CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
Disconnect the A126 and G170 certification ECU (smart key ECU assembly) connectors.
Measure the voltage and resistance according to the value(s) in the table below.
| Tester Connection | Input/Output | Terminal Description | Condition | Specified Condition | Related Data List Item |
|---|---|---|---|---|---|
| G170-29 (E) - Body ground | - | Ground | Always | Below 1 Ω | - |
| G170-6 (+B) - G170-29 (E) | Input | Power supply | Always | 11 to 14 V | - |
| A126-22 (CUTB) - G170-29 (E) | Input | Dark current cut pin* | Always | 11 to 14 V | - |
*: In order to prevent the vehicle battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).
Reconnect the A126 and G170 certification ECU (smart key ECU assembly) connectors.
Measure the voltage and check for pulses according to the value(s) in the table below.
| Tester Connection | Input/Output | Terminal Description | Condition | Specified Condition | Related Data List Item |
|---|---|---|---|---|---|
| A126-11 (IGRD) - G170-29 (E) | Output | IG power supply | Ignition switch off → Ignition switch ON | 1 V or less → 9 V or higher | Power Source Control
Power Supply Condition |
| A126-24 (IGPD) - G170-29 (E) | Output | IG power supply | Ignition switch off → Ignition switch ON | 1 V or less → 9 V or higher | Power Source Control
Power Supply Condition |
| G170-21 (ACCD) - G170-29 (E) | Output | ACC power supply | Ignition switch off → Ignition switch ACC | 1 V or less → 8.5 V or higher | Power Source Control
Power Supply Condition |
| G170-16 (CLG1) - G170-29 (E) | Output | Output to driver door electrical key antenna | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
Pulse generation
(See waveform 1) |
- |
| Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
Pulse generation
(See waveform 2) |
||||
| G170-16 (CLG1) - G170-29 (E) | Input | Input to driver door lock sensor
(front door outside handle assembly LH lock sensor ON signal is sent to the certification ECU (smart key ECU assembly)) |
Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) 5.
Driver door lock sensor touched |
Pulse generation
(See waveform 3) |
Entry&Start
Driver Side Lock Sensor |
| G170-16 (CLG1) - G170-29 (E) | Input | Input to driver door unlock sensor
(when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly)) |
Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors locked 4.
Electrical key transmitter sub-assembly not near the vehicle 5.
Driver door unlock sensor touched |
Pulse generation
(See waveform 4) |
Entry&Start
Driver Side Unlock Sensor |
| G170-15 (CG1B) - G170-29 (E) | Output | Output to driver door electrical key antenna (terminal on opposite side of component from CLG1 output terminal) | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
Pulse generation
(See waveform 5) |
- |
| Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
Pulse generation
(See waveform 6) |
||||
| G170-10 (CLG2) - G170-29 (E) | Output | Output to front passenger door electrical key antenna
(request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area) |
Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
Pulse generation
(See waveform 1) |
- |
| Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
Pulse generation
(See waveform 2) |
||||
| G170-10 (CLG2) - G170-29 (E) | Input | Input to front passenger door lock sensor
(front door outside handle assembly RH lock sensor ON signal is sent to the certification ECU (smart key ECU assembly)) |
Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) 5.
Front passenger door lock sensor touched |
Pulse generation
(See waveform 3) |
Entry&Start
Passenger Side Lock Sensor |
| G170-10 (CLG2) - G170-29 (E) | Input | Input to front passenger door unlock sensor
(when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly)) |
Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors locked 4.
Electrical key transmitter sub-assembly not near the vehicle 5.
Front passenger door unlock sensor touched |
Pulse generation
(See waveform 4) |
Entry&Start
Passenger Side Unlock Sensor |
| G170-9 (CG2B) - G170-29 (E) | Output | Output to front passenger door electrical key antenna (terminal on opposite side of component from CLG2 output terminal) | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
Pulse generation
(See waveform 5) |
- |
| Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
Pulse generation
(See waveform 6) |
||||
| M59-4 (CLG8) - G170-29 (E) | Output | Output to electrical key antenna (outside luggage compartment) | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
Back door opener switch assembly off → on |
Pulse generation
(See waveform 7) |
- |
| M59-3 (CG8B) - G170-29 (E) | Output | Output to electrical key antenna (outside luggage compartment) (terminal on opposite side of component from CLG8 output terminal) | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
Back door opener switch assembly off → on |
Pulse generation
(See waveform 8) |
- |
| M59-16 (TSW5) - G170-29 (E) | Input | Back door opener switch assembly (unlock switch) signal input | Back door opener switch assembly (unlock switch) off → on | Pulse generation
(See waveform 9) |
Entry&Start
Trunk Lid/Back Door Unlock Switch |
| M59-17 (TSW6) - G170-29 (E) | Input | Back door opener switch assembly (lock switch) signal input | Back door opener switch assembly (lock switch) off → on | Pulse generation
(See waveform 9) |
Entry&Start
Trunk Lid/Back Door Lock Switch |
| M59-21 (RCO) - G170-29 (E) | Output | Output to door control receiver
(Power supply for door control receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.) |
Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area 3.
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed |
Pulse generation
(See waveform 10) |
- |
| M59-11 (RDAM) - G170-29 (E) | Input | Door control receiver verifies data received from electrical key transmitter sub-assembly.
Door control receiver sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Door control receiver intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)). |
Procedure:
1.
Ignition switch off 2.
All doors locked 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area 5.
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed |
Pulse generation
(See waveform 11) |
- |
| M59-12 (CSEL) - G170-29 (E) | Output | Communication channel switching circuit | Procedure:
1.
Ignition switch off 2.
All doors closed |
Pulse generation | - |
*: For details about the entry function detection area, refer to Operation Check.
Using an oscilloscope, check the waveform of the ECU.
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
Waveform 1
| Item | Content |
|---|---|
| Tester Connection | G170-16 (CLG1) - G170-29 (E)
G170-10 (CLG2) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
*: For details about the entry function detection area, refer to Operation Check.
Waveform 2
| Item | Content |
|---|---|
| Tester Connection | G170-16 (CLG1) - G170-29 (E)
G170-10 (CLG2) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
*: For details about the entry function detection area, refer to Operation Check.
| *a | Lock sensor not touched |
| *b | Lock sensor touched |
Waveform 3
| Item | Content |
|---|---|
| Tester Connection | G170-16 (CLG1) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 100 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) 5.
Driver door lock sensor touched |
| Item | Content |
|---|---|
| Tester Connection | G170-10 (CLG2) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 100 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) 5.
Front passenger door lock sensor touched |
*: For details about the entry function detection area, refer to Operation Check.
| *a | Unlock sensor not touched |
| *b | Unlock sensor touched |
Waveform 4
| Item | Content |
|---|---|
| Tester Connection | G170-16 (CLG1) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 100 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors locked 4.
Electrical key transmitter sub-assembly not near the vehicle 5.
Driver door unlock sensor touched |
| Item | Content |
|---|---|
| Tester Connection | G170-10 (CLG2) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 100 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors locked 4.
Electrical key transmitter sub-assembly not near the vehicle 5.
Front passenger door unlock sensor touched |
Waveform 5
| Item | Content |
|---|---|
| Tester Connection | G170-15 (CG1B) - G170-29 (E)
G170-9 (CG2B) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought inside detection area*) |
*: For details about the entry function detection area, refer to Operation Check.
Waveform 6
| Item | Content |
|---|---|
| Tester Connection | G170-15 (CG1B) - G170-29 (E)
G170-9 (CG2B) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
All doors closed 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
All doors locked through wireless operation (electrical key transmitter sub-assembly brought outside detection area*) |
*: For details about the entry function detection area, refer to Operation Check.
Waveform 7
| Item | Content |
|---|---|
| Tester Connection | M59-4 (CLG8) - G170-29 (E) |
| Tool Setting | 2 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
Back door opener switch assembly off → on |
Waveform 8
| Item | Content |
|---|---|
| Tester Connection | M59-3 (CG8B) - G170-29 (E) |
| Tool Setting | 2 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside vehicle 3.
All doors closed 4.
Back door opener switch assembly off → on |
| *a | Checking for switch ON signal at short intervals |
Waveform 9
| Item | Content |
|---|---|
| Tester Connection | M59-16 (TSW5) - G170-29 (E) |
| Tool Setting | 2 V/DIV., 500 ms/DIV. |
| Condition | Back door opener switch assembly (unlock switch) off → on |
| Item | Content |
|---|---|
| Tester Connection | M59-17 (TSW6) - G170-29 (E) |
| Tool Setting | 2 V/DIV., 500 ms/DIV. |
| Condition | Back door opener switch assembly (lock switch) off → on |
| *a | Before lock or unlock switch of electrical key transmitter sub-assembly pressed |
| *b | After lock or unlock switch of electrical key transmitter sub-assembly pressed |
Waveform 10
| Item | Content |
|---|---|
| Tester Connection | M59-21 (RCO) - G170-29 (E) |
| Tool Setting | 2 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area 3.
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed |
| *a | Before lock or unlock switch of electrical key transmitter sub-assembly pressed |
| *b | After lock or unlock switch of electrical key transmitter sub-assembly pressed |
Waveform 11
| Item | Content |
|---|---|
| Tester Connection | M59-11 (RDAM) - G170-29 (E) |
| Tool Setting | 5 V/DIV., 500 ms/DIV. |
| Condition | Procedure:
1.
Ignition switch off 2.
All doors locked 3.
Electrical key transmitter sub-assembly not inside vehicle 4.
Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area 5.
Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed |