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Discovery 3/LR3 - Transmission Warning Lamp On
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Member Since: 09 Jun 2005
Location: Ubique
Posts: 16534

United Kingdom 2007 Discovery 3 TDV6 HSE Manual Zermatt SilverDiscovery 3
Discovery 3/LR3 - Transmission Warning Lamp On

TSB No. LA308-001 Issued 17/2/06
"A customer may report a concern of intermittent multiple warning lamp illumination, possibly including the hill descent control (HDC), anti-lock braking (ABS), dynamic stability control (DSC), transmission warning lamp or the "Special Programs Off" message is displayed. Investigation using diagnostic equipment reveals the diagnostic trouble code (DTC), P186D - transfer case clutch stuck, has been logged at random infrequent intervals.

Cause: When the ignition is turned on, the transfer box clutch actuator is operated through its normal range of travel to detect its relative position. If a low voltage occurs during this process, the clutch motor will stop before the end of its full range. When the voltage returns, the process begins with the motor starting from the stopped position rather than the beginning of its range. The motor will drive from the stopped position and reach an unexpected early end of range. The motor will then stall on the end stop and log the above DTC. Non-software related problems leading to the above problem, will result in permanent warning lamp illumination and a DTC logged at every ignition cycle.
Action: Should a customer express concern regarding the above, refer to the Service Procedure detailed in this bulletin to update the control module software."
  
Post #4321320th Feb 2006 2:06 pm
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