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1998 C70 alarm/level sensor

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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Racerxc70
Posts: 18
Joined: 2 July 2015
Year and Model: C70 1998 coupe
Location: USA Sacramento Ca.
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1998 C70 alarm/level sensor

Post by Racerxc70 »

Does anyone have any experience with this system, how it works,how to turn it on/off, how to program it, does it need to be programmed.
Thanks in advance

Ozark Lee
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Post by Ozark Lee »

Are you asking about the coolant level sensor? There are many alarms on the car so a bit more specificity would be helpful.

If it is the coolant level then there is no programming. There is a magnetic float switch plugged into the bottom of the coolant overflow tank and a float inside of the tank that triggers it. Sometimes the float itself gets stuck and just smacking the tank with the palm of your hand will free it up. If the float is free and the harness is plugged in then about all it can be is a bad switch. The switch just snaps into the bottom of the tank and it is very easy to change.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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Clemens
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Post by Clemens »

I think he´s rather asking about the antitheft alarm which might have a level sensor (that goes off if you try to push the car on a towtruck or lift it up into the air).
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

Racerxc70
Posts: 18
Joined: 2 July 2015
Year and Model: C70 1998 coupe
Location: USA Sacramento Ca.
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Post by Racerxc70 »

Yes I am speaking about the anti theft device, sorry

benpineapple
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Post by benpineapple »

Is there a specific issue you are experiencing with it?

I had an issue for a time where I would unlock my 98 V70, and the "silent alarm" would go off, disabling the starter. Fault was traced to the lock button on a bad master window switch. Remedy (when silent alarm as active) was to unplug the lock button from the switch, close the door, and lock/unlock it with the key in the door. A fob would have worked I'm sure, but I don't have one.
2006 V50 T5 [190,xxxM]
2013 XC90 FWD [80,xxxM]

2001 V70 X/C AWD [sold at 120xxxM],1998 V70 AWD [RIP at 249,255M], 1990 240 [SOLD at 220xxxM]

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BEJinFbk
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Post by BEJinFbk »

Racerxc70 wrote:Does anyone have any experience with this system, how it works,how to turn it on/off, how to program it, does it need to be programmed.
Thanks in advance
Are you sure that you have that optional sensor?
They seem pretty rare in the US.
'98 V70 R - Well Equipped for Life Up North... ;)

benpineapple
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Post by benpineapple »

BEJinFbk wrote:They seem pretty rare in the US.
My 98 V70 has it too. That's 2/100,000 confirmed.
2006 V50 T5 [190,xxxM]
2013 XC90 FWD [80,xxxM]

2001 V70 X/C AWD [sold at 120xxxM],1998 V70 AWD [RIP at 249,255M], 1990 240 [SOLD at 220xxxM]

Racerxc70
Posts: 18
Joined: 2 July 2015
Year and Model: C70 1998 coupe
Location: USA Sacramento Ca.
Contact:

Post by Racerxc70 »

Yes I have it, the car had every anti theft device available when I bought it in 1998, this one in particular needed to be disabled if it was traveling on a ferry or boat, (it never has) it's located in the trunk on the right side behind a panel,it's a white plastic box with some sort of liquid in it attached to a bracket there is no problem with it that I know of but somehow in the last 18 years the electrical connector was unplugged or never plugged in I just don't know,( maybe it was pissing off the mechanic during a service) I just found out last month while cleaning out the trunk, and before I reconnect it, I want to know more about it.

Racerxc70
Posts: 18
Joined: 2 July 2015
Year and Model: C70 1998 coupe
Location: USA Sacramento Ca.
Contact:

Post by Racerxc70 »

BTW the car color is Saffron metallic ( code 435 ) and it is fully loaded, moonroof,901 surround sound audio,4 speed auto trans, 2.3 liter HP turbo (upgraded CPU to add 50 hp) the works.
Thank you for all your comments so far

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Clemens
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Post by Clemens »

So you got 50 hp just from an ECU ugrade?
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

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