Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK TRANSPONDER KEY ECU ASSEMBLY

(a) Disconnect the F22 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.

Tester Connection

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item

F22-1 (+B) - F22-5 (GND)

Input

W - W-B

Battery

Always

11 to 14 V

+B

F22-2 (IG) - F22-5 (GND)

Input

B - W-B

Ignition switch signal

Ignition switch off

Below 1 V

IG SW

Ignition switch ON

11 to 14 V

F22-3 (KSW) - F22-5 (GND)

Input

V - W-B

Unlock warning switch signal

No key in ignition key cylinder

10 kΩ or higher

Key SW/B2780

Key in ignition key cylinder

Below 1 Ω

F22-5 (GND) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the F22 transponder key ECU assembly connector.

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

Tester Connection

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item

F22-8 (IND) - F22-5 (GND)

Output

P - W-B

Security indicator signal

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

Pulse generation

Immobiliser

Key in ignition key cylinder (immobiliser system unset)

Below 1 V

F22-9 (D) - F22-5 (GND)

Input/Output

SB - W-B

DLC3 communication

Without communication

Below 1 V

-

During communication

Pulse generation

F22-4 (ANT1) - F22-5 (GND)

Input/Output

V - W-B

Transponder key amplifier power source

No key in ignition key cylinder

4 to 6 V

-

Within 3 seconds of inserting key into ignition key cylinder

Pulse generation

(See waveform 1)

F22-15 (ANT2) - F22-5 (GND)

Input/Output

W - W-B

Transponder key amplifier communication signal

No key in ignition key cylinder

4 to 6 V

-

Within 3 seconds of inserting key into ignition key cylinder

Pulse generation

(See waveform 2)

F22-12 (EFII) - F22-5 (GND)

Output

G - W-B

ECM input signal

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)

-

F22-13 (EFIO) - F22-5 (GND)

Input

R - W-B

ECM output signal

Ignition switch off

Below 1 V

-

Ignition switch ON

Pulse generation

(See waveform 4)

If the result is not as specified, the transponder key ECU assembly may be malfunctioning.

(e) Using an oscilloscope, check the waveform.

(1) Waveform 1 (Reference)

Tester Connection

F22-4 (ANT1) - F22-5 (GND)

Tool Setting

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

Condition

Within 3 seconds of inserting key into ignition key cylinder

(2) Waveform 2 (Reference)

Tester Connection

F22-15 (ANT2) - F22-5 (GND)

Tool Setting

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

Condition

Within 3 seconds of inserting key into ignition key cylinder

(3) Waveform 3 (Reference)

*a

Approximately 160 ms

*b

Approximately 270 ms

Tester Connection

F22-12 (EFII) - F22-5 (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

F22-13 (EFIO) - F22-5 (GND)

Tool Setting

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

Condition

Ignition switch ON

CHECK ECM

(a) Measure the voltage and resistance, 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

C63-59 (E1) - Body ground

-

W-B - Body ground

Ground

Always

Below 1 Ω

-

A38-45 (IMO) - C63-59 (E1)

Output

GR - W-B

ID code box (immobiliser code ECU) communication output

Ignition switch off

11 to 14 V

-

A38-45 (IMO) - C63-59 (E1)

Output

GR - W-B

ID code box (immobiliser code ECU) communication output

Within 3 seconds of engine start or within 3 seconds of ignition switch turned ON after cable disconnected and reconnected to battery

Pulse generation

(See waveform 1)

-

A38-28 (IMI) - C63-59 (E1)

Input

BE - W-B

ID code box (immobiliser code ECU) communication input

Ignition switch off

11 to 14 V

-

A38-28 (IMI) - C63-59 (E1)

Input

BE - W-B

ID code box (immobiliser code ECU) communication input

Ignition switch turned ON using registered electrical key transmitter sub-assembly

Pulse generation

(See waveform 2)

-

(b) Using an oscilloscope, check the waveform.

NOTICE:

The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

(1) Waveform 1 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

A38-45 (IMO) - C63-59 (E1)

Tool Setting

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

Condition

Within 3 seconds of engine start or within 3 seconds of ignition switch turned ON after cable disconnected and reconnected to battery

(2) Waveform 2 (Reference)

*a

Approximately 160 ms.

*b

Approximately 270 ms.

Measurement Condition

Item

Content

Tester Connection

A38-28 (IMI) - C63-59 (E1)

Tool Setting

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

Condition

Ignition switch turned ON using registered electrical key transmitter sub-assembly

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