Remote Keyless Entry (RKE) - Operational Characteristics
Information IB06-11-S001Remote Keyless Entry (RKE) Operational Characteristics
ISSUE DATE: FEBRUARY 09, 2006
Affected Vehicles
2003-2006 Isuzu Ascender (US/UT)
2006 Isuzu i-280/i-350 (TI)
Service Information
The Remote Keyless Entry (RKE) system operates on high frequency radio signals. Therefore, they may be subject to radio signal interference which will affect RKE operation. Some of the typical conditions which result in reduced RKE transmitter operation are listed below.
^ If on the second press of the unlock button, all doors are not unlocked, it may be due to the time delay needed by the system to recognize the second press of the unlock button. In order to unlock all doors, press the unlock button once, pause 1-2 seconds and press the unlock button the second time.
IMPORTANT:
There needs to be a pause between button presses so that the receiver can properly process the signal from the transmitter.
^ Line of sight. The transmitter signal may be obstructed by obstacles; another vehicle, building or other obstructions in the line of sight.
^ Proximity to radio towers, airports, police and fire towers.
^ The presence of fluorescent lighting.
^ Installation of some aftermarket accessories have been known to affect the RKE performance as well.
^ Some brands of radar detectors, CB radios, walkie talkies, mobile radios, cell phone chargers and cell phones (especially 3-watt bag phones which are placed on the floor of the vehicle) have jammed the radio frequencies of the RKE system.
^ Remember, these devices do not have to be in the customer's vehicle. They may be in another vehicle which is in close proximity. However, if the customer has one of these devices in their vehicle and if the RKE system works with these aftermarket devices unplugged, refer the customer to the aftermarket supplier. The aftermarket device may not meet the requirements of the FCC Code.
If the customer comments that the remote transmitter fails to operate, press each button on the transmitter one at a time while observing the vehicle systems.
^ If only the panic button works, or the transmitter fails to operate, re-synchronize the system, following the transmitter synchronization procedure found in the Keyless Entry sub-section of Body & Accessories in the Service Manual. If the RKE system is auto-synchronized, reprogram the transmitter following the procedures in the Keyless Entry sub-section of the Service Manual.
IMPORTANT:
Do Not replace any components.
IMPORTANT:
Re-synchronization must be performed if the following conditions exist:
^ The batteries of the keyless entry transmitter have been replaced.
^ A keyless entry transmitter is malfunctioning.
If all of the transmitter buttons fail to function, check the battery and transmitter using the Kent Moore J-43241 Keyless Entry Tester.
^ If the transmitter passes the test, program the RKE system following the procedures in the Keyless Entry sub-section of Body & Accessories in the Service Manual.
IMPORTANT:
Remember when programming the system, all transmitters for the vehicle must be present for the programming to be successful
^ RKE transmitter commands can be viewed using a scan tool on Ascenders under Liftgate Module Data Displays and on i-280/i-350 under Body Control Module, Key FOB Information.
^ If the transmitter fails the test with the Kent Moore J-43241 Keyless Entry Tester, replace the batteries and retest the transmitter using the Kent Moore J43241 Keyless Entry Tester. If the transmitter still fails the test, replace the transmitter.
THE FOLLOWING CLAIM TYPES ARE NOT COVERED UNDER THE VEHICLE WARRANTY:
^ Transmitter replacement when all buttons work, using the Kent Moore J-43241 Keyless Entry Tester.
^ Personalization programming through the DTC or Tech 2.
^ Lost/replacement transmitter reprogramming
^ Used car transmitter replacement programming.
^ Transmitter damage due to misuse, such as any liquid spilled on/in the transmitter or damage from animals chewing on the transmitter, etc.
Broken transmitter cases where the key ring attaches to the case. If the case is broken in this area, it is due to mounting the transmitter direct to the key ring without the protection of the small ring. The small ring acts like a universal joint/flex joint and helps protect the transmitter from this type of damage.
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