Toyota Camry (XV70): Terminals Of Ecu
TERMINALS OF ECU
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
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(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(b) Reconnect the instrument panel junction block assembly connectors.
(c) 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 ? | - |
|
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 |
(d) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
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(e) 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 |
|---|---|---|---|---|---|---|
|
3C-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 K62 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 |
|---|---|---|---|---|---|---|
|
K62-4 (+B) - Body ground |
W - Body ground | Input |
Battery power supply |
Always | 11 to 14 V |
- |
| K62-18 (E) - Body ground |
W-B - Body ground | - |
Ground | Always |
Below 1 ? | - |
(c) Reconnect the K62 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 |
|---|---|---|---|---|---|---|
|
R8-18 (RCO) - K62-18 (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:
| Plus generation (See waveform 1) |
- |
| R8-19 (RDAM) - K62-18 (E) |
G - W-B | Input |
Electrical key and tire pressure monitoring system receiver assembly communication circuit | Procedure:
| Plus generation (See waveform 2) |
- |
| R8-20 (CSEL) - K62-18 (E) |
BE - W-B | Output |
Communication channel switching circuit | Procedure:
| 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 |
|
Item | Content |
|---|---|
|
Tester connection | R8-18 (RCO) - K62-18 (E) |
|
Tool setting | 2 V/DIV., 500 ms/DIV. |
|
Condition | Procedure:
|
(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 |
|
Item | Content |
|---|---|
|
Tester connection | R8-19 (RDAM) - K62-18 (E) |
|
Tool setting | 5 V/DIV., 500 ms/DIV. |
|
Condition | Procedure:
|
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