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.
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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 | |||
| P5-1 (HTR) - P5-10 (GND) | B - LA | Forward recognition with heater hood sub-assembly operation signal | Power switch on (IG) Forward recognition with heater hood sub-assembly not operating | 11 to 14 V |
| Power switch on (IG) Forward recognition with heater hood sub-assembly operating | Below 1 V | |||
| P5-10 (GND) - Body ground | LA - Body ground | Ground | Always | Below 1 Ω |
(b) Measure the waveform according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| P5-2 (STRV) - P5-10 (GND) | P - LA | LIN communication signal | Power switch on (IG) | Pulse generation |
(c) 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.
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(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.
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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.
CHECK STEERING VIBRATION ECU
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(a) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| z6-4 (IG) - z6-1 (GND) | Power source | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V | ||
| z6-1 (GND) - Body ground | Ground | Always | Below 1 Ω |
| A-1 (M+) - z6-1 (GND) | Steering vibration operation signal | Power switch on (IG) Steering vibration operating | Pulse generation |
| Power switch on (IG) Steering vibration not operating | Below 1 V |
(b) Measure the waveform according to the value(s) in the table below.
| Terminal No. (Symbol) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| z6-2(LIN1) - z6-1(GND) | LIN communication signal | Power switch on (IG) | Pulse generation |
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: Chassis > Front Recognition Camera
Freeze Frame Data
FREEZE FRAME DATA DESCRIPTION (a) Whenever a front camera system DTC is stored, the forward recognition camera stores the current vehicle state (ECU and sensor information) as Freeze Frame Data. CHECK
Data List / Active Test
DATA LIST / ACTIVE TEST 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 part is faul
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Installation
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Problem Symptoms Table
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