Need help with sensor issues on ADD rear bumper

[PeceKeepr]

Firstly please I don’t need negative comments on why I shouldn’t have done it.

Ok so I have a hybrid TRD sport. The rear bumper from ADD didn’t account for this sensor. I think it’s the rear cross traffic detection. Somehow it must be linked to the blind spot monitoring. I’ve moved the sensor at first to the top of the frame using a zip tie and double sided tape and it worked for a few hundred miles. Then I got the notification you see in the picture I’m I have to disable both the rear cross traffic and blind spot monitoring in order to get the message to quit spamming. Once I restart the vehicle it spams until I go back in the dash and turn it off and the cycle repeats endlessly. I did finally move the sensor to the bottom of the frame and unplugged both battery terminals and it worked for a few hundred miles and then the same thing. So I thought maybe I’ll just undo the battery terminals again and it’ll reset it. But no it didn’t. I guess I’m asking for advice on how to fix it or delete it. And if I can permanently turn off the notifications. I’d like to keep the blind spot monitoring but could care less about the cross traffic. But at the end of the day I’ll cut my losses and do without both of them if I can get rid of the notifications. I’m leary of taking it to Toyota and I have thought about going to an off road shop but my experience so far is that they don’t know enough about the 4th gen’s to be able to help. That’s my problem fellows thanks

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[Sagebrush]

Firstly please I don’t need negative comments on why I shouldn’t have done it.

Don't ya love forum trolls?

I'm glad you posted the photos, so I know where my sensors are. Good luck.

 

[EVOTACO]

The "puck" looking piece in your photos is actually a speaker. There is a matching one in the front. They're used for the high pitch tone output during movement under hybrid power.

 

[PeceKeepr]

The "puck" looking piece in your photos is actually a speaker. There is a matching one in the front. They're used for the high pitch tone output during movement under hybrid power.

Seriously?

 

[EVOTACO]

Yup.

Might want to check for any damage to the connections and/or wires to these sensor locations. Is there paint on the LH/RH blind spot sensors at the corner of the bumper?

 

[PeceKeepr]

The "puck" looking piece in your photos is actually a speaker. There is a matching one in the front. They're used for the high pitch tone output during movement under hybrid power.

Im thinking you’re right. After looking into it. It should have nothing to do with my bsm or rear cross traffic problems then correct? And I could fasten it to the top of the frame out of sight again. The directions from ADD said I could lightly spray paint the bsm sensors black to match the bumper since they protrude maybe I should take some mineral spirits or thinner and take that paint off? What do you think about all that? Thanks

 

[EVOTACO]

I can't think of a reason for the speaker to cause issue with the sensors. Were all of the sensors placed back into their original locations? I would not think it matters, but if they are capable of being calibrated, maybe they are sensitive to location.

The images of the ADD bumper, in their instructions, still has the Toyota part markings barely visible so it's definitely a light coat. Since the OEM installed location is going through painted plastic, it may be the type of paint that is causing an issue.

 

[PeceKeepr]

I can't think of a reason for the speaker to cause issue with the sensors. Were all of the sensors placed back into their original locations? I would not think it matters, but if they are capable of being calibrated, maybe they are sensitive to location.

The images of the ADD bumper, in their instructions, still has the Toyota part markings barely visible so it's definitely a light coat. Since the OEM installed location is going through painted plastic, it may be the type of paint that is causing an issue.

The sensors are close to their oem location minus the speaker. I have a light coat and you can still see the Toyota markings on my sensors too. So maybe tomorrow or the a day this upcoming week I’ll take the sensors out clean them of spray paint and reinstall them bare if it’s works maybe the following week I’ll see if they can handle a vinyl wrap in black or talk to my car warp guy and see what we can do. Thanks for the advice I’ll keep you informed on what happens

 

[PeceKeepr]

I can't think of a reason for the speaker to cause issue with the sensors. Were all of the sensors placed back into their original locations? I would not think it matters, but if they are capable of being calibrated, maybe they are sensitive to location.

The images of the ADD bumper, in their instructions, still has the Toyota part markings barely visible so it's definitely a light coat. Since the OEM installed location is going through painted plastic, it may be the type of paint that is causing an issue.

There’s a chance I got the BSM sensors flip flopped from left to right would that make a difference. One of my friends think I should try to flip them around before I try removing the spray paint. What’s your thoughts?

 

[PeceKeepr]

Not the harness but the sensors themselves because I unplugged them when I painted them and didn’t take care to remember left or right

 

[EVOTACO]

There’s a chance I got the BSM sensors flip flopped from left to right would that make a difference. One of my friends think I should try to flip them around before I try removing the spray paint. What’s your thoughts?

Worth a shot. That's more along the lines of what I was thinking when asking if they were returned to their original locations. If you can still see the part marking, you could see if the part number differs between them. At the same time, it couldn't hurt to disconnect each sensor plug and check them for pin damage or foreign debris (disregard if you have already done this).

 

[EVOTACO]

Looking through the ADD rear bumper install instructions, as well as the Toyota ARB rear bumper instructions (I'm actually considering one of these rear bumpers myself), they don't mention anything about a LH or RH BSM sensor. Even looking up the BSM part number 88162-AK020 (superseded by 88162-AK021) does not show a distinction between LH or RH.

Both instructions do however mention specific orientations for the parking sonar sensors, but this is where the instructions differ and appears to be due to connector access.

The ADD instructions have the outer sonar sensor connectors facing outboard, while the inner sensor connectors face down away from the lights towards the centerline of the truck.

The Toyota ARB instructions have both RH sonar sensor connectors facing outboard to the right and the LH sensor connectors facing outboard to the left. The BSMs, on the ARB bumper, are actually installed behind the steel of the bumper (so I don't expect your paint to be the issue).

The Toyota instructions do mention calibrating both the parking sonar and BSM sensors after bumper installation is complete, but I don't remember reading this being done by others who have performed this install.

 

[PeceKeepr]

Looking through the ADD rear bumper install instructions, as well as the Toyota ARB rear bumper instructions (I'm actually considering one of these rear bumpers myself), they don't mention anything about a LH or RH BSM sensor. Even looking up the BSM part number 88162-AK020 (superseded by 88162-AK021) does not show a distinction between LH or RH.

Both instructions do however mention specific orientations for the parking sonar sensors, but this is where the instructions differ and appears to be due to connector access.

The ADD instructions have the outer sonar sensor connectors facing outboard, while the inner sensor connectors face down away from the lights towards the centerline of the truck.

The Toyota ARB instructions have both RH sonar sensor connectors facing outboard to the right and the LH sensor connectors facing outboard to the left. The BSMs, on the ARB bumper, are actually installed behind the steel of the bumper (so I don't expect your paint to be the issue).

The Toyota instructions do mention calibrating both the parking sonar and BSM sensors after bumper installation is complete, but I don't remember reading this being done by others who have performed this install.

I already had quite the problem with the parking sensors and finally got that installed correctly they’re instruction on them were wrong there’s so much there it would take awhile to in pack but the short story is they have you put the sensors back in at an angle with no mention of a top left or right indication how the sensor should sit. Because if you look at the parking sensor you’ll notice it’s angled. And it’s angled after much troubled shooting to account for the downward angle of the bumper. Because when I installed it the way they said it had my truck picking up the ground when I was backing up. But that’s all fixed now.

But on to the BSM when I get some free time this week I’m gonna tackle the bsm issue. I’m thinking it might also be a pinched wire in the harness too so I may have to cut some of the corrugated protector apart and inspect the harness. They also didn’t have much in the way of cable management. And when I got done with the bumper it was 3am so I wasn’t at my best and I just tucked the harness up and it might be pinched in one area

 

[EVOTACO]

Looking at the service manual, there is some information about handling the BSM and errors that can happen.

"If a sensor is moved even slightly off position, the system may malfunction, and vehicles may not be detected correctly."
A DTC will be stored "when the blind spot monitor sensor deviates 5 degrees or more from the horizontal axis when the system is activated. This DTC is stored when the angle of the blind spot monitor sensor (A(LH) or B(RH)) deviates more than the allowable range from the horizontal axis."

Since this is a CAN communication, I could see the swapping of sensor positions possibly causing an error.

 

[PeceKeepr]

So I swapped out the sensors and checked the wire harness for pinched or shorted out wires. I didn’t run a continuity test but I might do that.
So it didn’t work. I’m thinking it’s either the spray paint or the system needs to be calibrated. What’s funny is this morning the system came back on and worked for about 20 miles and then went back off again.

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