PIWIS tester version 37.000 and higher. Please follow the
instructions given in this resource before proceeding with the information in this ATI.
			
			
			
			
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
AfterSales
February 8, 2018
Page 1 of 2
1
Cayenne (92A)
1945
Advanced Technical Information
1801
Service Information:
(cont’d)
		
				
Figure 1 – Ground Pin 6B
				
Figure 2 – Example of corrosion on ground point
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.
February 8, 2018
Page 2 of 2
AfterSales
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