Electrical and Coolant leak Issues with 2009 3.2L XC90
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Electrical and Coolant leak Issues with 2009 3.2L XC90
At the end of my rope with this car. But none of the mechanics near me want to work on this can anyone tell me what or where the issue could be.
Starting we’ve had major electrical problems with this car where it would just die completely and drain the batter to replacement twice. This was after sitting for a few days.
Most recently my key fob just stopped working and tried changing battery no luck.
Now I’ve got a coolant leak and no idea what caused it or where it’s come from. The leak appears to be on the front passenger side at the front of the engine bay and I do not think it’s the radiator but it could be.
Could anyone tell if you’ve experienced anything similar or if these problems are related and what may have caused this.
TL
R electrical and coolant issues. Please help. Not sure if this is the right forum but I could really use any help and any ideas.
Starting we’ve had major electrical problems with this car where it would just die completely and drain the batter to replacement twice. This was after sitting for a few days.
Most recently my key fob just stopped working and tried changing battery no luck.
Now I’ve got a coolant leak and no idea what caused it or where it’s come from. The leak appears to be on the front passenger side at the front of the engine bay and I do not think it’s the radiator but it could be.
Could anyone tell if you’ve experienced anything similar or if these problems are related and what may have caused this.
TL
R electrical and coolant issues. Please help. Not sure if this is the right forum but I could really use any help and any ideas.
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Joined: Mar 2012
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From: Burlington, VT
ok so you have two totally separate issues here.
For the electrical issues, I'd start by doing some probing with a current meter to look for possible sources a of current drain. First check for any blown fuses. Next, with the key off, measure the current draw on the battery cable - I'd expect something in the 20 mA range (ie required to keep electronics alive, the clock etc). This is where you'd want to use a clamp on loop current meter tool If its over say 25 or 30 mA, start pulling fuses out to see if you can isolate the circuit drawing the current. next you can test or pull relays to see if any of those are staying energized. If nothing shows up then you may have a short circuit in a device or a wiring issue so look for bad ground points, melted insulation etc. Tedious yes but this is something you can do at home with a low cost tool and some patience. I'd also google around to find a wiring diagram specific to your model.
For the coolant leak, the common suspects are the upper and lower radiator hoses, the hoses to/from the overflow tank, the overflow tank itself, the radiator seams, the hoses to the heater core, heater core o-rings and the heater core itself. SInce you noted the drip is front passenger side, I'd suspect its either the hoses going to the overflow reservoir or the reservoir itself. On the older S40s, a common fail point is where the coolant reservoir hose meets the upper radiator hose. A shop can do a simple pressure test to help find the leak.
For the electrical issues, I'd start by doing some probing with a current meter to look for possible sources a of current drain. First check for any blown fuses. Next, with the key off, measure the current draw on the battery cable - I'd expect something in the 20 mA range (ie required to keep electronics alive, the clock etc). This is where you'd want to use a clamp on loop current meter tool If its over say 25 or 30 mA, start pulling fuses out to see if you can isolate the circuit drawing the current. next you can test or pull relays to see if any of those are staying energized. If nothing shows up then you may have a short circuit in a device or a wiring issue so look for bad ground points, melted insulation etc. Tedious yes but this is something you can do at home with a low cost tool and some patience. I'd also google around to find a wiring diagram specific to your model.
For the coolant leak, the common suspects are the upper and lower radiator hoses, the hoses to/from the overflow tank, the overflow tank itself, the radiator seams, the hoses to the heater core, heater core o-rings and the heater core itself. SInce you noted the drip is front passenger side, I'd suspect its either the hoses going to the overflow reservoir or the reservoir itself. On the older S40s, a common fail point is where the coolant reservoir hose meets the upper radiator hose. A shop can do a simple pressure test to help find the leak.
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Junior Member
Joined: Apr 2023
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ok so you have two totally separate issues here.
For the electrical issues, I'd start by doing some probing with a current meter to look for possible sources a of current drain. First check for any blown fuses. Next, with the key off, measure the current draw on the battery cable - I'd expect something in the 20 mA range (ie required to keep electronics alive, the clock etc). This is where you'd want to use a clamp on loop current meter tool If its over say 25 or 30 mA, start pulling fuses out to see if you can isolate the circuit drawing the current. next you can test or pull relays to see if any of those are staying energized. If nothing shows up then you may have a short circuit in a device or a wiring issue so look for bad ground points, melted insulation etc. Tedious yes but this is something you can do at home with a low cost tool and some patience. I'd also google around to find a wiring diagram specific to your model.
For the coolant leak, the common suspects are the upper and lower radiator hoses, the hoses to/from the overflow tank, the overflow tank itself, the radiator seams, the hoses to the heater core, heater core o-rings and the heater core itself. SInce you noted the drip is front passenger side, I'd suspect it either the hoses going to the overflow reservoir or the reservoir itself. On the older S40s, a common fail point is where the coolant reservoir hose meets the upper radiator hose. A shop can do a simple pressure test to help find the leak.
For the electrical issues, I'd start by doing some probing with a current meter to look for possible sources a of current drain. First check for any blown fuses. Next, with the key off, measure the current draw on the battery cable - I'd expect something in the 20 mA range (ie required to keep electronics alive, the clock etc). This is where you'd want to use a clamp on loop current meter tool If its over say 25 or 30 mA, start pulling fuses out to see if you can isolate the circuit drawing the current. next you can test or pull relays to see if any of those are staying energized. If nothing shows up then you may have a short circuit in a device or a wiring issue so look for bad ground points, melted insulation etc. Tedious yes but this is something you can do at home with a low cost tool and some patience. I'd also google around to find a wiring diagram specific to your model.
For the coolant leak, the common suspects are the upper and lower radiator hoses, the hoses to/from the overflow tank, the overflow tank itself, the radiator seams, the hoses to the heater core, heater core o-rings and the heater core itself. SInce you noted the drip is front passenger side, I'd suspect it either the hoses going to the overflow reservoir or the reservoir itself. On the older S40s, a common fail point is where the coolant reservoir hose meets the upper radiator hose. A shop can do a simple pressure test to help find the leak.
thank you so much!!! I greatly appreciate the advice I’m buying a current meter tool tomorrow and I will start there !!
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