Daytime Running Lamp Control Unit: Testing and Inspection

Inspection of DRL Control Module and Its Circuit

Voltage and Signal Check

Check each terminal voltage and output waveform using voltmeter and oscilloscope function of SUZUKI scan tool.

NOTE:

- Check that battery voltage is 11 V or more.
- An "ignition mode" in the following table represents a power supply mode available with the keyless push start system. For more details, refer to Description of Keyless Engine Start Function Description of Keyless Engine Start Function.
- Outputs from terminals marked with asterisk (*) cannot be measured with voltmeter because they are pulse signals. Use oscilloscope for measuring these outputs.















Reference Waveform

Oscilloscope display

Shown below is typical waveform display provided by oscilloscope.

NOTE:

- Display includes the following types of data:










- Waveforms may vary with measurement conditions and vehicle specifications.

DRL signal





Measurement condition

- Engine: Idle speed
- Parking brake: Released
- Lighting switch: "OFF"

Headlight (HI) signal





Measurement condition

- Engine: Idle speed
- Parking brake: Released
- Lighting switch: "OFF"






Headlight (L) (HI) output





Measurement condition

- Engine: Idle speed
- Parking brake: Released
- Lighting switch: "OFF"

Headlight (R) (HI) output





Measurement condition

- Engine: Idle speed
- Parking brake: Released
- Lighting switch: "OFF"