Buick Encore: Repair instructions
Tire pressure indicator sensor replacement
Removal Procedure
- Raise the vehicle on a suitable support. Refer to Lifting and Jacking
the Vehicle .
- Remove the tire/wheel assembly from the vehicle. Refer to Tire and Wheel
Removal and Installation .
- Dismount the tire from the rim. Refer to Tire Dismounting and Mounting
Fig. 1: View Of Tire Pressure Indicator Sensor
NOTE: When servicing the tire pressure sensor always use a new
Schrader tire pressure monitoring (TPM) sensor and a new TORX screw during
installation.
- Remove the TORX screw (1) from the tire pressure sensor (2) and pull it
straight off the tire pressure
valve stem (3).
CAUTION: Do not scratch or damage the clear coating on aluminum wheels
with
the tire changing equipment. Scratching the clear coating could
cause the aluminum wheel to corrode and the clear coating to peel
from the wheel.
- Remove the tire pressure valve stem by pulling it through the rim.
Installation Procedure
Fig. 2: View Of Tire Pressure Indicator Sensor
CAUTION: Refer to Fastener Caution .
NOTE:
- Ensure the flat of the valve, lines up with the flats of the snap in
the
enclosure.
- TPM valves and TORX screws are single use items.
- Assemble the tire pressure sensor (2) to the valve stem and install the
new TORX screw (3), tighten to 1.3
N.m (11.5 lb in).
NOTE: Use an approved tire mounting lubricant. DO NOT use
silicon or corrosive
base compounds to lubricate the tire bead and the wheel rim. A corrosive
type compound can cause tire or rim deterioration.
- Apply tire soap to the rubber portion of the valve stem (1).
Fig. 3: View Of Tire Valve Stem Mounting Tool
- Using a tire valve stem mounting tool, pull the valve stem through in a
direction parallel to the valve hole
on the rim.
NOTE: Snap Fit TPM sensors are shipped in the OFF mode. The sensor
will exit its OFF state when the tire is inflated.
- Mount the tire to the rim. Refer to Tire Dismounting and Mounting .
- Install the tire/wheel assembly on the vehicle. Refer to Tire and Wheel
Removal and Installation .
- Lower the vehicle.
- Learn the tire pressure sensors. Refer to Tire Pressure Indicator Sensor
Learn.
Tire pressure indicator sensor learn
Special Tools
- EL-46079 Tire Pressure Monitor Diagnostic Tool
- EL-50448 Tire Pressure Monitor Sensor Activation Tool
For equivalent regional tools, refer to Special Tools.
Learn Mode Description
The tire pressure monitor system uses the instrument cluster, body control
module (BCM), 4 radio frequency
transmitting pressure sensors, and the serial data circuit to perform the tire
pressure monitor learn mode
functions. The sensor learn procedure must be performed after every tire
rotation, BCM replacement, or sensor
replacement. Once the Learn mode has been enabled, each of the sensors unique
identification codes can be
learned into the BCM memory. When a sensor ID has been learned, the BCM sounds a
horn chirp indicating the
sensor has transmitted its ID and the BCM has received and learned it. The BCM
must learn the sensor IDs in
the proper sequence to determine correct sensor location. The first learned ID
is assigned to the left front
location, the second to right front, the third to right rear and the fourth to
left rear. The turn signals will
individually illuminate indicating which location is to be learned in the proper
sequence.
Sensor Functions Using EL-46079, EL-50448, or Equivalent
Each sensor has an internal low frequency coil. When the tire pressure
monitor special tool is used in activate
mode, it produces a low frequency transmission that activates the sensor. The
sensor responds to a low
frequency activation by transmitting in Learn Mode-Remotely Triggered. When the
BCM receives a learn mode
transmission while in Learn mode, it will assign that sensors ID to the location
on the vehicle relative to the
order in which it was learned.
Learn Mode Cancellation
The Learn mode will cancel if the ignition is cycled to OFF or if more than 2
minutes has elapsed for any sensor
that has not been learned. If the relearn mode is cancelled before the first
sensor is learned, the original sensor
IDs will be maintained. If the relearn mode is canceled after the first sensor
is learned, the following will occur:
- All stored sensor IDs will be invalidated in the BCM memory.
- If equipped, the driver information center will display dashes instead
of tire pressures.
- DTC C0775 will be set.
These conditions will now require the Learn procedure to be repeated for the
system to function properly.
Tire Pressure Monitor Learn Procedure
NOTE: In the event when a particular sensor is activated and the
horn does not chirp, it
may be necessary to rotate the wheel valve stem to a different position due to
the sensor signal is being blocked by another component.
- Apply park brake (manual transmission only).
- Ignition ON, using a scan tool or driver information center
buttons (refer to owners manual), initiate the
Tire Pressure Sensors Learn mode. A double horn chirp will sound indicating
the Learn mode has been
enabled. The left front turn signal will also be illuminated.
- Starting with the left front tire, active the sensor by holding the
antenna of the tire pressure monitor
special tool aimed upward against the tire sidewall close to the wheel rim
at the valve stem location. Press
and release the activate button. Ensure that the transmit indicator on the
special tool indicates that the
sensor activation signal is being transmitted. Wait for a horn chirp. If the
horn does not chirp, repeat the
sensor activation sequence with the tool. Once the horn chirp has sounded,
the sensor information is
learned and the turn signal in the next location to be learned will
illuminate.
- After the horn chirp has sounded and the right front turn signal is
illuminated, repeat step 3 for the
remaining 3 sensors in the following order:
- Right front
- Right rear
- Left rear
- When the left rear sensor has been learned and a double horn chirp has
sounded, the learn process is
complete and the BCM exits the Learn mode.
READ NEXT:
TIRE PRESSURE MONITOR DESCRIPTION AND OPERATION
Tire Pressure Monitoring Block Diagram
Fig. 4: Tire Pressure Monitoring System Wiring Schematic
Special Tools
EL-46079/J-46079 Tire Pressure Mon
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
ADHESIVES, FLUIDS, LUBRICANTS, AND SEALERS
Adhesives, Fluids, Lubricants, and Sealers
DIAGNOSTIC INFORMATION AN
SEE MORE:
The power steering control module scan tool data parameters list contains all
power steering related parameters
that are available on the scan tool. The list is arranged in alphabetical order.
A given parameter may appear in
any one of the data lists.
Power Steering Control Module Scan Tool Data P
SPECIFICATIONS
FASTENER TIGHTENING SPECIFICATIONS
Fastener Tightening Specifications
SCHEMATIC WIRING DIAGRAMS
RADIO/NAVIGATION SYSTEM WIRING SCHEMATICS (ENCORE)
Power, Ground, Serial Data, Antenna, and Audio Input
Fig. 1: Power, Ground, Serial Data, Antenna, and Audio Input
Amplifier Power, Gro