Odd noise at engine start-up?
11-16-13, 05:54 AM
#1
Lead Lap
Thread Starter
Odd noise at engine start-up?
Our "new" 2010 RX is our second Lexus with fobs & push-button start. When I push the start button to start the engine, I first hear a one-second "BZZT" noise from behind the instrument cluster, then the engine starts. This happens every time I start the engine, but I've never heard a noise like that in our 2008 ES350. So I wonder if this is normal? Does anyone else hear this odd buzz noise just before your engine fires up?
11-17-13, 04:35 AM
#4
Lead Lap
Thread Starter
11-18-13, 09:37 AM
#6
Lead Lap
Sounds like a relay coil/contacts chattering. Not present on our RX but present on our Accord.
No real worries other than the minor noise.
Might be an easy fix if you knew just where the relay was & could reach it without too much dis-assembly. My bet it's a <$25.00 part.
Coil needs a solid 12V to pull the contacts in, works just like an electric solenoid.
Pitted contacts will cause chatter, dirt/dust between the contacts will cause chatter, low voltage <12V may also cause the chatter.
What condition is your battery in ?? Original to the car ??
No real worries other than the minor noise.
Might be an easy fix if you knew just where the relay was & could reach it without too much dis-assembly. My bet it's a <$25.00 part.
Coil needs a solid 12V to pull the contacts in, works just like an electric solenoid.
Pitted contacts will cause chatter, dirt/dust between the contacts will cause chatter, low voltage <12V may also cause the chatter.
What condition is your battery in ?? Original to the car ??
Last edited by SteveCraig; 11-18-13 at 09:42 AM. Reason: sp.
11-18-13, 10:55 AM
#7
Lead Lap
Thread Starter
Sounds like a relay coil/contacts chattering. Not present on our RX but present on our Accord.
No real worries other than the minor noise.
Might be an easy fix if you knew just where the relay was & could reach it without too much dis-assembly. My bet it's a <$25.00 part.
Coil needs a solid 12V to pull the contacts in, works just like an electric solenoid.
Pitted contacts will cause chatter, dirt/dust between the contacts will cause chatter, low voltage <12V may also cause the chatter.
What condition is your battery in ?? Original to the car ??
No real worries other than the minor noise.
Might be an easy fix if you knew just where the relay was & could reach it without too much dis-assembly. My bet it's a <$25.00 part.
Coil needs a solid 12V to pull the contacts in, works just like an electric solenoid.
Pitted contacts will cause chatter, dirt/dust between the contacts will cause chatter, low voltage <12V may also cause the chatter.
What condition is your battery in ?? Original to the car ??
Battery appears original, but the RX spent the first 3 years in Arizona, & that heat can trash a battery quicker than cold.
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