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Keyless Entry Receiver and Its Circuit Inspection

Check that the voltage between the following terminals and body ground are specifications under each conditions. If check result is not as specified, check applicable circuit for open or short. If circuit is normal, proceed to next step.

Fig 1: Checking Voltage Between Keyless Entry Receiver Connector Terminals
Courtesy of SUZUKI OF AMERICA CORP.

Terminal	Circuit	Specification	Condition
L44-1	Power source	Figure [A]	Push "Lock" or "Unlock" button on transmitter.
L44-1	Power source	0 - 1 V	Except the above-mentioned condition.
L44-3	Lock/Unlock output signal circuit	Figure [A]	Push "Lock" or "Unlock" button on transmitter.
L44-3	Lock/Unlock output signal circuit	0 - 1 V	Except the above-mentioned condition.
L44-4	Ground	0 - 1 V	-

Oscilloscope setting

CH1: 2V/DIV

CH2: 2V/DIV

TIME: 200 ms/DIV

Fig 2: Power Source And Lock/Unlock Out Put Signal Waveform

G08899646

Courtesy of SUZUKI OF AMERICA CORP.

Recheck keyless entry receiver as follows.
1. Substitute a known-good keyless entry receiver.
2. Record key code referring to PROGRAMMING TRANSMITTER CODE FOR KEYLESS ENTRY SYSTEM (OTHER THAN KEYLESS START MODEL) .
3. Recheck keyless entry receiver system.