B2872

Tire Pressure Monitoring System (TPMS)

Pinpoint Test F: TPMS (Tire Pressure Monitoring System) Indicator FLASHES for 70 Seconds and Then Remains ON Continuously When the Ignition Key is Turned to the ON Position, the Message Center Displays TIRE PRESSURE SENSOR or MONITOR FAULT and DTC B2872 or B287A is Present

Normal Operation

If there is a fault with 1, 2 or 3 of the Tire Pressure Monitoring System (TPMS) sensors, DTC B2872 is set. The TPMS (Tire Pressure Monitoring System) warning indicator flashes for 70 seconds and then remain ON continuously when the ignition switch is turned to the ON position and the message center (if equipped) displays TIRE PRESSURE SENSOR FAULT.

If the Smart Junction Box (SJB) does not get a response from all 4 of the TPMS (Tire Pressure Monitoring System) sensors, DTC B287A is set and the message center displays TIRE PRESSURE MONITOR FAULT.

- DTC B2872 (Tire Pressure Sensor Fault)- When 1, 2 or 3 of the tire pressure sensors are faulted or not responding, the SJB (Smart Junction Box) sets DTC B2872.

- DTC B287A (Tire Pressure Monitor Fault)- Whenall 4 of the tire pressure sensors are faulted, not responding or not heard by the SJB (Smart Junction Box), the SJB (Smart Junction Box) sets DTC B287A.

- TPMS (Tire Pressure Monitoring System) communication could be interrupted by radio frequency noise and cause intermittent issues that are not vehicle concerns. Radio frequency noise is generated by electrical motors and appliance operation, cellular telephones, remote transmitters, power inverters and portable entertainment equipment.

This pinpoint test is intended to diagnose the following:

- TPM (Tire Pressure Monitor) sensor(s) missing

- TPM (Tire Pressure Monitor) sensor(s) not trained to the vehicle

- TPM (Tire Pressure Monitor) sensor(s) damaged

- SJB (Smart Junction Box)

PINPOINT TEST F : TPMS (Tire Pressure Monitoring System) INDICATOR FLASHES FOR 70 SECONDS AND THEN REMAINS ON CONTINUOUSLY WHEN THE IGNITION KEY IS TURNED TO THE ON POSITION, THE MESSAGE CENTER DISPLAYS TIRE
PRESSURE SENSOR OR MONITOR FAULT AND DTC B2872 OR B287A IS PRESENT

NOTE: If a warranty case is opened for an actual TPMS (Tire Pressure Monitoring System) fault, document and include the actual tire pressure data in all warranty communications.

F1 CHECK THE SENSOR IDENTIFIERS AND SYSTEM STATUS PIDs

- Connect the scan tool.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: SJB (Smart Junction Box) DataLogger.

- Monitor the TPMS (Tire Pressure Monitoring System) system status (TP_STAT) PID.

Does the TP_STAT PID display SENSOR FAULT?

Yes
GO to F2.

No
If the TP_STAT PID displays SYSTEM FAULT, GO to F3.

F2 CARRY OUT THE SENSOR TRAINING PROCEDURE

- Read and record the following PIDs:
- Left Front Tire Transmitter Identifier (LF_ID)

- Right Front Tire Transmitter Identifier (RF_ID)

- Left Rear Tire Transmitter Identifier (LR_ID)

- Right Rear Tire Transmitter Identifier (RR_ID)


- Train all 4 tire pressure sensors. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training Sensor Training.

Did all of the tire pressure sensors transmit correctly and did the horn sound when each tire pressure sensor transmitted to the SJB (Smart Junction Box)?

Yes
Using the scan tool, LOCATE the updated TPMS (Tire Pressure Monitoring System) sensor identifiers trained to the SJB (Smart Junction Box) module.

COMPARE these values to those recorded prior to the TPMS (Tire Pressure Monitoring System) sensor training procedure. Disregarding sensor position, any sensor identifiers that do not match those retrieved from the module were changed, but not retrained. The sensors are now trained to the vehicle, diagnosis is complete.

DOCUMENT all TPMS (Tire Pressure Monitoring System) sensor identifiers on the applicable warranty claim.

VERIFY system operation.

No

Before installing a new sensor(s): If a sensor does not respond to the Tire Pressure Monitor Activation Tool, MOVE the vehicle to rotate the wheels at least one-fourth of a turn and ATTEMPT to activate the same sensor again.
If the sensor still does not respond, ATTEMPT to activate the same sensor again using the customer activation tool (if available). If the sensor still fails to train, ATTEMPT to train the sensor with the vehicle doors open.

If the sensor(s) fails to train a second time, INSTALL a new tire pressure sensor(s). REFER to Wheel and Tire - Valve Stem Mounted Tire Pressure Monitoring System (TPMS) Sensor Wheel and Tire - Valve Stem Mounted Tire Pressure Monitoring System (TPMS) Sensor.

F3 TP_STAT PID EQUALS SYSTEM FAULT WITH DTC B287A PRESENT

- Train all 4 tire pressure sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Sensor Training.

Did all of the tire pressure sensors transmit correctly and did the horn sound when each tire pressure sensor transmitted to the SJB (Smart Junction Box)?

Yes
Using the scan tool, LOCATE the updated TPMS (Tire Pressure Monitoring System) sensor identifiers trained to the SJB (Smart Junction Box) module.

COMPARE these values to those recorded prior to the Tire Pressure Monitoring System (TPMS)
Sensor Training procedure. Disregarding sensor position, any sensor identifiers that do not match those retrieved from the module were changed, but not retrained. The sensors are now trained to the vehicle, diagnosis is complete.

DOCUMENT all TPMS (Tire Pressure Monitoring System) sensor identifiers on the applicable warranty claim.

VERIFY system operation.

No

Before diagnosing the SJB (Smart Junction Box): If a sensor does not respond to the Tire Pressure Monitor Activation Tool, MOVE the vehicle to rotate the wheels at least one-fourth of a turn and ATTEMPT to activate the same sensor again. If the sensor still does not respond, ATTEMPT to activate the same sensor again using the customer activation tool (if available). If the sensor still fails to train, ATTEMPT to train the sensor with the vehicle doors open.

If the sensors fail to train a second time, GO to F4.

F4 CHECK FOR CORRECT SJB (Smart Junction Box) OPERATION

- Disconnect all the SJB (Smart Junction Box) electrical connectors.

- Check the connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.


- Connect all the SJB (Smart Junction Box) connectors and make sure that they are seated correctly.

- Operate the system and verify the concern is still present.

Is the concern still present?

Yes

NOTE: The sensors may not be present. DISMOUNT the tire. REFER to Wheel and Tire - Valve Stem Mounted Tire Pressure Monitoring System (TPMS) Sensor Wheel and Tire - Valve Stem Mounted Tire Pressure Monitoring System (TPMS) Sensor. VERIFY that the sensors are present and mounted to the wheels. If missing, INSTALL new sensors.

If the sensors are present, INSTALL a new SJB (Smart Junction Box) module. CLEAR the DTCs.
REPEAT the self-test.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.