NOTE: TPM thresholds have been established for the original tire size equipped on the vehicle. Use original
size tires only to maintain system accuracy.
DIAGNOSIS AND TESTING
TIRE PRESSURE SENSOR
NOTE: Tire pressure may increase from 2 to 6 psi (14 to 41 kPa) during normal driving conditions. Do NOT
reduce this normal pressure build up.
When diagnosing a tire pressure issue, always check air pressure in the tires first with a known accurate air gauge.
Adjust air pressure as necessary to that listed on the Tire Inflation Pressure Label (Placard) provided with the vehi-
cle (usually applied to the driver’s side B-pillar). After adjusting air pressure in a tire on the vehicle, allow approxi-
mately two minutes for the message or indicator lamp to go out.
Check the tire pressure indicator lamp in the instrument cluster. If the lamp is illuminating continuously, proceed as
listed below. If the indicator lamp is flashing on/off for 60 seconds, once every 10 minutes, there is a system fault
detected. Refer to the appropriate diagnostic information.
If air pressure in any tire is low, inspect all the tires for leaks. A water “dunk tank” or other water test may be used
to check for a leak around the sensor as long as any water at the valve core is removed once the procedure is
completed. The water can be easily expelled from the core area by pushing in on the core for several seconds,
allowing escaping air to drive out any moisture. Reinflate the tire as necessary. Always make sure the original valve
stem cap is securely installed to keep moisture out of the sensor.
If the gauge-read pressure in the tires does not indicate a tire pressure issue, refer to the appropriate diagnostic
information.
REMOVAL
1. Raise and support vehicle. (Refer to LUBRICATION & MAINTENANCE/HOISTING - STANDARD PROCEDURE)
2. Remove wheel mounting nuts (3), then tire and
wheel assembly (1). (Refer to 22 - TIRES/WHEELS
- REMOVAL)
CAUTION: The cap used on this valve stem contains an O-ring seal to prevent contamination and moisture
from entering the valve stem. Retain this valve stem cap for reuse. Do not substitute a regular valve stem
cap in its place.
CAUTION: The valve stem used on this vehicle is made of aluminum and the core is nickel plated brass.
The original valve stem core must be reinstalled and not substituted with a valve stem core made of a dif-
ferent material. This is required to prevent corrosion in the valve stem caused by the different metals.
PM
TIRES/WHEELS - SERVICE INFORMATION
22 - 71