HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedometer

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Reaccion
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HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedometer

Post by Reaccion » Sun Sep 26, 2021 2:41 pm

Hi guys! I have a big problem with my 2003 Pontiac Vibe AWD Automatic transmission with ABS. When I first startup the vehicle, the ABS and Brake warning lights stay on and the speedometer does not work. The Vibe would not shift into second gear. After the vehicle moves for about 20 meters, the warning lights (ABS + Brake) turn off and when they turn off, the speedometer start working again and the Vibe starts shifting gears normally. The lights do not turn back on until I turn off the car. When I turn it back on, the same warning lights and no speed / no shifting gear pattern again.

I retrieved the ABS codes and I got 31, 32, 41. I changes both front Left & Right ABS sensors. I reset the lights but I still get the same waring lights, no speedo problem and no gear shifting. Please HELPPPPP!!!
Last edited by Reaccion on Sat Oct 16, 2021 1:14 am, edited 1 time in total.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sun Sep 26, 2021 4:17 pm

Apparently Code 41 is low voltage. Have you tried diagnosing that?

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Mon Sep 27, 2021 2:52 pm

andrewclaus wrote:
Sun Sep 26, 2021 4:17 pm
Apparently Code 41 is low voltage. Have you tried diagnosing that?
Thanks for replying. Where would I have to check the voltage? At the sensor?

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Mon Sep 27, 2021 3:43 pm

This is what I found:

ABS Codes 31 and 32:

DTC Detecting Condition
Detection of any of conditions (1) through (3):
(1) At vehicle speed of 10 km/h (6 mph) or more, pulses are
not input for 15 sec.
(2) Momentary interruption of the vehicle speed sensor signal
occurs at least 7 times in the time between switching the ignition switch ON and switching it OFF.
(3) Abnormal fluctuation of speed sensor signals with the vehicle speed 20 km/h (12 mph) or more.

Trouble Area
Right front, left front speed sensor
Open or short in each speed sensor circuit
Sensor rotor

ABS Code 41:

Low Battery Positive Voltage or Abnormally High Battery Positive Voltage

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Tue Sep 28, 2021 4:00 am

Low voltage could be anything from a battery or charging problem to a loose wire in the system.

I'd track that down first. The other codes could be a result of low voltage.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sun Oct 03, 2021 4:43 am

andrewclaus wrote:
Tue Sep 28, 2021 4:00 am
Low voltage could be anything from a battery or charging problem to a loose wire in the system.

I'd track that down first. The other codes could be a result of low voltage.
The battery voltage is fine and the alternator as well.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sun Oct 03, 2021 5:00 am

I had the Vibe tested with an ABS scan tool instead of the jumper wire / flashing light procedure.
Even thought the ABS and the BRAKE lights were on, the ABS scan tool did not find any ABS fault errors.
Surprisingly, even though the ABS scan tool did not find any errors, the scan tool could erase the ABS and BRAKE lights which will come right back on after turning the ignition off and back on.

Any ideas guys??
Last edited by Reaccion on Sun Oct 10, 2021 4:18 am, edited 1 time in total.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sun Oct 03, 2021 1:36 pm

The voltage Code 41 voltage problem could be a loose/broken wire or pin at the ABS computer or anywhere in the ABS system. That will take probing around with a wiring diagram and voltmeter to check.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Mon Oct 04, 2021 1:46 pm

andrewclaus wrote:
Sun Oct 03, 2021 1:36 pm
The voltage Code 41 voltage problem could be a loose/broken wire or pin at the ABS computer or anywhere in the ABS system. That will take probing around with a wiring diagram and voltmeter to check.
Thanks for replying. I will check the wiring, especially by the front right ABS sensor. I will post back

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 09, 2021 7:48 am

I measure the voltage at the plug that connects to the sensor and it is 7.5Volts. I think that the voltage should be 12V. Could you let me know what to do next? Thanks

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sat Oct 09, 2021 10:05 am

The sensor might normally have lower voltage, 5 V or so, depending on the type of sensor.

Check the supply voltage at the ABS actuator, to verify the computer is getting battery voltage.

I'll try adding a file of the wiring diagram that shows where to check voltage on page 3.
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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sun Oct 10, 2021 3:59 am

Thank you for all your replies. I noticed that I did not explain myself correctly, I meant to say that the voltage at the wire harness that comes from the ECU to the sensor is 7.5V. I unplugged the ABS sensor from the harness. And with the Ignition key in the ON position, I measured the harness voltage not the sensor.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 12:07 am

I measured the voltage at the ABS module and it is 12 Volts. Any other suggestions?

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 1:17 am

Also, I forgot to mention that when the ABS and Brake lights are one, besides the speedometer not working, the transmission won't shift gears until moving for about 20 meters and the ABS Brake lights are off.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sat Oct 16, 2021 5:15 am

Is the check engine light also on? Have also you checked for diagnostic codes using the OBD-II port? It sounds like the vehicle speed sensor isn't working, but that would definitely give a code.

Also, did you check ground continuity from the ABS module?

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 5:25 am

andrewclaus wrote:
Sat Oct 16, 2021 5:15 am
Is the check engine light also on? Have also you checked for diagnostic codes using the OBD-II port? It sounds like the vehicle speed sensor isn't working, but that would definitely give a code.

Also, did you check ground continuity from the ABS module?
I remember that I got the P0500 code a couple years ago. But it went away on its on. Now, there is no check engine light.

The ground continuity at the ABS module is fine as well.

I also that there are not pins pushed out in the Module plug.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 5:30 am

I am looking into the speed sensor. But I can not find the exact location for the 2003 Vibe AWD automatic transmission.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sat Oct 16, 2021 5:59 am

Reaccion wrote:
Sat Oct 16, 2021 5:30 am
I am looking into the speed sensor. But I can not find the exact location for the 2003 Vibe AWD automatic transmission.
It's the rearmost of two sensors on top of the transmission housing. The other one on top is the back-up lamp switch.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 12:35 pm

Hey, I am attaching a picture of the transmission so that you could see the red circle to confirm the VSS location.
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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Sat Oct 16, 2021 6:46 pm

I was searching online and it looks like the AWD Speed Sensor looks like the ABS sensor at the wheel hubs. Very different from the FWD one. Please check the picture and confirm.
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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sat Oct 16, 2021 6:53 pm

I think that's the neutral safety switch. The VSS will be toward the rear, right above the shaft output.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Sat Oct 16, 2021 6:57 pm

I use this website to find the Toyota part numbers: http://www.japan-parts.eu/toyota/us/200 ... _005_/body. You'll have to input the year and Matrix characteristics equivalent to your Vibe. It's a little hard to navigate at first but it's a powerful tool.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Mon Oct 18, 2021 1:15 pm

Hey, please check this picture where it shows the location of the VSS. Please confirm.
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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Mon Oct 18, 2021 2:05 pm

I missed in your OP that you have AWD. Make sure that diagram is for AWD. As you noted above, they're different parts. There may be different wiring as well.

On my base model 2007, that diagram is roughly correct. It's more behind the engine, near the exhaust manifold.

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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by Reaccion » Mon Oct 18, 2021 3:10 pm

Yes, my 2003 is AWD. I found the VSS exactly where the V2 is pointing to.

Would it make sense that the VSS is bad even thought the check engine light is not on? But usually the ABS and Brake lights are on, the speeedometer does not work and the transmission does not shift until the lights turn off.
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Re: HELP: 2003 Pontiac Vibe ABS + Brake Lights Speedometer After 20 Meters Warning Lights Turns Off & Working Speedomete

Post by andrewclaus » Tue Oct 19, 2021 4:57 am

No, it doesn't make sense that the check engine light is not on. Have you verified the light works? It should come on with the key switch in ignition mode.

It also doesn't make sense that the speedometer isn't working with the ABS problems indicated.

You mentioned a previous VSS code so it's suspect. Replacement labor should be minimal. You can decide if the part cost is worth the gamble. Have you looked for a bench test procedure for the sensor?

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