PSM light on after approximately a 2 second battery disconnect

[epirok1]

Well to avoid problems this spring I purchased a battery tender and after I installed it my PSM light is on. Have I won myself a trip to the dealer? How ironic that I purchased a battery tender so I would not have any troubles next spring. Any help would be appreciated. Perhaps I just need to drive it a bit to reset something??

2005

C2S

[dphatch]

Well to avoid problems this spring I purchased a battery tender and after I installed it my PSM light is on. Have I won myself a trip to the dealer? How ironic that I purchased a battery tender so I would not have any troubles next spring. Any help would be appreciated. Perhaps I just need to drive it a bit to reset something??

2005

C2S

If you haven't already done it, drive it for awhile and the light should go out. If not, double check that your connections are clean and tight. (Don't over do it just make sure they are snug. Should not be able to move the terminal end if it's connected properly) I have disconnected the battery several times and if I had the PSM light come on it didn't last long enough for me to remember it. Also had a similar set up with a battery tender so I don't think that's the issue unless you're getting current loss from a loose connection or a poor connection caused by a dirty or oxidized battery terminal.

Make sure you always disconnect negative terminal first ( if you just need to cut power to the car ) and reconnect it last (if you're also disconnecting the positive terminal).

[epirok1]

Thanks!!

Well to avoid problems this spring I purchased a battery tender and after I installed it my PSM light is on. Have I won myself a trip to the dealer? How ironic that I purchased a battery tender so I would not have any troubles next spring. Any help would be appreciated. Perhaps I just need to drive it a bit to reset something??

2005

C2S

If you haven't already done it, drive it for awhile and the light should go out. If not, double check that your connections are clean and tight. (Don't over do it just make sure they are snug. Should not be able to move the terminal end if it's connected properly) I have disconnected the battery several times and if I had the PSM light come on it didn't last long enough for me to remember it. Also had a similar set up with a battery tender so I don't think that's the issue unless you're getting current loss from a loose connection or a poor connection caused by a dirty or oxidized battery terminal.

Make sure you always disconnect negative terminal first ( if you just need to cut power to the car ) and reconnect it last (if you're also disconnecting the positive terminal).

[wwest]

Well to avoid problems this spring I purchased a battery tender and after I installed it my PSM light is on. Have I won myself a trip to the dealer? How ironic that I purchased a battery tender so I would not have any troubles next spring. Any help would be appreciated. Perhaps I just need to drive it a bit to reset something??

2005

C2S

If you haven't already done it, drive it for awhile and the light should go out. If not, double check that your connections are clean and tight. (Don't over do it just make sure they are snug. Should not be able to move the terminal end if it's connected properly) I have disconnected the battery several times and if I had the PSM light come on it didn't last long enough for me to remember it. Also had a similar set up with a battery tender so I don't think that's the issue unless you're getting current loss from a loose connection or a poor connection caused by a dirty or oxidized battery terminal.

Make sure you always disconnect negative terminal first ( if you just need to cut power to the car ) and reconnect it last (if you're also disconnecting the positive terminal).

The ABS pumpmotor is used to "replenish" brake fluid pressure as/when it is used up via PSM activation. The pumpmotor is relatively small for such a BIG job and therefore draws a "ton" of current from the 12 volt system when it (rarely) has to run. So if the system detects a low battery, even only slightly low, it will reserve pumpmotor operation for ABS only. You can correct the system fault, provided your battery is full charged, by disconnecting the battery entirely for 10 minutes or so.

That 2 second battery disconnect was only/just long enough for the ABS/PSM system to detect a "low" battery.