Pinpoint Test I: DTC B2872 (DTC B287A Is Not Present)
Tire Pressure Monitoring System (TPMS)
Pinpoint Test I: DTC B2872 (DTC B287A Is Not Present)
Normal Operation
If there is a concern with 1 or more Tire Pressure Monitoring System (TPMS) sensors, the TPMS (Tire Pressure Monitoring System) sets DTC B2872. The TPMS (Tire Pressure Monitoring System) warning indicator flashes for 70 seconds from key ON and then remains on continuously. This symptom occurs when the Tire Pressure Monitor (TPM) /Vehicle Security Module (VSM) does not receive the tire pressure data from a sensor or is incapable of receiving the tire pressure data from a sensor(s) for 20 minutes.
- DTC B2872 (Tire Pressure Sensor Fault)- sets if the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) has been unable to communicate with 1 or more sensors (up to 3) for more than 20 minutes.
This pinpoint test is intended to diagnose the following:
- TPMS (Tire Pressure Monitoring System) sensors not trained to the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module)
- TPMS (Tire Pressure Monitoring System) sensors not transmitting or damaged
- TPMS (Tire Pressure Monitoring System) sensors missing
- Incorrect TPMS (Tire Pressure Monitoring System) sensor installed
- Spare tire in use
- Radio Frequency Interference (RFI)
PINPOINT TEST I : DTC B2872 (DTC B287A IS NOT PRESENT)
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 (Tire Pressure Monitor) /VSM (Vehicle Security Module). Refer to Tire Pressure Monitoring System (TPMS) Sensor Activation .
I1 CHECK TPMS (Tire Pressure Monitoring System) SENSOR IDENTIFIERS AND FOR SPARE TIRE USE
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.
NOTE: A spare tire cannot be programmed to the vehicle, even if equipped with a TPMS (Tire Pressure Monitoring System) sensor. If a damaged road wheel is located in the trunk and the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) cannot communicate with it, or if the damaged wheel has been dropped off at a dealership or repair shop, the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) sets a TPMS (Tire Pressure Monitoring System) sensor fault.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) 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)
Is the spare tire in use?
Yes
REPAIR and REMOUNT the wheel to the vehicle. REFER to Wheel and Tire . ADJUST the tire pressure to the required pressure as defined on the Vehicle Certification (VC) label.
No
GO to I2.
I2 CARRY OUT TPMS (Tire Pressure Monitoring System) SENSOR TRAINING
- Train the TPMS (Tire Pressure Monitoring System) sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training .
Did all the sensors train?
Yes
GO to I3.
No
GO to I4.
I3 COMPARE THE SENSOR IDENTIFIERS BEFORE AND AFTER SENSOR TRAINING
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module) 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 transmitter identifier PID readings taken before and after sensor training.
Did all the sensors match?
Yes
REFER to PID Definitions and Intermittent Troubleshooting.
No
Disregarding position, any sensor identifiers that do not match were mounted to the vehicle without the required sensor training. Sensor training in the previous step has corrected the condition.
I4 SENSOR(S) NOT RESPONDING TO TRAINING
- NOTE: Sensor(s) that will not train may be broken, missing, affected by RFI (Radio Frequency Interference) or the wrong sensor(s) may be installed.
Dismount tire and inspect the suspect TPMS (Tire Pressure Monitoring System) sensor(s).
- Install a new sensor(s) as necessary. Refer to Tire Pressure Monitoring System (TPMS) Sensor .
- Retrain the TPMS (Tire Pressure Monitoring System) sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training .
Did all the tire pressure sensors transmit to the TPM (Tire Pressure Monitor) /VSM (Vehicle Security Module)?
Yes
The system is functioning normally.
No
REFER to PID Definitions and Intermittent Troubleshooting.