Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
NOTICE:
- DTCs may be output when connectors are disconnected during inspection. Therefore, be sure to clear the DTCs using the Techstream once the inspection has been completed.
- Do not apply excessive force to the forward recognition camera connector.
.png)
CHECK FORWARD RECOGNITION CAMERA
(a) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| P5-7 (IGB) - P5-10 (GND) | LA-P - LA | Power source | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V | |||
| P5-10 (GND) - Body ground | LA - Body ground | Ground | Always | Below 1 Ω |
(b) Check for pulses according to the value(s) in the table below.
HINT:
If the waveform is not similar to that shown in the illustration, a malfunction of a CAN bus line, terminating resistor, or the forward recognition camera is suspected.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| P5-5 (CA1P) - P5-10 (GND) | L - LA | CAN communication signal | Power switch on (IG) | Pulse generation (See waveform 1) |
| P5-11 (CA1N) - P5-10 (GND) | W - LA | CAN communication signal | Power switch on (IG) | Pulse generation (See waveform 2) |
| P5-6 (CANH) - P5-10 (GND) | B - LA | CAN communication signal | Power switch on (IG) | Pulse generation (See waveform 1) |
| P5-12 (CANL) - P5-10 (GND) | W - LA | CAN communication signal | Power switch on (IG) | Pulse generation (See waveform 2) |
(1) WAVEFORM 1
| Item | Content |
|---|---|
| Terminal Name | Between P5-5 (CA1P) and P5-10 (GND) Between P5-6 (CANH) and P5-10 (GND) |
| Tester Range | 1 V/DIV., 10 μs/DIV. |
| Condition | Power switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
.png)
(2) WAVEFORM 2
| Item | Content |
|---|---|
| Terminal Name | Between P5-11 (CA1N) and P5-10 (GND) Between P5-12 (CANL) and P5-10 (GND) |
| Tester Range | 1 V/DIV., 10 μs/DIV. |
| Condition | Power switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
.png)
READ NEXT:
Dtc Check / Clear
DTC CHECK / CLEAR CHECK DTC (a) Connect the Techstream to the DLC3. (b) Turn the power switch on (IG). (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical > Road Sign Assist
Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION (a) Whenever a road sign assist system DTC is stored, the forward recognition camera stores the current vehicle state (ECU and sensor information) as Freeze Frame Data. C
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 pa
SEE MORE:
Airbag Signal Signal Plausibility Failure (B15C464)
DESCRIPTION If the DCM (telematics transceiver) detects an error in communication between the DCM (telematics transceiver) and the airbag ECU assembly as a result of the DCM (telematics transceiver) self check, this DTC will be set. DTC No. Detection Item DTC Detection Condition Trouble Are
Transmitter ID1 Error (C2141-C2144)
DESCRIPTION The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to the tire pressure warning ECU and receiver in the vehicle as radio waves. The ECU compares the measured tir
