TPMS Light On

[khpony]

Is there a way to determine which wheel is giving the TPMS warning on the message center?

 

[Bedrck47]

do it the old fashion way use a pressure gauge

 

[Bedrck47]

have you read your owners manual for information on the TPMS operation

 

[khpony]

Thanks but I've read it twice and found no answers. Yes I checked the tire pressures as well.

 

[khpony]

FWIW...all tires are at 35psi in accordance with the door sticker.

 

[Bedrck47]

the following was copied from the 03 ford service manual

Principles of Operation

The tire pressure monitoring system (TPMS) has the ability to monitor the air pressure of all five tires. The tire-mounted pressure sensors transmit signals to the TPMS module by using the valve stem as an antenna. These transmissions are sent approximately every 60 seconds when the vehicle speed exceeds 32 km/h (20 mph). The TPMS module compares each tire pressure sensor transmission against low and high pressure limits. If the TPMS module determines that the tire pressure has exceeded the limit, the TPMS module communicates on the SCP network to the vehicle message center, which then displays a warning message. The system is not affected by wheel and tire rotation.

Vehicle Message Center TPMS Messages

The vehicle message center sometimes displays messages that cannot be resolved by the customer. Treat these messages as TPMS system faults that must be serviced. Refer to the symptom chart for the following messages:

Warning—Tire Very Low

Displayed when one or more tires have very low pressure. When this warning message is displayed, a warning chime will sound reminding you to stop the vehicle as soon as safely possible and check the tires for correct pressure, leaks and damage.

Check Tire Pressure

Displayed when any of the tire pressures are high or low.

Check Spare Tire Pressure

Displayed when the spare tire pressure is high or low.

Tire Pressure Sensor Fault

Displayed when a tire pressure sensor is malfunctioning.

If the customer requests that the TPMS be turned off, it can be done by configuring the message center through the instrument cluster (IC), using the scan tool. Refer to Section 413-01 .

 

[Bedrck47]

from the 03 manual

Inspection and Verification

Verify the customer concern by inspecting the vehicle and observing the message center.
Inspect to determine if one of the following mechanical or electrical concerns apply:


Visual Inspection Chart Mechanical Electrical
Tire pressure
Tire size or mismatched tires
TPMS sensor missing
Blown fuse(s)
Battery junction box (BJB):
fuse(s) 1 (10A), 21 (15A)
Connectors or connections
Ground integrity
Harness routing
Wire chafing
Circuitry open/shorted
TPMS module missing or damaged



If the inspection reveals an obvious concern(s) that can be readily identified, repair as required.
If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan tool menu. If the scan tool does not communicate with the vehicle:
check the connections to the vehicle.
check the ignition switch position.
verify that the battery voltage is between 10 and 16 volts. Refer to Section 414-00 .
If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with:
CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00 .
SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the TPMS module.
If the DTCs retrieved are related to the concern, refer to Tire Pressure Monitor Module Diagnostic Trouble Code (DTC) Index to continue diagnostics.
If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.

 

[GAINMOB]

Is there a way to determine which wheel is giving the TPMS warning on the message center?

without checking all tires theres no way of knowing quickly which one it is...then u have to go through the tires with gauge which the process is what roxy1225 gave

 

[khpony]

When I bought the Expy a month ago it didn't have a spare tire. I've since rounded up a spare wheel but have yet to get a tire mounted on it. Could this be the cause of my problem? If so when I get new tires put on it next week and put a tire on the spare rim is it possible this will resolve my problem? I have 4 new tpms sensors I purchased from eBay but the paperwork states they will need to be programmed to my vehicle but I haven't read up on the process for doing so yet. Maybe I just need to put one of them on my spare tire/wheel.

 

[khpony]

Also visual inspection on the 4 wheels they look good but? The fuses check good w/a DVM.

 

[DetroitDarin]

Does your truck's Auto 4WD work? If you put it on Auto and it goes straight to 4x4, check your wheel bearings; which if bad, can throw off the ABS.