R50/53 Power steering pump runs with key on?
#51
03-03-2024 | 01:21 AM
1st Gear
Joined: Dec 2022
Posts: 29
Likes: 5
Relevant to this thread: I recently replaced a failed alternator (rear bearing gone bad) in my '05 MCS.
With the alternator removed, the PS pump runs when the key is in the ignition position (i.e. all electrical accessory operational, but engine off).
With the new alternator installed, the PS pump runs only when the engine runs.
So the PS pump can be fooled into believing the engine is on if there's a problem with the voltage regulator in the alternator.
With the alternator removed, the PS pump runs when the key is in the ignition position (i.e. all electrical accessory operational, but engine off).
With the new alternator installed, the PS pump runs only when the engine runs.
So the PS pump can be fooled into believing the engine is on if there's a problem with the voltage regulator in the alternator.
Really wouldn't have expected to see the behaviour I'm getting with the alternator removed/disconnected
I've just removed my pump again, it's going off for repair, it sounds awful anyway so needs looking at
If I continue to see the same behaviour when refitted then will definitely look at changing the alternator
#52
04-24-2024 | 01:14 PM
1st Gear
Joined: Dec 2022
Posts: 29
Likes: 5
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