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KENWOOD GX201SEF2
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of KENWOOD GX201SEF2 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 13 (click to view)
GX-201KEF2/LEF2/REF2/SEF2
SECURITY CODE (GX-201REF2)
The audio security system has been set for GX-201REF2 and GX-201RHF2. As a result of confirmation, if the code is judged to be authentic, the system goes into normal operation. However, if the code is not judged to be authentic, then the system goes into the Security mode.

â Security Function
Security is released when an agreement is found between the data from the immobilizer, which is sent from the vehicle, and the data that are set beforehand. The interrelationship in the security system is shown in the chart below.
BU ON Registration Code confirmation mode NG Non-registration

â Security Mode
The system goes into the Security mode when the Immobi code is not judged to be authentic when it is compared with the Security code registered in the audio unit. When this happens, the unit can be operated for an hour. After the elapse of an hour, the power on the unit is cut off and operation is forcefully stopped. Also, in the Non-registration mode, if an hour elapses, the system will go into the Security mode. In the Security mode, the power on the unit is cut off and operation is forcefully stopped. Note : When working on a unit to repair it, the repair would should be conducted in the one hour effective time. After the elapse of an hour, the power on the unit is cut off. If the power is put on again, another hour will be given to operate on.

Confirmation mode OK Normal operation

Non-registration mode Security mode Registration mode

Delete mode Re-Registration

â Code Confirmation Mode
This mode is for judging whether the Security code is registered or not in the audio unit. When the unit is reset, the operation will start from the Current mode. ⢠The registration condition of the Security code can be grasped using the E2PROM. ⢠The Security code is not registered or when abnormalities detected with E2PROM, the system will move to Non-registration mode. ⢠When registering a Security code, the system will move to Confirmation mode. ⢠Conditions of the audio unit during the Security mode Power off. Display light off. Keys do not work (Except the EJECT Key). Audio power off (No voice output). Switching on TV sources not possible. ( Key operation from the monitor not possible.) Voice interruption/switching from NAVI and hands-free unit not possible. In the Security mode, the display is not lighted and when there is an input from any of the key, âSECURITYâ will be displayed.

â Non-Registration Mode
Thus system will move to the Non-registration mode, when the Security code is not registered for an audio unit. Even if the Security code is not resisted, operation is possible for an hour. However, there is a certain limitations placed on the operation. Using this time, production and a variation on the products will be conducted.

â Delete Mode
The system goes in the Delete mode, when the âRequesting Deleteâ condition of the Integrated ECU operating condition signal from the Integrated ECU is obtained by the A/C ECU via low-speed CAN into the gateway and it is sent to the audio unit via UART. The Delete mode is positioned as a Test mode and detailed input methods are not disclosed. The Security code recorded into the E2PROM in the Registration mode and Re-registration mode is cleared in the Delete mode and non-registration condition is obtained. Note : When a linked product is repaired, the security code must be deleted when the repair work is completed. For GX-201, in order to maintain the security, deletion is only effective when selection monitor is used.

â Confirmation Mode
The system will automatically go into the Confirmation mode, when the Security code is confirmed to be adjusted to in the Code confirmation mode. When the A/C ECU is obtained Through CAN from the Integrated ECU on the vehicle side, it goes into the gateway. The Immobi code sent to the audio unit by UART and the Security code registered on the audio unit is compared.

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