Acura Service Bulletin 00-013
Date: July 25, 2007
Applies To: 1996–2004 Acura 3.5RL – ALL
1997–2005 Acura NSX – ALL
Immobilizer System (Type 1)
This bulletin explains the operation, components, key programming procedures, and troubleshooting for the Type 1 immobilizer system used on these vehicles. It also outlines what to do when keys are lost, when modules are replaced, and how to temporarily start the engine without a programmed key.
Warranty Claim Information
No warranty claim procedures apply; this bulletin is informational.
Immobilizer System Components
The system includes master keys, a valet key, a learning key, an indicator, a receiver, a control unit, and the ECM/PCM. Each component plays a role in verifying the key’s transponder code before allowing the engine to start.
Immobilizer System Indicator
The indicator shows system status when a key is inserted. Programmed keys cause normal illumination; unprogrammed keys cause blinking and prevent engine cranking.
Immobilizer Receiver
The receiver energizes the key’s transponder and sends its ID code to the control unit. It contains no logic and does not require programming when replaced.
Immobilizer Control Unit
The control unit verifies transponder codes, controls the starter cut relay, and communicates with the ECM/PCM to authorize engine start.
ECM/PCM
The ECM/PCM must recognize the immobilizer control unit’s serial code. Both modules must mutually authenticate before fuel and ignition systems are enabled.
Consequences of a Lost Key
The bulletin outlines several scenarios involving lost programmed keys or learning keys. Depending on what is missing, the immobilizer control unit may need replacement, or key‑adding capabilities may be limited.
Adding Programmed Ignition Keys
Keys can be added using either:
- The Ilco Immobilizer Key Code Duplicator (preferred)
- The Honda Diagnostic System (HDS), which rewrites the immobilizer control unit
Detailed preparation steps and programming sequences are provided in the bulletin.
Clearing Transponder Codes of Lost Keys
If a client loses one or more programmed keys, the immobilizer control unit should be rewritten using the HDS so that lost keys can no longer start the engine.
Starting the Engine Without a Programmed Ignition Key
A temporary start procedure is available using a cut non‑transponder key and the Immobilizer Brake/Access Code. This allows the vehicle to be driven directly to a dealership for repair.
Replacing the Immobilizer Control Unit
When the control unit is replaced, it must be rewritten with the HDS so it can recognize the vehicle’s programmed keys and communicate with the ECM/PCM.
Replacing the ECM/PCM
After ECM/PCM replacement, the module must be rewritten with the HDS to synchronize immobilizer serial codes. The idle learn procedure must then be performed.
Client Situation and Required Items Chart
The bulletin includes a detailed chart listing common immobilizer‑related situations and the required tools, keys, and procedures for each. This includes lost keys, faulty components, and lock cylinder issues.
| Client Situation | Required Items |
|---|---|
| Client wants additional keys | Key duplicator or HDS, learning key, programmed keys, key blanks |
| Client lost a programmed key | Learning key, remaining keys, HDS |
| Client lost all programmed keys | Immobilizer unit set, key cutter, HDS |
| Learning key inserted accidentally | Immobilizer unit set, keys, HDS |
| Immobilizer control unit faulty | Immobilizer unit set, keys, HDS |
| Immobilizer receiver faulty | Steering lock assembly |
| ECM/PCM faulty | Replacement ECM/PCM, one programmed key, HDS |
| Ignition key cylinder faulty | Steering lock assembly or key cylinder set |
| Other locks damaged | Key cylinder set |
Customer Information: This bulletin is intended for trained technicians with proper tools and equipment. Clients should consult an authorized Acura dealer for diagnosis and repair.
