Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CLEARANCE WARNING ECU ASSEMBLY
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(a) Disconnect the N41 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) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| N41-1 (IG) - N41-30 (E) | B - W-B | IG engine source signal | Power switch off | Below 1 V |
| Power switch on (IG) | 11 to 14 V | |||
| N41-30 (E) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the N41 clearance warning ECU assembly connector.
(d) Measure the voltage and check for pulses according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| N41-4 (BOF) - N41-30 (E) | R - W-B | Power source for front sensor circuit | Power switch off | Below 1 V |
| 11 to 14 V | |||
| N41-6 (E5) - N41-30 (E) | W - W-B | Ground for front clearance sonar | Always | Below 1 Ω |
| N41-8 (SOF) - N41-30 (E) | B - W-B | Front sensor communication signal (Front clearance sonar sensor) |
| Pulse generation (Refer to waveform 1) |
| N41-14 (CBZ) - N41-13 (EF) | LG - L | No. 1 clearance warning buzzer signal | Buzzer sounding | Pulse generation (Refer to waveform 2) |
| N41-15 (BBZ) - N41-16 (ER) | G - BE | No. 2 clearance warning buzzer signal | Buzzer sounding | Pulse generation (Refer to waveform 2) |
| N41-22 (BOR) - N41-30 (E) | LG - W-B | Power source for rear sensor circuit | Power switch off | Below 1 V |
| 11 to 14 V | |||
| N41-23 (E1) - N41-30 (E) | GR - W-B | Ground for rear clearance sonar | Always | Below 1 Ω |
| N41-24 (SOR) - N41-30 (E) | SB - W-B | Rear sensor communication signal (Rear clearance sonar sensor) |
| Pulse generation (Refer to waveform 3) |
(e) Using an oscilloscope, check waveform 1.
(1) Waveform 1 (Reference)
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| Item | Content |
|---|---|
| Measurement terminal | N41-8 (SOF) - N41-30 (E) |
| Measurement setting | 5 V/DIV., 1 ms./DIV. |
| Condition |
|
(f) Using an oscilloscope, check waveform 2.
(1) Waveform 2 (Reference)
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| Item | Content |
|---|---|
| Measurement terminal | N41-14 (CBZ) - N41-13 (EF) N41-15 (BBZ) - N41-16 (ER) |
| Measurement setting | 2 V/DIV., 500 μs./DIV. |
| Condition | Buzzer sounding |
HINT:
The amplitude of the waveform changes according to the set volume.
(g) Using an oscilloscope, check waveform 3.
(1) Waveform 3 (Reference)
| Item | Content |
|---|---|
| Measurement terminal | N41-24 (SOR) - N41-30 (E) |
| Measurement setting | 5 V/DIV., 1 ms./DIV. |
| Condition |
|
COMBINATION METER ASSEMBLY
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HYBRID VEHICLE CONTROL ECU ASSEMBLY
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BLIND SPOT MONITOR SENSOR
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REAR TELEVISION CAMERA ASSEMBLY (w/ Panoramic View Monitor System)
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READ NEXT:
Control Module Communication Bus "A" Off (U0073,U0100,U0124,U0126,U0129,U0140,U0155,U0164,U0265)
DESCRIPTION These DTCs are stored if there is a malfunction in the CAN communication system connected to the clearance warning ECU assembly. HINT: If CAN communication system DTCs are stored, they may
Lost Communication with Blind Spot Monitor Slave Module (U0232,U0233)
DESCRIPTION This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Con
CAN Communication Failure (Message Registry) (U1000)
DESCRIPTION When the clearance warning ECU assembly determines that the CAN communication circuit is malfunctioning during self diagnosis, DTC U1000 is stored. DTC No. Detection Item DTC Detect
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Blind Spot Monitor Slave Module Beam Axis Inspection Incomplete (C1ABC)
DESCRIPTION This DTC is stored when a beam axis inspection has not been performed for the blind spot monitor sensor LH. HINT: This DTC is always stored after replacing a blind spot monitor sensor. The purpose of this DTC is to ensure that a beam axis inspection is performed. Completing the beam axis
Door Mirror ECU LH Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Door Mirror ECU LH Communication Stop Mode Any of the following conditions are met:
Communication stop for "Front Door LH/L-Mirror (FL-Door/L-Mirror)" is indicated on the "Communication Bus Check" screen of the Techstream.
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