Toyota Camry (XV70): Terminals Of Ecu
TERMINALS OF ECU
CLEARANCE WARNING ECU ASSEMBLY
(a) Disconnect the R39 clearance warning ECU assembly connector.
(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
R39-1 (IG) - R39-31 (E) |
IG power source signal |
Ignition switch off | Below 1 V |
|
Ignition switch ON | 11 to 14 V | ||
|
R39-31 (E) - Body ground |
Ground | Always |
Below 1 Ω |
(c) Reconnect the R39 clearance warning ECU assembly connector.
(d) Measure the voltage and resistance check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) | Terminal Description |
Condition | Specified Condition |
|---|---|---|---|
|
R39-2 (BOF) - R39-31 (E) |
Power source for front sensor circuit |
Ignition switch off | Below 1 V |
| 11 to 14 V | ||
|
R39-3 (E5) - R39-31 (E) |
Ground for front clearance sonar |
Always | Below 1 Ω |
|
R39-4 (SOF) - R39-31 (E) |
Front sensor communication signal (Front clearance sonar sensor) |
| Pulse generation (Refer to waveform 1) |
|
R39-9 (CBZ) - R39-8 (EF) |
No. 1 clearance warning buzzer signal |
Buzzer sounding | Pulse generation (Refer to waveform 2) |
|
R39-19 (BOR) - R39-31 (E) |
Power source for rear sensor circuit |
Ignition switch off | Below 1 V |
| 11 to 14 V | ||
|
R39-20 (E1) - R39-31 (E) |
Ground for rear clearance sonar |
Always | Below 1 Ω |
|
R39-21 (SOR) - R39-31 (E) |
Rear sensor communication signal (Rear clearance sonar sensor) |
| Pulse generation (Refer to waveform 1) |
(e) Using an oscilloscope, check waveform 1.
(1) Waveform 1 (Reference)
|
Item | Content |
|---|---|
|
Measurement terminal |
|
| Measurement setting |
5 V/DIV., 1 ms./DIV. |
|
Condition |
|
HINT:
The waveforms for CH1 and CH2 are same.
(f) Using an oscilloscope, check waveform 2.
(1) Waveform 2 (Reference)
|
Item | Content |
|---|---|
|
Measurement terminal | R39-9 (CBZ) - R39-8 (EF) |
|
Measurement setting | 2 V/DIV., 500 μs./DIV. |
|
Condition | Buzzer sounding |
HINT:
The amplitude of the waveform changes according to the set volume.
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Diagnosis System
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Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the GTS to the DLC3.
(b) Turn the ignition switch to ON. (c) Turn the intuitive parking assist system on.
(d) Turn the GTS on. (e) Enter the following menus
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a
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Checking and replacing
fuses
If any of the electrical components do not operate, a fuse may
have blown. If this happens, check and replace the fuses as necessary.
1. Turn the engine switch off.
2. Open the fuse box cover.
Engine compartment (type A)
Push the tabs in and lift the lid off.
Engine compartment (type B)
(if
Radio Broadcast cannot be Received or Poor Reception
CAUTION / NOTICE / HINT
NOTICE:
Depending on the parts that are replaced during vehicle inspection or maintenance, performing initialization, registration or calibration may be needed. Refer to Precaution for Audio and Visual System.
Click here
When replacing the radio and display
