Suzuki Vitara (LY) 2016-2017 · Service Manual Diagnostic Information and Procedures

Inspection of Audio System and Its Circuit

Precautions: Precautions for Audio Visual / Navigation · Precautions for Body, Cab and Accessories · General safety (00)

Voltage and Signal Check
1)Remove audio / navigation unit (with connector connected). icon 
2)Check voltage using circuit tester and oscilloscope.
NOTE:
•Check that battery voltage is 11 V or more.
•Outputs from terminals marked with asterisk (*) cannot be measured with voltmeter because they are pulse signals. Use oscilloscope for measuring these outputs.
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[A]: “G231” connector (microphone (if equipped)) (View: [a]) [D]: “G232” connector (rearview camera (if equipped)) (View: [a])
[B]: “G248” connector (audio / navigation unit) (View: [a]) [E]: “G243” connector (navigation unit) (View: [a])
[C]: “G267” connector (radio antenna feeder) (View: [a]) [F]: “G218” connector (AUX connector (if equipped)) (View: [a])
[A] “G231” connector (microphone (if equipped))
Terminal No. Wire color Circuit Normal voltage Condition
G231-1 BLU Ground for microphone Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
G231-2* PNK Microphone signal — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G231-3 BLU Ground for microphone Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
G231-4 YEL Power source for microphone Approx. 5 V Ignition: “ACC” or “ON”
[B] “G248” connector (audio / navigation unit)
Terminal No. Wire color Circuit Normal voltage Condition
G248-1 GRY Power source (Non ENG A-STOP model) Approx. 12 V Ignition: “OFF”, “ACC” or “ON”
LT GRN Power source (ENG A-STOP model) Refer to terminal “E25-5” under Inspection of ENG A-STOP Control Module and Its Circuits.
G248-2 RED Power source (illumination) Approx. 12 V When clearance light is on
Approx. 0 V Other than above condition
G248-3* WHT Front speaker (L) (+), tweeter (L) (+) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-4* RED Front speaker (R) (+), tweeter (R) (+) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-5* GRN Rear speaker (L) (+) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-6* PPL Rear speaker (R) (+) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-8 YEL Steering switch (hands-free switch) Approx. 3.3 V Ignition: “ACC” or “ON”
G248-9 LT GRN Power source (ACC) (Non ENG A-STOP model) Approx. 12 V Ignition: “ACC” or “ON”
Power source (ACC) (ENG A-STOP model) Approx. 12 V Ignition: “ACC”, “ON” or during engine auto start control
G248-11 BLK Ground for audio / navigation unit Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
G248-12* PPL Illumination signal Refer to Inspection of Combination Meter and Its Circuit
G248-13* BLU Front speaker (L) (–), tweeter (L) (–) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-14* YEL Front speaker (R) (–), tweeter (R) (–) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-15* BRN Rear speaker (L) (–) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-16* LT BLU Rear speaker (R) (–) — Audio: “ON”
Refer to reference waveform.
Speaker / microphone wave
G248-18* PPL Vehicle speed signal (audio unit) Refer to Inspection of BCM and Its Circuits.
G248-19 GRN Steering switch (audio control switch) Approx. 3.3 V Ignition: “ACC” or “ON”
G248-20 PNK Ground for steering switch Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
[C] “G267” connector (radio antenna feeder)
Terminal No. Wire color Circuit Normal voltage Condition
G267-1 — Power source for radio antenna amplifier Approx. 12 V Audio: “ACC” or “ON”
G267-2 BLK Radio antenna amplifier signal — —
G267-3 — Radio antenna amplifier shield ground circuit Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
[D] “G232” connector (rearview camera (if equipped))
Terminal No. Wire color Circuit Normal voltage Condition
G232-1 BLK Ground for rearview camera Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
G232-2 — Ground for rearview camera Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
G232-3* RED Rearview image signal input — Audio: “ON”
Shift lever: reverse position
Refer to reference waveform.
Rearview image signal
G232-4 WHT Power source for rearview camera Approx. 6 V Audio: “ON”
Shift lever: reverse position
G232-5 GRY Ground for rearview camera Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
[E] “G243” connector (navigation unit)
Terminal No. Wire color Circuit Normal voltage Condition
G243-1 LT GRN Parking brake switch signal Approx. 0 V Ignition: “ON”
Parking brake lever: pulled up
Refer to Inspection of BCM and Its Circuits.
G243-2 RED Back up light switch signal Approx. 0 V Ignition: “ON”
Shift lever: reverse position
Approx. 12 V Other than above condition
G243-3* PPL Vehicle speed signal Refer to Inspection of BCM and Its Circuits.
[F]: “G218” connector (AUX connector (if equipped))
Terminal No. Wire color Circuit Normal voltage Condition
G218-7 BEG Ground for AUX connector Approx. 0 V Ignition: “OFF”, “ACC” or “ON”
Reference Waveform
Oscilloscope display
Shown below is typical waveform display provided by oscilloscope.
NOTE:
•Display includes the following types of data:
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[a]: Waveform of channel 1 [c]: VOLT/DIV of each channel
[b]: Ground level of each channel [d]: TIME/DIV
•Waveform varies depending on measurement condition and vehicle spec.
Speaker / microphone wave
NOTE:
Voltage changes depending on sound volume and quality.
Microphone signal
Channel Probe Terminal No.
1 + G231-2
– G231-3
Speaker signal
Channel Probe Terminal No.
1 + Front speaker (L): G248-3
Front speaker (R): G248-4
Rear speaker (L): G248-5
Rear speaker (R): G248-6
– Front speaker (L): G248-13
Front speaker (R): G248-14
Rear speaker (L): G248-15
Rear speaker (R): G248-16
Measurement condition
•Audio: ON
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1. Speaker / microphone signal
Rearview image signal
Channel Probe Terminal No.
1 + G232-3
– G232-5
Measurement condition
•Audio: ON
•Shift lever: reverse position
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