Check Tire Pressure
05-11-2004, 12:19 PM
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Check Tire Pressure
Ok....havn't been driving my car much since I cracked the two ribs...but yesterday i tried...keep getting this same stupid error. It tells me to check my tire pressure because it'* low, so i check it, and they are all NORMAL!! wtf? could that be from the new spring?
05-11-2004, 01:22 PM
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Originally Posted by MarkFahey
With the tire pressure message displayed on your DIC, hit reset.
05-11-2004, 01:42 PM
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Better question.. where is the sensor and wires located for the tire pressure sensor? I would like to troubleshoot from there.. and what would be the ohms / resistance reading if it was working correctly ( I will do the volt and continuaty check also )
05-11-2004, 02:18 PM
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I'm pretty sure this is the VSS sensor attached to the hub. The dic message will activate if any of the 4 tires is pressure different by 5 psi. The computer calculates this by seeing how fast each of the tires spin. A psi change of -/+ 5 psi can be determined by rotational differences. Have your ABS lights come on at all? Could be a bad VSS which would mean you have to change the offending wheel hub as well.
05-11-2004, 02:47 PM
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This is a stupid question, but have you gone to the tire pressure display on your DIC and held the reset button until it changes to Tire Pressure Normal? If you just hit reset when the message appears (changes from say your average mileage to check tire pressure), then you just suppress the message and the next key on or like 20 minutes of driving will activate it again. You need to hold the reset button at the tire pressure display on the DIC to reset the tire pressures.
Again, sorry if you have already done this, but I thought I would throw in my experience.
Again, sorry if you have already done this, but I thought I would throw in my experience.
05-11-2004, 02:50 PM
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Originally Posted by Tamara
Originally Posted by MarkFahey
With the tire pressure message displayed on your DIC, hit reset.
05-11-2004, 09:13 PM
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Well done guys, two valid points here.
First are you resetting it correctly? Does the message come up after you start the car but your still in park?
It is the wheel sensors that are used to monitor the tire pressure.
First are you resetting it correctly? Does the message come up after you start the car but your still in park?
It is the wheel sensors that are used to monitor the tire pressure.
The tire inflation monitor (TIM) system uses the EBCM, wheel speed sensors, class 2 serial data messages, and instrument cluster in order to perform the system functions.
The EBCM contains the software to perform the system monitoring functions. The EBCM uses wheel speed data obtained from the wheel speed sensors to detect relative pressure differences. Any ABS/TCS system activity causes the EBCM to temporarily suspend the tire inflation monitor system functions.
Conditions for Running the DTC
The vehicle speed is between 24-145 km/h (15-90 mph).
Conditions for Setting the DTC
One of the following conditions occur:
The EBCM detects a tire pressure difference of 69 kPa (10 psi).
The EBCM sets a DTC C1254.
Loss of battery positive voltage (B+) at the EBCM.
A battery disconnect or a low battery voltage condition.
Actions Taken When the DTC Sets
With UB3, the systems monitor TIRE PRESS indicator turns ON.
With U50 or U2F, the DIC displays the CHECK TIRE PRESSURE message.
Conditions for Clearing the DTC
The condition for the DTC is no longer present (the DTC is not current) and you performed the tire inflation monitoring reset function.
The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
Any of the following conditions can cause this DTC.
One or more of the vehicle'* tires is under inflated.
One or more of the vehicle'* tires is over inflated.
The tire pressures have been altered without resetting the TIM.
The tires have been rotated or changed without resetting the TIM.
The tires are different in size than the original equipment manufacturer'*.
Rough or slippery road conditions (dirt, gravel, wet, snow, or ice).
The tires are out of balance.
Loss of battery positive voltage (B+) at the EBCM.
A battery disconnect or a low battery voltage condition.
Water intrusion into a wheel speed sensor connector.
A suspension condition (i.e. the vehicle is out of alignment).
The EBCM contains the software to perform the system monitoring functions. The EBCM uses wheel speed data obtained from the wheel speed sensors to detect relative pressure differences. Any ABS/TCS system activity causes the EBCM to temporarily suspend the tire inflation monitor system functions.
Conditions for Running the DTC
The vehicle speed is between 24-145 km/h (15-90 mph).
Conditions for Setting the DTC
One of the following conditions occur:
The EBCM detects a tire pressure difference of 69 kPa (10 psi).
The EBCM sets a DTC C1254.
Loss of battery positive voltage (B+) at the EBCM.
A battery disconnect or a low battery voltage condition.
Actions Taken When the DTC Sets
With UB3, the systems monitor TIRE PRESS indicator turns ON.
With U50 or U2F, the DIC displays the CHECK TIRE PRESSURE message.
Conditions for Clearing the DTC
The condition for the DTC is no longer present (the DTC is not current) and you performed the tire inflation monitoring reset function.
The condition for the DTC is no longer present (the DTC is not current) and you used the scan tool Clear DTC function.
The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
Diagnostic Aids
Any of the following conditions can cause this DTC.
One or more of the vehicle'* tires is under inflated.
One or more of the vehicle'* tires is over inflated.
The tire pressures have been altered without resetting the TIM.
The tires have been rotated or changed without resetting the TIM.
The tires are different in size than the original equipment manufacturer'*.
Rough or slippery road conditions (dirt, gravel, wet, snow, or ice).
The tires are out of balance.
Loss of battery positive voltage (B+) at the EBCM.
A battery disconnect or a low battery voltage condition.
Water intrusion into a wheel speed sensor connector.
A suspension condition (i.e. the vehicle is out of alignment).