Pinpoint Test F: TPMS Indicator FLASHES for 70 Seconds and Then Remains ON Continuously When the Ignition Key is Turned to the
Tire Pressure Monitoring System
Pinpoint Tests
Pinpoint Test F: TPMS 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 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 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 sets DTC B2872.
- DTC B287A (Tire Pressure Monitor Fault) - When all 4 of the tire pressure sensors are faulted, not responding or not heard by the SJB, the SJB sets DTC B287A.
- TPMS 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 sensor(s) missing
- TPM sensor(s) not trained to the vehicle
- TPM sensor(s) damaged
- SJB
PINPOINT TEST F: TPMS 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 fault, document and include the actual tire pressure data in all warranty communications.
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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 DataLogger.
- Monitor the TPMS 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.
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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 Tire Pressure Monitoring System (TPMS) 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?
Yes
Using the scan tool, LOCATE the updated TPMS sensor identifiers trained to the SJB module.
COMPARE these values to those recorded prior to the 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 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 Overhaul.
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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 Tire Pressure Monitoring System (TPMS) 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?
Yes
Using the scan tool, LOCATE the updated TPMS sensor identifiers trained to the SJB 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 sensor identifiers on the applicable warranty claim.
VERIFY system operation.
No
Before diagnosing the SJB: 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.
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F4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB electrical connectors.
- Check the connectors for:
- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all the SJB 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 Overhaul. 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 module. REFER to Multifunction Electronic Modules Service and Repair. 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.
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