Inspection of Power Window Master Switch and Its Circuit

Inspection of Power Window Master Switch and Its Circuit

Voltage and Signal Check

1) Remove door trim and power window master switch. Front Door Components
2) Connect connector to power window master switch and push engine switch to change ignition mode of keyless start system to "ON" or start engine.
3) Check terminal voltages and waveforms using voltmeter and oscilloscope.

NOTE:

- Confirm that battery voltage is 11 V or more.
- An "ignition mode" in the following table represents a power supply mode available with the keyless 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 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.

Illumination GND





Measurement condition

- When clearance lights or headlights are lighting.






LIN communication





Measurement condition

- Ignition mode: ON