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17th December 2023, 03:56 | #1 |
Regular poster
Rover 75 saloon Join Date: Mar 2014
Location: Brisbane
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LSM emergency mode
Hi folks
I think my car has gone into LSM emergency mode and the fact that the low beams come on when I start the car. Well, the one that is working. Also, the blinkers are sort of working I can change the bulbs still doesn't work, try this on two of the blinkers. When you turn the ignition on the trip media shows actual kilometres since last reset, but soon as you start the car. The word error comes up in the place of the kilometres' Can anybody please tell me how to reset so my headlights and blinkers and trip meter work again? This is what the workshop manual says about the LSM emergency mode In the event of an LSM failure, the lighting system still needs to be driven for safety purposes. Independent hardware is fitted to Rover 75 and is activated in the event of a LSM failure with the ignition in position 2. The emergency operation is held off by a functional LSM which supplies cycling signal to a monoflop which controls the emergency system. The LSM processor provides the cycling signal and it must operate at a minimum of 15Hz to prevent activation of the emergency system. If this signal is not present or falls below 15Hz the monoflop enters its stable state and activates the emergency back up system. When the emergency system is activated, the dipped beam and the tail lamps are switched on regardless of the position of the master light switch. Also, the brake lamps will operate as normal when selected. All other functions controlled by the LSM will not operate. Emergency operation will also be activated when the vehicle battery terminal voltage is very low (i.e. less than 6V at the LSM) and the ignition is in position 2. Be excellent to each other. Damien |
17th December 2023, 09:03 | #2 |
This is my second home
Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009
Location: Hampshire
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From the symptoms you describe it sounds like you need a new LSM. Have you had it apart to check for water/other damage?
You can plug in another LSM just to check if that cures the fault. |
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