Description
The vehicle is equipped with an engine immobilizer system that prevents the vehicle from operating until the appropriate key is used. This system consists of a pulse transceiver located in the ignition key, a receiver, a control unit, an indicator lamp, and an ECM/PCM.
The machine is equipped with two types of keys:
Control key for:
- Ignition switch
- Door locks
- Rear door/trunk lock
The recording key is designed to rewrite the engine immobilizer system code.
Note: This key cannot start the engine, do not use it for any purpose other than rewriting the immobilizer code.
When the key is inserted into the ignition switch and turned to the ON(II) position, the starter interlock control unit sends power to the pulse transceiver via the receiver in the key slot. The transceiver then sends a coded signal via the receiver to the control unit. The control unit transmits signals to the ECM/PCM as well as to the starter interlock relay.
- If the correct key is used, the starter lock relay will be energized and the ECM/PCM will start the fuel injection system. At the same time, the lock indicator lamp on the instrument panel will come on for about 2 seconds and then go out, confirming that the lock control unit has recognized the code sent by the transceiver.
- If a key is used whose code has not been received or recognized by the control unit, or a key not approved by Honda, the indicator lamp will come on for approximately 2 seconds, then flash continuously.
- If the ignition switch is turned OFF, the indicator will flash for approximately 5 seconds to confirm that the unit has been installed correctly, then the indicator will turn off.
Flashing pattern of the lock indicator lamp
Note:
- The locking system can store up to 5 key codes in its memory.
- To rewrite, the dealer must have the customer's vehicle, a key controller, a key writer, and a Honda PGM tester equipped with an engine immobilizer software card.
Replaceable and defective parts:
Set of parts:
- A: Clean key
- B: Signal receiver
- C: Locking system control unit; Control key; Recording key
- D: Ignition lock system receiver; Control unit of the locking system; Control key; Recording key
- E: ECM/RSM
- F: Door key cylinders; Control keys for opening/closing doors
- G: Ignition switch with receiver of the locking system; Control key; Recording key; Door key cylinders; Trunk/Rear Door Key Cylinder
Before starting the check:
- Due to the operation of the engine immobilizer system, the engine takes longer to start than the engine in a car without an immobilizer system.
- When the system is operating normally and the correct key is inserted, the indicator lamp lights up for 2 seconds and then goes out.
- If the indicator starts flashing after 2 seconds or if the engine does not start, try starting it again.
- If the engine still does not start, perform a test of the immobilizer control unit input signal and a test of the immobilizer transceiver and receiver.
- If the input signal, transceiver, and immobilizer receiver tests are normal, check the ECM/PCM.
- If ECM/PCM is OK, lock control module is faulty, replace lock control module, master key and writing key at the same time. Then rewrite ECM/PCM with Honda PGM tester.
- If the ECM/PCM is faulty, install a known good ECM/PCM and check again. However, since the ECM/PCM has a different code stored in its memory, it must be rewritten with the Honda PGM tester. Otherwise, the engine will not start.
Checking the input signal of the control unit
1. Disconnect the 8K connector "A" from the control unit.
2. Inspect the connectors and socket contacts to ensure that they are in good contact.
- If the contacts are bent, loose or corroded, correct them and retest the system.
- If the contacts are OK, perform the following tests on the input signal at the connector.
- If any of the tests identify a problem, find and correct the cause, then test the system again.
- If all input signal tests are positive, check the receiver and transceiver.
Replacing the lock receiver
1. Remove the lower instrument panel cover on the driver's side.
2. Remove the steering column covers.
3. Disconnect the 3K connector from the control unit.
4. Remove the receiver screw, then turn the receiver 45° counterclockwise and remove it from the ignition key cylinder.
- If necessary, disconnect the connector from the receiver.
5. Install in the reverse order of removal.
Note: Since this wiring is a communication connection, please install carefully.
6. After replacement, check the locking system.