TT971205

Tech Tips
TT 97-12-05
2009-2013 Routan – Cluster Warning Lights Coming On,
Windshield Wipers Will Not Turn Off, and/or Headlights Will
Not Shut Off
Date: September 14, 2012
May 10, 2013: Update to Information.
Customer concerns of all cluster warning lights coming on, windshield wipers not turning off, headlights not
shutting off may be caused by an interior high speed (IHS) CAN bus concern. Check the following before
continuing with normal diagnosis. See TT 97-12-04 for more information about diagnosing CAN bus
concerns.
Note:
If communication is not possible on CAN IHS bus, windshield wipers and headlamps will default to “ON”.
1)
Check the third row VES3 screen connections. Check that the gray connector is fully seated
at VES3 module. Check other connectors at VES3 are full seated as well. Check for
terminal push out and spread terminals in connectors.
2)
If no concerns are noted with VES3 connectors, ensure the TIPM connectors are fully
seated and locked into TIPM. Check for terminal push out and spread terminals in
connectors at TIPM.
3)
Monitor the interior modules topology with the scan tool while moving the harnesses at the
B- pillar sliding door track. Look for a drop out and or change with the bus communication
while moving these harness locations.
4)
If the vehicle has a FSM (3rd row folding seat module), check the connector at the lower
seat back area for any connector connection issues. Loose connections in this area have
been noted to cause excessive bus noise corrupting IHS bus communication.
© 2013 Volkswagen Group of America, Inc.
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