RM3660EC _59 Vehicle Exterior _139017 ACOUSTIC VEHICLE ALERTING SYSTEM _0582455 ACOUSTIC VEHICLE ALERTING SYSTEM U

ACOUSTIC VEHICLE ALERTING SYSTEM  ACOUSTIC VEHICLE ALERTING SYSTEM  TERMINALS OF ECU  


CHECK VEHICLE APPROACHING SPEAKER CONTROLLER


E504125N04
2.063,0.75 2.458,1.01 0.396,0.26 2.135,0.813 2.594,1.01 0.458,0.198 10 false I204

a.

Disconnect the I204 vehicle approaching speaker controller connector.


b.

Measure the voltage and resistance according to the value(s) in the table below.

Terminal No. (Symbol) Terminal Description Condition Specified Condition
I204-7 (+B) - Body ground Power source Ignition switch off 11 to 14 V
I204-12 (GND) - Body ground Ground Always Below 1 Ω


c.

Connect the I204 vehicle approaching speaker controller connector.


d.

Check the signal waveform and check for pulses according to the condition(s) in the table below.

Terminal No. (Symbol) Terminal Description Condition Specified Condition
I204-3 (SP+) - I204-4 (SP-) Vehicle approaching speaker assembly output Vehicle approaching speaker assembly operating A waveform synchronized with the sound is output.
(See Waveform)
I204-1 (CANH) - I204-12 (GND) CAN communication line Ignition switch ON Pulse generation
I204-2 (CANL) - I204-12 (GND) CAN communication line Ignition switch ON Pulse generation

i.
E403623

Waveform

Item Condition
Tester Connection I204-3 (SP+) - I204-4 (SP-)
Tool Setting 1 V/DIV., 500 ms./DIV.
Condition Vehicle approaching speaker assembly operating