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Pinpoint Test K: DTCs B2872, B287A




Tire Pressure Monitoring System

Pinpoint Test K: DTCs B2872, B287A

NOTE: If the vehicle has been stationary for more then 30 minutes, the sensors go into sleep mode to conserve battery power. It becomes necessary to wake them up to transmit the latest tire pressure information to the Tire Pressure Monitoring System (TPMS). Refer to Tire Pressure Monitoring System (TPMS) Sensor Activation Tire Pressure Monitoring System (TPMS) Sensor Activation.

Normal Operation

The TPMS normally receives a response from all 4 sensors, if the Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM) does not receive a response from one or more sensors, the TPMS system sets DTCs B2872 and B287A. When no response is received from all four sensors, the TPMS indicator flashes for 70 seconds from key ON and then remains ON continuously.

- DTC B2872 (Tire Pressure Sensor Fault) - sets if the Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM) has been unable to communicate with 1 or more sensors (up to 3) for more than 20 minutes.
- DTC B287A (Tire Pressure System Fault) - sets if the TPM/ VSM has been unable to communicate with all 4 sensors for more than 20 minutes.
- TP_STAT = SYSTEM FAULT is displayed if the TPM/ VSM does not receive a signal transmission from all 4 TPMS sensors for 20 minutes and the vehicle speed is above 32 km/h (20 mph).

This pinpoint test is intended to diagnose the following:

- TPMS sensors not trained to the TPM/VSM
- TPMS sensors missing
- Incorrect TPMS sensor installed
- TPMS
- Radio Frequency Interference (RFI)

PINPOINT TEST K: DTCs B2872, B287A

NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors go into sleep mode" to conserve battery power. It is necessary to wake them up to transmit the latest tire pressure information to the TPM/VSM. Refer to Tire Pressure Monitoring System (TPMS) Sensor Activation Tire Pressure Monitoring System (TPMS) Sensor Activation.

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K1 CHECK TPMS SENSOR IDENTIFIERS (IDs) AND CARRY OUT TPMS SENSOR TRAINING PROCEDURE

NOTE: Make sure that all aftermarket electronic equipment has been disconnected (if possible) and that the customer has been questioned about the kinds of electronic equipment they may have been using in the vehicle when this issue was identified.

- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: VSM DataLogger.
- 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 the TPMS sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: VSM DataLogger .
- 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)
- Did all the sensors train?

Yes
GO to K2.

No
GO to K3.

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K2 COMPARE THE SENSOR IDENTIFIERS BEFORE AND AFTER SENSOR TRAINING

- 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)
- Compare the recorded PID readings taken before sensor training with the readings taken after sensor training.
- Did all the sensors match?

Yes
If all the sensors trained, REFER to Tire Pressure Monitoring System (TPMS) principles of operation for additional Information on training sensors. Principles Of Operation

No
Any sensor identifiers that do not match were mounted to the vehicle without the required sensor training. REFER to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.

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K3 SENSOR(S) NOT RESPONDING TO TRAINING

- NOTE: Sensor(s) that won't train may be broken, missing, or the wrong sensor(s) may be installed.
- Dismount tire and inspect the suspect TPMS sensor(s).
- Install a new sensor(s) as necessary. Refer to Tire Pressure Monitoring System (TPMS) Sensor Service and Repair.
- Retrain the TPMS sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Did all the TPMS sensors transmit to the TPM/VSM?

Yes
The system is functioning normally.

No
GO to K4.

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K4 CHECK TPMS SYSTEM OPERATION

- Disconnect all the TPM/ VSM electrical connectors.
- Check the connectors for:

- corrosion.
- pushed-out pins.
- spread terminals.
- Connect all the TPM/ VSM connectors and make sure that they are seated correctly.
- Attempt to train the TPMS sensors again. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Is the concern still present?

Yes
GO to K5.

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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K5 CHECK TPM/VSM

NOTE: Make sure that all aftermarket electronic equipment has been disconnected (if possible) and that the customer has been questioned about the kinds of electronic equipment they may have been using in the vehicle when this issue was identified. A faulty TPM/VSM and a module affected by can behave in the same way. Care must be taken to make sure the root cause of the issue is clearly identified.

- Attempt to train the TPMS sensors with all aftermarket electronic equipment disconnected. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Did all the TPMS sensors transmit to the TPM/VSM?

Yes
If the concern and/or DTCs return after the road test, the customer needs to be informed that their aftermarket equipment is causing unwanted RFI with the TPM/VSM and the system is functioning as designed under Federal Communications guidelines.

No
INSTALL a new TPM/VSM. REFER to Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan Tire Pressure Monitoring System (TPMS) Module - 4-Door Sedan or Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback Tire Pressure Monitoring System (TPMS) Module - 5-Door Hatchback. TEST the system for normal operation.

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