No crank, no start

2006 LEXUS RX 350

156,345 MILES • 6 CYL • 2WD • AUTOMATIC

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Hello, the vehicle sometime would not give a sign of cranking, I checked the voltage or power source on the solenoid, there was none while cranking but sometimes there will be power. With the ignition switch in "on" position, I use wire to connect Power from the battery to the solenoid, the vehicle start. Please could you help me with the cranking circuit diagram?

Oct 23, 2020 at 6:26 PM

JACOBANDNICKOLAS

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Hi,

If you get power sometimes and not others to the S terminal on the starter, chances are the starter relay is failing. Here is a link that shows how to test a relay:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

If you look at pic 1 below, it is a portion of the starting system wiring schematic. I highlighted the relay and its location. Pic 2 shows the relay's position in the relay box.

This is where I would start.

Let me know what you find.

Joe

Images (Click to enlarge)

Oct 23, 2020 at 8:30 PM

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Thank you, but for the first diagram you didn't add the top. Please add it.

Oct 26, 2020 at 8:14 PM

JACOBANDNICKOLAS

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Here is the entire starting system schematic. Please note this is for an 2007 RX350. I am showing nothing for an 2006. Since these were introduced in 2006, I suspect it was a late production.

I hope this helps.

Joe

Images (Click to enlarge)

Oct 27, 2020 at 2:25 PM

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Thank you.

Oct 28, 2020 at 7:15 AM

JACOBANDNICKOLAS

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Hi,

You are very welcome. Please remember, the schematics came from a 2007 manual.

Take care,
Joe

Oct 28, 2020 at 6:03 PM

BLESSING EWOBOR

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Okay sir, thank you.

Oct 28, 2020 at 8:41 PM