Pinpoint Test F: The Tire Pressure Monitoring System (TPMS) Warning Indicator Illuminates With DTCs Present

Tire Pressure Monitoring System

Pinpoint Tests

Pinpoint Test F: The Tire Pressure Monitoring System (TPMS) Warning Indicator Illuminates With DTCs Present

Normal Operation

If there is a fault with 1, 2 or 3 of the Tire Pressure Monitoring System (TPMS) sensors, DTC B124D:02 sets. The TPMS warning indicator flashes for 70 seconds and then remains on continuously when the ignition switch is turned to the ON position and the message center displays TIRE PRESSURE SENSOR FAULT.

If the Body Control Module (BCM) does not get a response from all 4 of the TPMS sensors, DTC B1182:00 sets and the message center displays TIRE PRESSURE MONITOR FAULT.

It should be noted that TPMS communication can be interrupted by radio frequency noise, which can 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.

- DTC B1182:00 (Tire Pressure Monitoring System (TPMS): No Sub Type Information) - The BCM sets this DTC when all 4 of the tire pressure sensors are faulted, not responding or when the tire pressure data is not received by the BCM.
- DTC B124D:02 (Tire Pressure Sensor: General Signal Failure) - The BCM sets this DTC when 1, 2 or 3 of the TPMS sensors are faulted, not responding or when the tire pressure data is not received by the BCM .

This pinpoint test is intended to diagnose the following:
- Not all TPMS sensors are installed
- TPMS sensors not trained
- Intermittent TPMS operation due to Radio Frequency Interference (RFI)
- TPMS sensor(s)
- BCM

PINPOINT TEST F: THE TPMS WARNING INDICATOR ILLUMINATES WITH DTCs 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.

NOTE: If the vehicle has been stationary for more than 30 minutes, the sensors go into a sleep mode to conserve battery power. It is necessary to wake them up so they transmit the latest tire pressure information to the BCM.

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F1 CHECK THE HORN OPERATION

- Press the horn switch and confirm the horn sounds.
- Does the horn sound?

Yes
GO to F2.

No
REFER to Horn Testing and Inspection.

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F2 CHECK THE SYSTEM STATUS PIDs

- Connect the scan tool.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: BCM DataLogger.
- Monitor the TPMS system status (TPMS_STATUS) PID.
- Does the PID display SENSOR FAULT?

Yes
GO to F3.

No
If the PID displays SYSTEM FAULT, GO to F4.

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F3 CARRY OUT THE SENSOR TRAINING PROCEDURE

- Read and record the following PIDs:
- Left Front Tire Transmitter Identifier (TPM_S_ID_LF)
- Right Front Tire Transmitter Identifier (TPM_S_ID_RF)
- Left Rear Tire Transmitter Identifier (TPM_S_ID_LRO)
- Right Rear Tire Transmitter Identifier (TPM_S_ID_RRO)
- Train all 4 TPMS sensors. Refer to Tire Pressure Monitoring System (TPMS) Sensor Training Tire Pressure Monitoring System (TPMS) Sensor Training.
- Did all of the TPMS sensors transmit correctly when each TPMS sensor transmitted to the BCM?

Yes
Using the scan tool, LOCATE the updated TPMS sensor identifiers trained to the BCM 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 TPMS sensors are now trained to the vehicle, diagnosis is complete.

DOCUMENT all TPMS sensor identifiers on the applicable warranty claim.

CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
If the TPMS sensors fail to train, REFER to Wheel Rotation And Sensor Training Techniques.

If the TPMS sensor(s) fails to train a second time, INSTALL a new TPMS sensor(s) for the sensor(s) in question. REFER to Tire Pressure Monitoring System (TPMS) Sensor Service and Repair.

CLEAR the DTCs. REPEAT the self-test.

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F4 CHECK FOR CORRECT BCM OPERATION

- Disconnect all the BCM electrical connectors.
- Check the connectors for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the BCM 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 TPMS sensors may not be present. DISMOUNT the tire. REFER to Wheel and Tire Overhaul. VERIFY the TPMS sensors are present and mounted to the wheels. If missing, INSTALL new TPMS sensors.

If the TPMS sensors are present, INSTALL a new BCM. 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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