TPMS Relearn

Reset and relearn the tire pressure monitoring system (TPMS) sensors on a 2009 Aston Martin DB9 using the OBD-II diagnostic tool method to register new or existing sensor IDs with the vehicle's ECU.

Warnings

Tools required

Preparation

1. Park vehicle on level surface and engage parking brake.
2. Turn ignition to OFF position and remove key.
3. Check and adjust all four tire pressures to manufacturer specification (refer to driver's door jamb placard).
4. Verify TPMS warning light is illuminated on instrument cluster, indicating system requires relearn or has detected a fault.
5. Ensure diagnostic scanner is updated with latest Aston Martin software and TPMS relearn protocols.

Procedure

1. 1

   Connect diagnostic scanner
   Locate the OBD-II diagnostic port in the driver's side footwell/dash area beneath the steering column (verify exact position for this vehicle). Plug the diagnostic scanner into the port firmly until it seats completely. Turn the ignition to ON position (do not start engine) and wait for the scanner to establish communication with the vehicle's control modules.
2. 2

   Access TPMS relearn function
   Navigate the diagnostic scanner menu to the TPMS or body/receiver control module (menu location varies by scanner and may be listed under Chassis or Body rather than ABS). Select TPMS functions, then choose 'TPMS Relearn' or 'Sensor ID Programming' option. The exact menu path varies by scanner brand; consult your scan tool's on-screen prompts, noting the TPMS function may be listed under Body, Chassis, or Receiver module rather than ABS on this vehicle.
3. 3

   Verify tire pressures via scanner
   Before initiating relearn, use the scanner to read current TPMS sensor data. Verify that all four sensors are transmitting signals and that displayed pressures match your physical gauge readings within 1-2 PSI. If any sensor shows no data or '--', that sensor may be faulty or its battery depleted and should be diagnosed separately before proceeding.
4. 4

   Initiate automatic relearn sequence
   Select 'Start Relearn' or 'Write Sensor IDs' on the diagnostic scanner. The scanner will command the ABS/TPMS module to enter learn mode and automatically detect the sensor IDs from each wheel position. The DB9 TPMS relearn generally requires each sensor to be activated at the wheel with a TPMS trigger/activation tool (or by programming known sensor IDs) so the module can capture each sensor ID and position; follow your scanner's prompts, which may instruct you to trigger each wheel in sequence. Wait for the scanner to display confirmation that all four sensor IDs have been successfully written to the module. Wait for the scanner to display confirmation that all four sensor IDs have been successfully written to the module, typically taking 1-2 minutes. Note: Depending on the sensor and tool used, the DB9 relearn may require a handheld TPMS trigger/activation tool to wake each sensor at the wheel so its ID can be captured and written to the module; follow your scan tool's on-screen prompts for whether sensors must be individually activated. Note: The relearn method for the DB9 may require a dedicated TPMS activation/trigger tool to wake each sensor at each wheel position so the module can capture the sensor IDs; consult the scanner's on-screen prompts and Aston Martin service documentation to confirm whether manual sensor activation or a drive cycle is required.
5. 5

   Confirm sensor positions
   The scanner should display the learned sensor IDs along with their assigned wheel positions (LF, RF, LR, RR). Verify that each position shows a unique sensor ID (format and length will depend on the sensor type and scanner display). If the system did not auto-locate positions, you may need to manually assign sensor IDs to wheel positions using the scanner's manual assignment function, matching IDs to the physical sensor labels or previous records. Note: Verify that each position shows a unique sensor ID (format and length as displayed by your scanner).
6. 6

   Clear TPMS fault codes
   After successful relearn, navigate to the fault code section of the ABS/TPMS module in the scanner. Clear any stored TPMS-related diagnostic trouble codes (DTCs) that may have been set during sensor replacement or low battery conditions. This ensures the warning light will extinguish if no active faults remain.
7. 7

   Exit learn mode and cycle ignition
   Exit the TPMS relearn function on the scanner and disconnect it from the OBD-II port. Turn the ignition OFF, wait 10 seconds, then turn ignition back to ON position without starting the engine. Observe the instrument cluster during the bulb check sequence—the TPMS warning light should illuminate briefly then extinguish after 3-5 seconds, indicating successful relearn.
8. 8

   Perform verification drive
   Start the engine and drive the vehicle at moderate road speed for several minutes (consult Aston Martin service documentation or your scan tool for the specific drive-cycle speed and duration required for this vehicle). This allows the TPMS system to receive multiple transmissions from all sensors and confirm proper operation. Monitor the instrument cluster to ensure the TPMS warning light does not re-illuminate during or after the drive.

Reassembly

1. No disassembly required for this procedure.

Verification

• Confirm TPMS warning light remains OFF after ignition cycle and test drive.
• Use diagnostic scanner to read live TPMS data and verify all four sensors are reporting current tire pressures accurately.
• Verify each wheel position (LF, RF, LR, RR) displays the correct pressure within 1 PSI of physical gauge measurement.
• Intentionally deflate one tire by 5-7 PSI and confirm the TPMS warning light illuminates within 1-2 minutes of driving, then re-inflate to proper pressure to verify system responsiveness.

More procedures for this vehicle