Fix of The Week 03/05/19

Fix of the week

 

Fix of The Week

Every week we’re posting our favorite head-scratchers and interesting mechanical issues submitted by our Direct-Hit customers.

For a chance to have something you’ve worked on appear as a Fix of the Week, and win a cool little prize for your shop, all you have to do is post your unique fixes in Direct-Hit. Just look up the vehicle you’re working on, click on Post Fix at the top right, then tell us the problem and what you did to fix it.

This Week’s Winners

On this edition of Fix of The Week: a clicking purge valve in a Hyundai, an inoperable hatch in a Lexus, and a shorted out horn in a Honda.

 

2016 Hyundai Tuscon – AutoCare Plus

When scanned, this vehicle showed code P0441—incorrect purge flow. The purge valve, when commanded on with scan tool, could be heard audibly clicking and during engine idle valve would sound like it was working as well. We put a vacuum gauge on the valve purge line side and watched the live data on the scan tool.

The purge valve first turned on at 5% duty cycle but the vacuum gauge wouldn’t show any flow, so we replaced the purge valve and reinstalled the vacuum gauge. When 5% duty cycle fist came on again, the vacuum gauge then showed flow. Even though the valve sounded like it was clicking, it wouldn’t produce any flow. Replacing the purge solenoid took care of the issue.

 

2010 Lexus RX350 – McDonald Auto Repair

This vehicle’s tailgate wouldn’t operate with the remote and had to be opened and closed manually. Close command from the up position would only result in the chime sounding with no initiation. We didn’t have access to software to check switches, so we took a guess and replaced the hatch struts since they were weak and not fully opening the hatch. The new struts allowed the tailgate to reach the full open position, allowing for proper operation. The hatch then worked normally with the remote.

 

1999 Honda CR-V – Ivy Truman Automotive

The customer complained that the shifter was stuck and the car couldn’t be shifted out of park. We also noticed the brake lights were not working. We found no power going into the brake light switch terminal 4 (WHT/GRN). Power is supplied to the brake light switch through 15amp STOP/HORN Fuse #52 (in the underhood fuse box) and it was blown. We put a 15amp fused current loop with an amp clamp in place to observe the amp draw on the circuit.

Everything worked as expected; the amp draw was low and looked completely acceptable while operating the brake switch and the shift interlock. However, when operating the horn, the amperage would shoot straight up and the 15a fuse would blow. We unplugged the horns (located behind the front grill and in front of the radiator) one at a time to find which one was shorting out. We replaced the rusted shorted out horn, fuse #52, and all was good.

 

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