Ascender 4WD V8-5.3L (2004)
Keyless Entry: Technical Service Bulletins
Remote Keyless Entry (RKE) - Operational Characteristics
Information IB06-11-S001
Remote 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.
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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.
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Line of sight. The transmitter signal may be obstructed by obstacles; another vehicle, building or other obstructions in the line of sight.
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Proximity to radio towers, airports, police and fire towers.
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The presence of fluorescent lighting.
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Installation of some aftermarket accessories have been known to affect the RKE performance as well.
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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.
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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.
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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:
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The batteries of the keyless entry transmitter have been replaced.
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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.
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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
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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
