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Home >> Isuzu >> 2008 >> Ascender LS, RWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Keyless Entry System & Remote Functions >> Diagnostic Information & Procedures >> Keyless Entry System Inoperative >> Circuit/System Verification
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Circuit/System Verification

  1. Verify that the transmitter is the correct transmitter for the vehicle.
    • If not the correct transmitter, replace the transmitter.
  2. Verify the scan tool Fob Battery parameter for the appropriate keyless entry transmitter is OK.
    • If no the specified value, replace the transmitter battery.
  3. Verify the scan tool Fob Programmed parameter for the appropriate keyless entry transmitter is Yes.
  4. Place the transmitter on the test pad of the J 43241  and press each button of the transmitter one at a time. See Special Tools . The tester should sound a tone and illuminate a green light when each button is pressed.
    • If one or more buttons does not sound the tone and illuminate the green light, replace the transmitter.
  5. Operate the transmitter while observing the scan tool Last Fob Button Pressed parameter. The parameter should correspond with the function selected on the transmitter.
    • If the parameter does not match the function selected on the transmitter, replace the transmitter.
  6. If all circuits test normal, replace the LGM.
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