Pinpoint Test J: Both DTCs B2872 and B287A Are Present
Tire Pressure Monitoring System
Pinpoint Tests
Pinpoint Test J: Both DTCs B2872 and B287A Are Present
NOTE: If the vehicle has been stationary for more then 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 Tire Pressure Monitor (TPM)/Vehicle Security Module (VSM). Refer to Tire Pressure Monitoring System (TPMS) Sensor Activation Tire Pressure Monitoring System (TPMS) Sensor Activation.
Normal Operation
The TPM/VSM normally receives a response from all 4 sensors. If the module is incapable of receiving a signal transmission from any of the 4 sensors, the Tire Pressure Monitoring System (TPMS) sets DTCs B2872 and B287A. The TPMS warning indicator flashes for 70 seconds from key ON and then remains on continuously. This symptom occurs when the TPM/VSM does not receive the tire pressure data from all 4 sensors or is incapable of receiving the tire pressure data from all 4 sensors for 20 minutes.
- SYSTEM FAULT is displayed by the PID TP_STAT 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).
- DTC B2872 (Tire Pressure Sensor Fault) - sets if the TPM/ 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.
This pinpoint test is intended to diagnose the following:
- TPMS sensors not trained to the TPM/VSM
- TPM/VSM
- Radio Frequency Interference (RFI)
PINPOINT TEST J: BOTH DTCs B2872 AND B287A ARE PRESENT
NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors goes 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.
NOTE: If referred here from Pinpoint Test K, Go to J3.
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J1 CHECK TPMS SENSOR IDENTIFIERS 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: TPM/ 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.
- Did all the sensors train?
Yes
GO to J2.
No
GO to J3.
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J2 COMPARE THE SENSOR IDENTIFIERS BEFORE AND AFTER SENSOR TRAINING
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: TPM/ 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)
- Compare the recorded PID readings taken before and after sensor training.
- Did all the sensors match?
Yes
REFER to PID Definitions and Intermittent Troubleshooting. Principles Of Operation
No
Sensor identifiers that do not match were mounted to the vehicle without the required sensor training. The system is now functioning correctly.
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J3 SENSOR(S) NOT RESPONDING TO TRAINING
- NOTE: Sensor(s) that will not train may be broken, missing, affected by RFI 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 TPMS/VSM?
Yes
The system is now functioning correctly.
No
GO to J4.
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J4 CHECK TPMS OPERATION
- Disconnect all the TPM/ VSM electrical connectors.
- Check the connectors for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the TPMS connectors and make sure they seat 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 J5.
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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J5 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 RFI can behave in the same way. Care must be taken to make sure the root cause of the issue is clearly identified.
- Disconnect all aftermarket equipment.
- 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 Service and Repair.
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