Component Tests and General Diagnostics

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.
- Outputs from terminals marked with asterisk (*) cannot be measured with voltmeter because they are pulse signals. Use oscilloscope function of SUZUKI scan tool 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"