Description
The vehicle is equipped with an engine immobilizer system that prevents the vehicle from operating until the correct 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 writing 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 lock system code.
When the key is inserted into the ignition and turned to ON (II) position, the locking control unit sends power to the pulse transceiver through the receiver in the key socket. The transceiver then sends the encoded signal through 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 has been applied, the starter disable relay will be energized and the ECM/PCM will start the fuel system. At the same time, the lock indicator lamp on the instrument panel will light up for approximately 2 seconds and then go out, confirming that the lock control unit has recognized the code sent by the transceiver.
- If a key whose code has not been received or recognized by the control unit or a key not approved by Honda has been used, the indicator lamp will light up for approximately 2 seconds and then flash continuously.
- If the ignition switch is turned off (OFF), the indicator will flash for approximately 5 seconds to confirm that the unit has been installed correctly, then the indicator will turn off.
Sample of lock indicator lamp flashing signals
Note:
- The locking system can store up to 5 key codes.
- To rewrite, the dealer must have the customer's car, a control key, a recording key and a Honda PGM tester equipped with an engine immobilizer system program card.
Replaceable and faulty parts:
Set of parts:
- A: Blank key
- B: Signal receiver
- C: Locking system control unit; Control key; Recording key
- D: Ignition lock system receiver; Locking system control unit; Control key; Recording key
- E: ECM/PCM
- F: Door key cylinders; Control keys for opening/closing doors
- G: Ignition switch with locking system receiver; Control key; Recording key; Door key cylinders; Trunk/rear door key cylinder
Before starting the test:
- Due to the engine immobilizer system, the engine takes longer to start than the engine in a car without an engine immobilizer system.
- When the system is operating normally and the appropriate key is inserted, the indicator lamp lights up for 2 seconds and then goes off.
- If the indicator starts flashing after 2 seconds or if the engine does not start, try starting again.
- If the engine still does not start, check the interlock control module input signal and check the interlock transceiver and receiver.
- If the input signal, transceiver, and interlock receiver tests are positive, check the ECM/PCM.
- If the ECM/PCM is OK, the lock control module is faulty, replace the lock control module, control key and recording key at the same time» Then rewrite the ECM/PCM using a Honda PGM tester.
- If the ECM/PCM is faulty, install a known good ECM/PCM and check again. However, since the ECM/PCM stores a different code, it must be rewritten using a Honda PGM tester. Otherwise, the engine will not start.
Checking the control unit input signal
1. Disconnect the connector "A" 8K from the control unit.
2. Inspect the connectors and contacts of the sockets to make sure that they are in reliable contact.
- If the pins are bent, loose or corroded, repair them and check the system again.
- If the pins are OK, perform the following tests on the input signal at the connector.
- If any of the tests indicate 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 driver's side lower dashboard cover.
2. Remove the steering column covers.
3. Disconnect the 3K connector from the control unit.
4. Remove the receiver screw, then rotate 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, install carefully.
6. After replacement, check the locking system.