TERMINALS OF ECU CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
 (a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
Click here  (b) Measure the resistance according to the value(s) in the table below.
HINT: Measure the values on the wire harness side with the connectors connected. |
Terminal No. (Symbol) | Wiring Color |
Input/Output | Terminal Description |
Condition | Specified Condition |
Related Data List Item | |
G32-19 (GND2) - Body ground |
W-B - Body ground | - |
Ground | Always |
Below 1 Ω | - |
(c) Reconnect the instrument panel junction block assembly connectors.
(d) Measure the voltage and resistance according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Input/Output | Terminal Description |
Condition | Specified Condition |
Related Data List Item | |
MB-11 (GND1) - Body ground |
- | - |
Ground | Always |
Below 1 Ω | - | |
MB-30 (ACC) - Body ground |
- | Input |
ACC power supply | Engine switch on (ACC) |
11 to 14 V |
ACC SW | | Engine switch off |
Below 1 V | |
MB-31 (BECU) - Body ground |
- | Input |
Battery power supply |
Always | 11 to 14 V |
- | |
MB-32 (IG) - Body ground |
- | Input |
IG power supply | Engine switch on (IG) |
11 to 14 V |
IG SW | | Engine switch off |
Below 1 V | (e) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
Click here (f) Measure the voltage and check for pulses according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Input/Output | Terminal Description |
Condition | Specified Condition |
Related Data List Item | |
4F-29 (BZR) - Body ground |
L - Body ground |
Output | Wireless door lock buzzer output |
Active Test Wireless Buzzer is OFF |
Below 1 V |
- | | Active Test Wireless Buzzer is ON |
Pulse generation (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V) |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
 (a) Disconnect the G40 certification ECU (smart key ECU assembly) connector.
(b) Measure the voltage and resistance according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Input/Output | Terminal Description |
Condition | Specified Condition |
Related Data List Item | |
G40-4 (+B) - Body ground |
W - Body ground | Input |
Battery power supply |
Always | 11 to 14 V |
- | | G40-18 (E) - Body ground |
W-B - Body ground | - |
Ground | Always |
Below 1 Ω | - |
(c) Reconnect the G40 certification ECU (smart key ECU assembly) connector.
(d) Check for pulses according to the value(s) in the table below. |
Terminal No. (Symbol) | Wiring Color |
Input/Output | Terminal Description |
Condition | Specified Condition |
Related Data List Item | |
K10-18 (RCO) - G40-18 (E) |
B - W-B | Output |
Output to electrical key and tire pressure monitoring system receiver assembly
(Power
supply for electrical key and tire pressure monitoring system receiver
assembly. Certification ECU (smart key ECU assembly) outputs 5 V when
receiver starts operating.) | Procedure:
- Turn engine switch off
- Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
- Press lock or unlock switch of electrical key transmitter sub-assembly
| Plus generation (See waveform 1) |
- | | K10-19 (RDAM) - G40-18 (E) |
G - W-B | Input |
Electrical key and tire pressure monitoring system receiver assembly communication circuit | Procedure:
- Turn engine switch off
- Lock all doors
- Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
- Press lock or unlock switch of electrical key transmitter sub-assembly
| Plus generation (See waveform 2) |
- | | K10-20 (CSEL) - G40-18 (E) |
BE - W-B | Output |
Communication channel switching circuit | Procedure:
- Turn engine switch off
- Close all doors
| No pulse generation → Pulse generation |
- | (e) Using an oscilloscope, check waveform 1.
HINT: The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
|
*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 1 (Reference) |
Item | Content | |
Tester connection | K10-18 (RCO) - G40-18 (E) | |
Tool setting | 2 V/DIV., 500 ms/DIV. | |
Condition | Procedure:
- Turn engine switch off
- Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
- Press lock or unlock switch of electrical key transmitter sub-assembly
| (f) Using an oscilloscope, check waveform 2.
HINT: The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.
|
*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 2 (Reference) |
Item | Content | |
Tester connection | K10-19 (RDAM) - G40-18 (E) | |
Tool setting | 5 V/DIV., 500 ms/DIV. | |
Condition | Procedure:
- Turn engine switch off
- Lock all doors
- Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
- Press lock or unlock switch of electrical key transmitter sub-assembly
| | 
