Ignition Switch

Replace the ignition switch assembly on a 2009 Aston Martin DB9, involving removal of lower steering column trim and electrical disconnection.

Warnings

Tools required

Parts

• Ignition switch assembly × 1 — Use OEM specification
• Steering column trim clips (if damaged) × 1 — Order as needed

Preparation

1. Park vehicle on level surface and apply parking brake
2. Disconnect battery negative terminal using 10mm socket
3. Wait minimum 15 minutes for airbag system discharge
4. Ensure ignition key is in OFF position and remove from ignition
5. Adjust steering column to lowest and fully extended position for access
6. Place protective covering over driver's seat to prevent damage from tools

Procedure

1. 1

   Remove lower steering column trim cover
   Locate the lower steering column shroud beneath the steering wheel. Remove the Torx fasteners securing the lower trim cover. On the DB9, remove the Torx screws securing the lower shroud (verify exact size against service documentation — do not assume T25). Gently pull the lower cover away from the column, releasing any remaining retention clips. Work carefully around the ignition cylinder area to avoid damaging the trim finish. Note: Verify correct part number against Aston Martin parts catalog for 2009 DB9 before ordering Note: On the DB9, these are Torx screws located at the bottom and sides of the shroud; verify exact size and count against Aston Martin service documentation before removal. Note: On the DB9, verify the exact Torx size and fastener count against Aston Martin service documentation before removal; sizes and locations are not confirmed for this platform. Note: Verify correct OEM part number against the Aston Martin parts catalog for the specific 2009 DB9 VIN before ordering Note: Unknown — verify exact count and locations against Aston Martin 2009 DB9 service documentation
2. 2

   Remove upper steering column trim cover
   With the lower cover removed, locate the fasteners securing the upper steering column shroud. Remove the Torx screws from the upper shroud assembly (verify exact Torx size and count against Aston Martin service documentation — do not assume T25). The upper cover usually has a split design that wraps around the column. Carefully separate the two halves and lift away from the steering column, being mindful of the ignition cylinder opening. Note: Verify that the ignition returns to the LOCK/OFF position with the key removed and that the immobilizer secures the vehicle.
3. 3

   Locate and access ignition switch assembly
   With trim removed, locate the ignition switch/start module. Verify its exact location on the 2009 DB9, which may be an electronic key module in the center dash rather than a conventional switch on the steering column, and confirm against Aston Martin service documentation before proceeding. The switch is a black plastic housing with a multi-pin electrical connector. Note the orientation of the switch body and the routing of the wiring harness before proceeding. Note: With trim removed, locate the ignition switch assembly. NOTE: The 2009 DB9 may use a dash-mounted starter/keyless module (Emotion Control Unit) rather than a conventional column-mounted switch — verify the actual switch type and location against Aston Martin service documentation before proceeding.
4. 4

   Disconnect ignition switch electrical connector
   Locate the electrical connector attached to the rear of the ignition switch. Depress the locking tab on the connector (typically requiring a small screwdriver or pick to access) and carefully pull the connector straight off the switch terminals. Do not pull on the wires themselves. If connector is tight, gently rock it side-to-side while pulling to release.
5. 5

   Remove ignition switch mounting fasteners
   The ignition switch is secured to the steering column lock housing with Torx screws. Verify the exact screw count and Torx size against Aston Martin service documentation before removal. Support the switch assembly with one hand while removing the final fastener to prevent it from falling. Note: The ignition switch is secured to the steering column lock housing with mounting screws. Verify the exact screw count and Torx size against Aston Martin service documentation before removal. Note: The ignition switch is secured to the steering column lock housing with mounting screws. Verify the exact fastener count and Torx bit size against Aston Martin service documentation before removal. Note: Unknown — verify exact Torx size against Aston Martin 2009 DB9 service documentation
6. 6

   Remove ignition switch from column
   With fasteners removed, carefully pull the ignition switch assembly away from the steering column. The switch may have a locating pin or alignment tab that fits into the column lock housing - gently rotate or wiggle the switch to disengage these features. Note the position of any alignment features for installation of the new switch.
7. 7

   Prepare new ignition switch for installation
   Remove new ignition switch from packaging and verify it matches the removed component in connector type, mounting hole positions, and overall configuration. If the switch has an adjustable actuator rod or cam, set it to match the position of the old switch. Ensure the switch is in the OFF position.
8. 8

   Install new ignition switch assembly
   Align the new ignition switch with the mounting holes and any locating pins on the steering column lock housing. Ensure the actuator mechanism properly engages with the lock cylinder cam. Insert the switch into position, verifying proper alignment before installing fasteners. The switch should sit flush against the column housing without gaps. Note: Switch Mounting Screws — torque value to be confirmed against Aston Martin service documentation (not available in this procedure)
   Torque spec

   Switch Mounting Screws5 Nm (4 lb-ft)
9. 9

   Secure ignition switch mounting fasteners
   Install the Torx mounting screws finger-tight, then torque to the Aston Martin specified value using a torque wrench (verify count and torque spec against service documentation). Tighten screws in a cross pattern if applicable. After torquing, verify the switch sits firmly against the column with no movement. Note: Install the ignition switch mounting screws finger-tight, then torque to the Aston Martin-specified value using a torque wrench (verify exact spec and screw count against service documentation). Note: Install the Torx mounting screws finger-tight, then torque to the Aston Martin specified value using a torque wrench (confirm torque spec and fastener count against service documentation).
   Torque spec

   Switch Mounting Screws5 Nm (4 lb-ft)
10. 10

    Reconnect ignition switch electrical connector
    Align the electrical connector with the terminals on the new ignition switch, ensuring correct orientation. Push the connector firmly onto the switch until the locking tab clicks into place. Gently tug on the connector (not the wires) to verify it is fully locked.
11. 11

    Reinstall upper steering column trim
    Position the two halves of the upper steering column shroud around the column, ensuring proper alignment around the ignition cylinder and that no wiring is pinched. Align the mounting holes and install the Torx screws finger-tight. Verify trim fit and gaps are correct, then tighten screws securely but do not overtighten plastic trim fasteners.
12. 12

    Reinstall lower steering column trim
    Position the lower steering column shroud, aligning it with the upper shroud and ensuring all retention clips engage properly. Install the Torx fasteners and tighten securely. Check that all trim pieces are flush and properly seated with consistent gaps.

Reassembly

1. Reconnect battery negative terminal using 10mm socket
2. Verify all trim panels are secure and properly aligned with no gaps or misalignment
3. Ensure no tools or parts were left in the steering column area

Verification

• Without starting the engine, turn ignition key through all positions (LOCK, ACC, ON) and verify smooth operation with proper detents at each position
• Verify all ignition switch position indicators on instrument cluster illuminate correctly in each key position
• Verify steering wheel lock engages when key is removed and turned to LOCK position
• Start engine to confirm ignition switch START position functions correctly
• Test all electrical accessories (radio, windows, climate control) in ACC and ON positions to verify proper switch function
• Check for any warning lights on instrument cluster related to ignition system or security system
• If vehicle has keyless start, verify system recognizes key fob and allows engine start

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