Lexus ES: Terminals Of Ecu
TERMINALS OF ECU
CHECK LUGGAGE CLOSER MOTOR ASSEMBLY
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(a) Disconnect the R7 luggage closer motor assembly connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| R7-8 (IG) - Body ground | LA-B - Body ground | IG power supply | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V | |||
| R7-10 (ECUB) - Body ground | LA-W - Body ground | Auxiliary battery power supply | Power switch off | 11 to 14 V |
| R7-12 (B) - Body ground | B - Body ground | Auxiliary battery power supply | Power switch off | 11 to 14 V |
| R7-11 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the R7 luggage closer motor 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 |
|---|---|---|---|---|
| R7-1 (LCM-) - Body ground | L - Body ground | Luggage compartment door lock motor lock drive output | Power trunk lid close operating | 11 to 14 V |
| Power trunk lid not operating | Below 1 V | |||
| R7-2 (LCM+) - Body ground | LG - Body ground | Luggage compartment door unlock motor lock drive output | Power trunk lid open operating | 11 to 14 V |
| Power trunk lid not operating | Below 1 V | |||
| R7-4 (LDDN) - Body ground | GR - Body ground | Door control switch input | Door control switch on | Below 1 V |
| Door control switch off | 11 to 14 V | |||
| R7-7 (HAF) - Body ground | V - Body ground | Half latch switch input | Luggage compartment door fully open | Below 1 V |
| Luggage compartment door half latched → fully close | 11 to 14 V | |||
| R7-20 (PAWL) - Body ground | P - Body ground | Pawl switch input | Luggage compartment door fully open → fully close | 11 to 14 V → Below 1 V → 11 to 14 V |
| Luggage compartment door fully close → fully open | 11 to 14 V → Below 1 V → 11 to 14 V | |||
| R7-21 (SWG) - Body ground | L - Body ground | Half latch switch and pawl switch ground | Luggage compartment door fully open | Below 1 V |
| Luggage compartment door half latched → fully close | 11 to 14 V | |||
| R7-16 (CSG) - Body ground | W - Body ground | Luggage door closer assembly (pulse sensor) ground | Always | Below 1 Ω |
| R7-17 (CS2) - Body ground | B - Body ground | Luggage door closer assembly (pulse sensor) signal | Luggage door closer assembly operating | Pulse generation (See waveform 1) |
| R7-18 (CS1) - Body ground | G - Body ground | Luggage door closer assembly (pulse sensor) signal | Luggage door closer assembly operating | Pulse generation (See waveform 2) |
| R7-19 (CSV) - Body ground | R - Body ground | Luggage door closer assembly (pulse sensor) power supply | Always | 7 V or higher |
| R7-24 (KSIN) - Body ground | L - Body ground | Kick door control sensor input | Kick door control sensor not detecting a foot → detecting a foot | Pulse generation (See waveform 3) |
(1) Using an oscilloscope, check waveform 1.
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Waveform 1 (Reference) | Item | Condition |
|---|---|
| Tester connection | R7-17 (CS2) - Body ground |
| Tool setting | 2 V/DIV, 10 ms/DIV. |
| Vehicle condition | Luggage door closer assembly operating |
HINT:
The period changes in accordance to the speed at which the luggage compartment door is opened and closed.
(2) Using an oscilloscope, check waveform 2.
Waveform 2 (Reference)| Item | Condition |
|---|---|
| Tester connection | R7-18 (CS1) - Body ground |
| Tool setting | 2 V/DIV, 10 ms/DIV. |
| Vehicle condition | Luggage door closer assembly operating |
HINT:
The period changes in accordance to the speed at which the luggage compartment door is opened and closed.
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(3) Using an oscilloscope, check waveform 3.
Waveform 3 (Reference)| Item | Condition |
|---|---|
| Tester connection | R7-24 (KSIN) - Body ground |
| Tool setting | 2 V/DIV, 50 ms/DIV. |
| Vehicle condition | Kick door control sensor not detecting a foot → detecting a foot |
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| *a | Kick detection signal |
CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
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(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
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(b) Measure the resistance according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| G36-19 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 Ω |
(c) Reconnect the instrument panel junction block assembly connectors.
(d) Measure the resistance and voltage according to the value(s) in the table below.
| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
|---|---|---|---|---|
| MB-11 (GND1) - Body ground | - | Ground | Always | Below 1 Ω |
| MB-30 (ACC) - Body ground | - | ACC power supply | Power switch on (ACC) | 11 to 14 V |
| Power switch off | Below 1 V | |||
| MB-31 (BECU) - Body ground | - | Auxiliary battery power supply | Power switch off | 11 to 14 V |
| MB-32 (IG) - Body ground | - | IG power supply | Power switch on (IG) | 11 to 14 V |
| Power switch off | Below 1 V |
(e) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.
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(f) 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 |
|---|---|---|---|---|
| G38-4 (TSW) - Body ground | LG - Body ground | Luggage compartment door opening switch input | Trunk and fuel switch assembly (luggage compartment door opening switch) on | Below 1 V |
| Power switch off, all doors closed and trunk and fuel switch assembly (luggage compartment door opening switch) off | Pulse generation | |||
| G38-27 (TMSW) - Body ground | B - Body ground | Luggage door opening cancel switch assembly input | Luggage door opening cancel switch assembly on | Below 1 V |
| Power switch off, all doors closed and luggage door opening cancel switch assembly off | 11 to 14 V |
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
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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 / Back Door / Trouble
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
Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Power Trunk Lid System DTC No. Detection Item Link B2205 Kick Sensor Circuit B2222 PBD/PTL Pulse Sensor B2225 PBD/PTL Motor Clutch Malf
SEE MORE:
Fail-safe Chart
FAIL-SAFE CHART FAIL-SAFE FUNCTION OF CONTROL SYSTEM (a) When a malfunction is detected in the brake control system, the skid control ECU (brake booster with master cylinder assembly) turns the ABS warning, brake warning / red (malfunction), brake warning / yellow (minor malfunction) and slip indica
Maintenance and care
Maintenance and care
Cleaning and protecting the vehicle
exterior
Perform cleaning in a manner
appropriate to each component
and its material.
Cleaning instructions
Working from top to bottom, liberally
apply water to the vehicle body,
wheel wells and underside of the
vehicle to remo
