Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK HYBRID VEHICLE CONTROL ECU
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| A32-15 (STP) - G59-6 (E1) | GR - W-B | Stop light switch signal | Brake pedal depressed | 11 to 14 V |
| Brake pedal released | 0 to 1.5 V | |||
| A33-28 (ST1-) - G59-6 (E1) | LG - W-B | Stop light switch signal | Power switch on (IG), brake pedal depressed | 0 to 1.5 V |
| Power switch on (IG), brake pedal released | 11 to 14 V | |||
| G59-28 (CCS) - G59-6 (E1) | R - W-B | Steering pad switch circuit | Cruise control switch not pushed | 1 MΩ or higher |
| Cruise control main switch pushed | Below 2.5 Ω | |||
| CANCEL switch pushed | 228 to 252 Ω | |||
| +RES switch pushed | 599 to 661 Ω | |||
| -SET switch pushed | 1463 to 1617 Ω |
NOTICE:
- Turning the power switch on (IG) with connectors disconnected may cause DTCs to be stored. Make sure to clear the DTCs after inspection has been performed.
- Do not apply excessive force to the forward recognition camera connector.
CHECK FORWARD RECOGNITION CAMERA
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(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 |
|---|---|---|---|---|
| P5-3 (LKSW) - P5-10 (GND) | BE - LA | Steering pad switch assembly signal (distance control signal) | Power switch on (IG), steering pad switch assembly (vehicle-to-vehicle distance control switch) on | Below 1 V |
| Power switch on (IG), steering pad switch assembly (vehicle-to-vehicle distance control switch) off | 4.75 to 5.25 V | |||
| P5-10 (GND) - Body ground | LA - Body ground | Ground | Always | Below 1 Ω |
| 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 |
(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 |
|---|---|---|---|---|
| P5-6 (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 | Pulse generation (See waveform 2) | ||
| P5-5 (CA1P) - P5-10 (GND) | L - LA | Pulse generation (See waveform 1) | ||
| P5-11 (CA1N) - P5-10 (GND) | W - LA | Pulse generation (See waveform 2) |
(1) WAVEFORM 1
.png)
| Item | Content |
|---|---|
| Tester Connection |
|
| Tool Setting | 1 V/DIV., 10 μs/DIV. |
| Condition | Power switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
(2) WAVEFORM 2
.png)
| Item | Content |
|---|---|
| Tester Connection |
|
| Tool Setting | 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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