Component Tests and General Diagnostics

Audio System Inspection

Voltage and Signal Check

1. Remove audio unit or audio amplifier (with connector connected).
- Audio unit:
- Audio amplifier:

2. Check voltage using circuit tester 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 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 for measuring these outputs.






















Reference Waveform

Oscilloscope display
Shown below is typical waveform display provided by oscilloscope function of SUZUKI Scan Tool.

NOTE:
- Display includes the following types of data:







- Waveforms may vary with measurement conditions and vehicle specifications.

Speaker / microphone wave

NOTE: Voltage changes depending on sound volume and quality.



















Measurement condition
- Audio: ON







Illumination ground







Measurement condition
- When clearance lights or headlights are lighting.