Quote:
Originally Posted by ar0ck
Well I had no idea that it was illegal to tamper with them. The light was pretty consistent when I first got the truck to California, and on the off chance it was a small leak I checked the tire pressure regularly, and even did a factory sensor reset. That didn't do the trick, so I just dealt with it for a few months, but now the light is sporadic, it can go a whole day without popping up, and its not consistent with the roads, like turning on and off on the highway or down the street. Its just an annoying light and I have the habit of constantly watching gages as I drive and that big ol' yellow warning light is just driving me insane especially when I know nothing is wrong.
|
Ughhh...Not to go to simple here..but is it just a yellow light? Or is it popping up in some kind of information display too? If its just the light...pull the bulb? Do you have keyless entry? What happens if you pull the "DSM" fuse?
As far as replacing..if a bad sensor is the problem NAPA does sell (actually made by Schrader International) universal TPMS sensors. They may, or may not be cheaper then OE.
Some possible helpful info:
Low Tire Pressure Indicator Always On
Diagnostic Instructions
Perform the prior to using this diagnostic procedure.
Review for an overview of the diagnostic approach.
provides an overview of each diagnostic category.
Circuit/System Description
The remote control door lock receiver (RCDLR) receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensor RF transmission contains its own unique identification (ID) code that must be learned into the RCDLR memory. Once all 4 IDs have been learned and vehicle speed is greater than 32 km/h (20 mph), the RCDLR continuously compares IDs in received transmission to its learned IDs to determine if all 4 sensors are present. If the remote control door lock receiver (RCDLR) detects a low tire pressure condition or a malfuction in the system, it will send a serial data message to the instrument panel cluster (IPC) requesting tire pressure monitor indicator illumination and to display a data message on the driver information center (DIC,) if equipped.
Diagnostic Aids
Some aftermarket wheel valve stem holes are located further from the wheel rim than original equipment wheels. When using the TPM special tool to activate a sensor, ensure the tool antenna is no further than 15 cm (6 in) from the sensor and is aiming upward.
Aftermarket wheel value stem locations can cause a sensor to not function correctly.
A sensor may have been damaged due to a previous wheel/tire service or flat tire event.
The use of tire sealants can obstruct the sensor pressure sensing port and cause inaccurate tire pressure readings. If this condition is verified, remove the sealer from the tire and replace the sensor. Refer to .
Occasionally sensor transmissions are not received by the RCDLR due to vehicle level RF interference from items such as but not limited to aftermarket ignition systems, DVD players, CB radios, or metallic type window tinting.
The sensor activation procedure may have to be repeated up to 3 times before determining a sensor is malfunctioning. In the event a particular sensor's information is displayed on the special tool upon activation but the horn does not chirp, it may be necessary to rotate the wheel valve stem to a different position due to the RF signal is being blocked by another component.
Occasionally sensors can become mislocated due to previous tire rotations where the sensor learn procedure was not performed or stray sensor transmissions have been received from other vehicles. Always learn the sensors to ensure the DTC set is for that actual physical corner of the vehicle. Refer to .
Reference Information
Description and Operation
Electrical Information Reference
Scan Tool Reference
Special Tools Required
J-46079 Tire Pressure Monitor Diagnostic Tool
Circuit/System Verification
IMPORTANT: When a TPM DTC is set, the tire pressure monitor indicator icon will flash for 1 minute after the IPC bulb check is completed and then remains illuminated. If equipped with a DIC, a SERVICE TIRE MONITOR SYSTEM message will also be displayed.Low tire pressure in one or more tires is indicated by a continuously illuminated tire pressure monitor indicator icon after the IPC bulb check is completed. If equipped with a DIC, a CHECK TIRE PRESSURE message will also be displayed.
Cycle the ignition from OFF to ON. After the instrument panel cluster (IPC) bulb check is complete, the tire pressure monitor indicator icon should not be illuminated.
Circuit/System Testing
Inflate all tires to the proper pressure and drive the vehicle over 32 km/h (20 MPH) for over 2 minutes. Refer to .
Using the J-46079 , activate each tire pressure sensor and record each sensors tire pressure reading. Check the tire pressures with a known accurate hand held tire pressure gauge. Verify that the pressure readings from the special tool do not differ more than 27.6 kPa (4 psi) from the actual tire pressure readings.
If not within the specified range, replace the suspect tire pressure sensor.
Using a scan tool, enable the TPM learn mode. Use the J-46079 in simulate mode to learn 4 simulated sensor transmissions into the RCDLR. Observe tire pressures in the scan tool data display. Verify the simulated tire pressures do not differ more than +/- 27.6 kPa (4 psi) of the scan tool reading.
If not within the specified range, replace the RCDLR.
Using a scan tool, select instrument panel special functions Lamp Test. Command the instrument panel warning lamps OFF. Verify the tire pressure monitor indicator icon turns OFF.
If the tire pressure monitor icon does not turn OFF, replace the IPC.
Ignition ON, use the scan tool to setup the Tire Type/Pressure Selection in the RCDLR Module Setup menu. Refer to the . Verify the tire pressure monitor indicator icon turns OFF.
If the tire pressure monitor icon does not turn OFF, replace the RCDLR.
Repair Procedures
Perform the after completing the diagnostic procedure.
for IPC or RCDLR replacement, setup, and programming
Low Tire Pressure Indicator Inoperative
Diagnostic Instructions
Perform the prior to using this diagnostic procedure.
Review for an overview of the diagnostic approach.
provides an overview of each diagnostic category.
Circuit/System Description
The remote control door lock receiver (RCDLR) receives a radio frequency (RF) transmission from each tire pressure sensor. Each sensor RF transmission contains its own unique identification (ID) code that must be learned into the RCDLR memory. Once all 4 IDs have been learned and vehicle speed is greater than 32 kph (20 mph), the RCDLR continuously compares IDs in received transmission to its learned IDs to determine if all 4 sensors are present. If the remote control door lock receiver (RCDLR) detects a low tire pressure condition or a malfunction in the system, it will send a serial data message to the instrument panel cluster (IPC) requesting tire pressure monitor indicator icon illumination and to display a data message on the driver information center (DIC) if equipped.
Diagnostic Aids
Some aftermarket wheel valve stem holes are located further from the wheel rim than original equipment wheels. When using the TPM special tool to activate a sensor, ensure the tool antenna is no further than 15 cm (6 in) from the sensor and is aiming upward.
Aftermarket wheel value stem locations can cause a sensor to not function correctly.
A sensor may have been damaged due to a previous wheel/tire service or flat tire event.
The use of tire sealants can obstruct the sensor pressure sensing port and cause inaccurate tire pressure readings. If this condition is verified, remove the sealer from the tire and replace the sensor. Refer to .
Occasionally sensor transmissions are not received by the RCDLR due to vehicle level RF interference from items such as but not limited to aftermarket ignition systems, DVD players, CB radios, or metallic type window tinting.
The sensor activation procedure may have to be repeated up to 3 times before determining a sensor is malfunctioning. In the event a particular sensor's information is displayed on the special tool upon activation but the horn does not chirp, it may be necessary to rotate the wheel valve stem to a different position due to the RF signal is being blocked by another component.
Occasionally sensors can become mislocated due to previous tire rotations where the sensor learn procedure was not performed or stray sensor transmissions have been received from other vehicles. Always learn the sensors to ensure the DTC set is for that actual physical corner of the vehicle. Refer to .
Reference Information
Description and Operation
Electrical Information Reference
Scan Tool Reference
Special Tools Required
J-46079 Tire Pressure Monitor Diagnostic Tool
Circuit/System Testing
With the scan tool, select instrument panel special functions Lamp Test. Command the instrument panel lamps ON. Verify tire pressure monitor indicator icon turns ON.
If the icon does not turn ON, replace the IPC.
Using the tire pressure monitor (TPM) special tool to observe the tire pressure of the suspected faulty sensor. Check the air pressure with a known accurate tire pressure gage. Compare the pressure reading to the display on the TPM special tool. Verify the pressure readings from special tool do not differ 13.8 kPa (2 psi) or more than actual tire pressure.
If not within the specified range, replace the suspect tire pressure sensor.
With the scan tool, observe tire pressures in the scan tool data display. Verify pressure readings from special tool do not differ 13.8 kPa (2 psi) or more than scan tool data display.
If not within the specified range, replace the RCDLR.