When I turn the key to the on the ABS trac relay clicks three times?

NAINOA

MEMBER
1998 TOYOTA 4RUNNER
3.4L
6 CYL
4WD
MANUAL
242,000 MILES

I noticed that when I turn the key to the on the ABS trac relay clicks three times. What’s the reason and I also noticed I don’t have a ECT switch as well could that be the problem with the clicking sound?

Saturday, August 5th, 2023 AT 1:29 AM

5 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,690 POSTS

I would try replacing the relay first and if that does not work the ABS ECU could be shorting out, here is how to swap the relay and the ABS control unit. Also, I would scan the ABS system to see if there are any codes.

https://www.2carpros.com/articles/anti-lock-system-testing-and-repair-abs

Check out the images (below). Please let us know how it goes.

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Saturday, August 5th, 2023 AT 10:56 AM

NAINOA

MEMBER
41 POSTS

Could a P0110 code be also a reason why the relay is clicking when the key is turned to on?

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Saturday, August 5th, 2023 AT 10:59 AM

KEN L

MASTER CERTIFIED MECHANIC
47,690 POSTS

The P0110 code in a 1998 Toyota 4Runner indicates a problem with the Intake Air Temperature (IAT) sensor circuit. The IAT sensor is responsible for measuring the temperature of the air entering the engine. This information is used by the engine control module (ECM) to adjust the air/fuel mixture and ignition timing for optimal performance. So, I would unplug the sensor to see if it affects the relay, but I don't think it will.

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Monday, August 7th, 2023 AT 9:33 AM

KEN L