RM38N0EC _59 Vehicle Exterior _111868 ACOUSTIC VEHICLE ALERTING SYSTEM _0499572 ACOUSTIC VEHICLE ALERTING SYSTEM U

ACOUSTIC VEHICLE ALERTING SYSTEM  ACOUSTIC VEHICLE ALERTING SYSTEM  TERMINALS OF ECU  


CHECK VEHICLE APPROACHING SPEAKER CONTROLLER


B345454E24
3.302,0.094 3.854,0.354 0.552,0.26 3.458,0.146 4.177,0.375 0.719,0.229 10 false A86

a.

Disconnect the A86 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
A86-1 (IG) - Body ground IG power supply Ignition switch ON 11 to 14 V
Ignition switch off Below 1 V
A86-6 (GND) - Body ground Ground Always Below 1 Ω


c.

Connect the A86 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
A86-7 (SP+) - A86-8 (SP-) Vehicle approaching speaker assembly output Vehicle approaching speaker assembly operating A waveform synchronized with the sound is output.
(See Waveform)
A86-3 (CANH) - A86-6 (GND) CAN communication line Ignition switch ON Pulse generation
A86-4 (CANL) - A86-6 (GND) CAN communication line Ignition switch ON Pulse generation

i.
E403623

Waveform

Item Condition
Tester Connection A86-7 (SP+) - A86-8 (SP-)
Tool Setting 1 V/DIV., 500 ms./DIV.
Condition Vehicle approaching speaker assembly operating