Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001GV87
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2022]
Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (w/o Smart Key System): TERMINALS OF ECU; 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]

TERMINALS OF ECU

CHECK TRANSPONDER KEY ECU ASSEMBLY

(a) Disconnect the I67 transponder key ECU assembly connector.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item / DTC

I67-4 (+B) - I67-12 (GND)

Input

L - W-B

Battery

Always

11 to 14 V

+B

I67-5 (KSW) - I67-12 (GND)

Input

G - W-B

Unlock warning switch signal

No door control transmitter assembly in ignition key cylinder

10 kΩ or higher

  • B2780
  • Key SW

Door control transmitter assembly in ignition key cylinder

Below 1 Ω

I67-12 (GND) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

(c) Reconnect the I67 transponder key ECU assembly connector.

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item / DTC

I67-6 (IG) - I67-12 (GND)

Input

W - W-B

Ignition switch signal

Ignition switch off

Below 1 V

IG SW

Ignition switch ON

11 to 14 V

I67-8 (IND) - I67-12 (GND)

Output

L - W-B

Security indicator light signal

No door control transmitter assembly in ignition key cylinder, or 20 sec. elapsed after turning ignition switch to ACC or off (immobiliser system set)

Pulse generation

Immobiliser

Door control transmitter assembly in ignition key cylinder (immobiliser system unset)

Below 1 V

I67-9 (D) - I67-12 (GND)

Input/Output

LG - W-B

DLC3 communication

Without communication

Below 1 V

-

During communication

Pulse generation

I67-2 (ANT1) - I67-12 (GND)

Input/Output

V - W-B

Transponder key amplifier power source

No door control transmitter assembly in ignition key cylinder

Below 1 V

-

Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder

Pulse generation

(See waveform 1)

I67-3 (ANT2) - I67-12 (GND)

Input/Output

W - W-B

Transponder key amplifier communication signal

No door control transmitter assembly in ignition key cylinder

Below 1 V

-

Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder

Pulse generation

(See waveform 2)

I67-10 (EFII) - I67-12 (GND)

Input

B - W-B

ECM input signal

Ignition switch off

11 to 14 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 3)

I67-11 (EFIO) - I67-12 (GND)

Output

R - W-B

ECM output signal

Ignition switch off

Below 1 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 4)

(e) Using an oscilloscope, check the waveform.

(1) Waveform 1 (Reference)

Tester Connection

I67-2 (ANT1) - I67-12 (GND)

Tool Setting

20 V/DIV., 2 s./DIV.

Condition

Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder

(2) Waveform 2 (Reference)

Tester Connection

I67-3 (ANT2) - I67-12 (GND)

Tool Setting

20 V/DIV., 2 s./DIV.

Condition

Within 3 seconds of inserting door control transmitter assembly into ignition key cylinder

(3) Waveform 3 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

I67-10 (EFII) - I67-12 (GND)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

(4) Waveform 4 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

I67-11 (EFIO) - I67-12 (GND)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

CHECK ECM (for 2ZR-FAE)

(a) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item / DTC

A46-45 (IMO) - C77-59 (E1)

Output

B - W-B

Transponder key ECU assembly communication output

Ignition switch off

11 to 14 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 1)

-

A46-28 (IMI) - C77-59 (E1)

Input

W - W-B

Transponder key ECU assembly communication input

Ignition switch off

Below 1 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 2)

-

(b) Using an oscilloscope, check the waveform.

(1) Waveform 1 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

A46-45 (IMO) - C77-59 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

A46-28 (IMI) - C77-59 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

CHECK ECM (for M20A-FKS)

(a) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item / DTC

A47-25 (IMO) - A47-10 (E1)

Output

B - W-B

Transponder key ECU assembly communication output

Ignition switch off

11 to 14 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 1)

-

A47-26 (IMI) - A47-10 (E1)

Input

W - W-B

Transponder key ECU assembly communication input

Ignition switch off

Below 1 V

-

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

Pulse generation

(See waveform 2)

-

(b) Using an oscilloscope, check the waveform.

(1) Waveform 1 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

A47-25 (IMO) - A47-10 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Tester Connection

A47-26 (IMI) - A47-10 (E1)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Within 3 seconds of starter operation and initial combustion, or within 3 seconds of ignition switch first being turned to ON after cable disconnected and reconnected to negative (-) battery terminal