Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000024XS5
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: ACOUSTIC VEHICLE ALERTING SYSTEM: ACOUSTIC VEHICLE ALERTING SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

TERMINALS OF ECU

CHECK VEHICLE APPROACHING SPEAKER CONTROLLER

(a) Disconnect the I158 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

I158-7 (+B) - Body ground

Power source

Ignition switch off

11 to 14 V

I158-12 (GND) - Body ground

Ground

Always

Below 1 Ω

(c) Connect the I158 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

I158-3 (SP+) - I158-4 (SP-)

Vehicle approaching speaker assembly output

Vehicle approaching speaker assembly operating

A waveform synchronized with the sound is output.

(See Waveform)

I158-1 (CANH) - I158-12 (GND)

CAN communication line

Ignition switch ON

Pulse generation

I158-2 (CANL) - I158-12 (GND)

CAN communication line

Ignition switch ON

Pulse generation

(1) Waveform

Item

Condition

Tester Connection

I158-3 (SP+) - I158-4 (SP-)

Tool Setting

1 V/DIV., 500 ms./DIV.

Condition

Vehicle approaching speaker assembly operating