- B2780
- Key SW
| Last Modified: 06-02-2026 | 6.11:8.1.0 | Doc ID: RM100000001G22Z |
| Model Year Start: 2019 | Model: RAV4 | Prod Date Range: [11/2018 - ] |
| Title: THEFT DETERRENT / KEYLESS ENTRY: IMMOBILISER SYSTEM (for Gasoline Model without Smart Key System): TERMINALS OF ECU; 2019 - 2025 MY RAV4 [11/2018 - ] | ||
TERMINALS OF ECU
1. CHECK TRANSPONDER KEY ECU ASSEMBLY
(a) Disconnect the G52 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 |
|---|---|---|---|---|---|---|
|
G52-4 (+B) - G52-12 (GND) |
Input |
LA-GR - LA |
Battery |
Always |
11 to 14 V |
+B |
|
G52-5 (KSW) - G52-12 (GND) |
Input |
B - LA |
Unlock warning switch signal |
No door control transmitter assembly in ignition key cylinder |
10 kΩ or higher |
|
|
Door control transmitter assembly in ignition key cylinder |
Below 1 Ω |
|||||
|
G52-6 (IG) - G52-12 (GND) |
Input |
L - LA |
Ignition switch |
Ignition switch off |
Below 1 V |
IG SW |
|
Ignition switch ON |
11 to 14 V |
|||||
|
G52-12 (GND) - Body ground |
- |
LA - Body ground |
Ground |
Always |
Below 1 Ω |
- |
(c) Reconnect the G52 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 |
|---|---|---|---|---|---|---|
|
G52-8 (IND) - G52-12 (GND) |
Output |
W - LA |
Security indicator light signal |
No door control transmitter assembly in ignition key cylinder, or 20 seconds. 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 |
|||||
|
G52-9 (D) - G52-12 (GND) |
Input/Output |
P - LA |
DLC3 communication |
Without communication |
Below 1 V |
- |
|
During communication |
Pulse generation |
|||||
|
G52-2 (ANT1) - G52-12 (GND) |
Input/Output |
R - LA |
Transponder key coil 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) |
|||||
|
G52-3 (ANT2) - G52-12 (GND) |
Input/Output |
W - LA |
Transponder key coil 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) |
|||||
|
G52-10 (EFII) - G52-12 (GND) |
Input |
LG - LA |
EFI communication input (Signal input from ECM to transponder key ECU assembly) |
Ignition switch off |
11 to 14 V |
- |
|
G52-10 (EFII) - G52-12 (GND) |
Input |
LG - LA |
EFI communication input (Signal input from ECM to transponder key ECU assembly) |
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 3) |
|
|
G52-11 (EFIO) - G52-12 (GND) |
Output |
L - LA |
EFI communication output (Signal output from transponder key ECU assembly to ECM) |
Ignition switch off |
Below 1 V |
- |
|
G52-11 (EFIO) - G52-12 (GND) |
Output |
L - LA |
EFI communication output (Signal output from transponder key ECU assembly to ECM) |
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 4) |
(e) Using an oscilloscope, check the waveform.
(1) Waveform 1
|
Tester Connection |
G52-2 (ANT1) - G52-12 (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
|
Tester Connection |
G52-3 (ANT2) - G52-12 (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
|
*a |
Approximately 160 ms. |
*b |
Approximately 270 ms. |
|
Tester Connection |
G52-10 (EFII) - G52-12 (GND) |
|
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 |
(4) Waveform 4
|
*a |
Approximately 160 ms. |
*b |
Approximately 270 ms. |
|
Tester Connection |
G52-11 (EFIO) - G52-12 (GND) |
|
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. CHECK ECM
(a) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
|
Tester Connection |
Wiring Color |
Input/Output |
Terminal Description |
Condition |
Specified Condition |
Related Data List Item |
|---|---|---|---|---|---|---|
|
A24-1 (BATT) - A24-10 (E1) |
G - W-B |
Input |
Power source |
Always |
11 to 14 V |
- |
|
A24-10 (E1) - Body ground |
W-B - Body ground |
- |
Ground |
Always |
Below 1 Ω |
- |
|
A24-25 (IMO) - A24-10 (E1) |
P - W-B |
Output |
EFI communication output (Signal input from ECM to transponder key ECU assembly) |
Ignition switch off |
11 to 14 V |
- |
|
A24-25 (IMO) - A24-10 (E1) |
P - W-B |
Output |
EFI communication output (Signal input from ECM to transponder key ECU assembly) |
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) |
|
|
A24-26 (IMI) - A24-10 (E1) |
R - W-B |
Input |
EFI communication input (Signal output from transponder key ECU assembly to ECM) |
Ignition switch off |
Below 1 V |
- |
|
A24-26 (IMI) - A24-10 (E1) |
R - W-B |
Input |
EFI communication input (Signal output from transponder key ECU assembly to ECM) |
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 2) |
(b) Using an oscilloscope, check the waveform of the ECU.
NOTICE:
The waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
(1) Waveform 1
|
*a |
Approximately 160 ms |
*b |
Approximately 270 ms |
|
Item |
Content |
|---|---|
|
Tester Connection |
A24-25 (IMO) - A24-10 (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
|
*a |
Approximately 160 ms |
*b |
Approximately 270 ms |
|
Item |
Content |
|---|---|
|
Tester Connection |
A24-26 (IMI) - A24-10 (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 |
|
|