Terminals Of Ecu

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

CHECK MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)

Fig 1: Identifying Main Body ECU Connector Terminals (Driver Side Junction Block)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the DA, DD, DF, L11, L12, L13 and A68 ECU connectors.

Measure the voltage and resistance according to the value(s) in the table below.

VOLTAGE AND RESISTANCE CHART

Terminal No (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
L11-1 (GND3) - DA-41 (GND1)	W-B - W-B	Ground	Always	Below 1 Ω
DA-40 (GND1) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
DA-40 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
DF-1 (ALTB) - Body ground	B - Body ground	IG power supply	Always	11 to 14 V
L12-1 (AM2) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
L13-6 (AM1) - Body ground	W - Body ground	Battery power supply	Always	11 to 14 V
L13-24 (DCTY) - Body ground	W - Body ground	Driver side door courtesy light switch input	Driver side door is open	Below 1 Ω
L13-24 (DCTY) - Body ground	W - Body ground	Driver side door courtesy light switch input	Driver side door is closed	10 kΩ or higher
L12-21 (PCTY) - Body ground	L - Body ground	Front passenger side door courtesy light switch input	Front passenger side door is open	Below 1 Ω
L12-21 (PCTY) - Body ground	L - Body ground	Front passenger side door courtesy light switch input	Front passenger side door is closed	10 kΩ or higher
L12-7 (RCTY) - Body ground	R - Body ground	Rear RH side door courtesy light switch input	Rear RH side door is open	Below 1 Ω
L12-7 (RCTY) - Body ground	R - Body ground	Rear RH side door courtesy light switch input	Rear RH side door is closed	10 kΩ or higher
DD-12 (LCTY) - Body ground	L - Body ground	Rear LH side door courtesy light switch input	Rear LH side door is open	Below 1 Ω
DD-12 (LCTY) - Body ground	L - Body ground	Rear LH side door courtesy light switch input	Rear LH side door is closed	10 kΩ or higher

If the result is not as specified, there may be a malfunction on the wire harness side.

CHECK MASTER SWITCH ASSEMBLY

Fig 2: Identifying N13 Switch Connector Terminalss

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the N13 switch connector.

Measure the voltage and resistance according to the value(s) in the table below

VOLTAGE AND RESISTANCE CHART

Terminal No (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
N13-12 (GND) - Body ground	R - Body ground	Ground	Always	Below 1 Ω
N13-11 (B) - N13-12 (GND)	B - R	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side

CHECK FRONT DOOR ECU LH

Fig 3: Identifying Front Multiplex Network Door ECU LH Connector Terminalss

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the N10 ECU connector.

Measure the voltage and resistance according to the value(s) in the table below

VOLTAGE AND RESISTANCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
N10-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
N10-6 (BDR) - N10-1 (GND)	O - W-B	Battery power supply	Always	11 to 14 V
N10-11 (CPUB) - N10-1 (GND)	B - W-B	Battery power supply	Always	11 to 14 V
N10-16 (BDG1) - N10-1 (GND)	R - W-B	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the N10 ECU connector.

Measure the voltage according to the value(s) in the table below.

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
N9-2 (A+) - N10-1 (GND)	R - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
N9-2 (A+) - N10-1 (GND)	R - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
N9-1 (A-) - N10-1 (GND)	B - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
N9-1 (A-) - N10-1 (GND)	B - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
N9-22 (KUL) - N10-1 (GND)	GR - W-B	Driver side door lock key switch input	Driver side door key cylinder UNLOCK	Below 1 V
N9-22 (KUL) - N10-1 (GND)	GR - W-B	Driver side door lock key switch input	Power switch OFF, all doors closed and driver side door key cylinder neutral position	Pulse generation (see ewaveform 1 or f2)
N9-23 (KL) - N10-1 (GND)	P - W-B	Driver side door lock key switch input	Driver side door key cylinder LOCK	Below 1 V
N9-23 (KL) - N10-1 (GND)	P - W-B	Driver side door lock key switch input	Power switch OFF, all doors closed and driver side door key cylinder neutral position	Pulse generation (see ewaveform 1 or f2)
N9-25 (LSW) - N9-13 (LSWE)	R - B	Driver side door lock position switch input	Driver side door is UNLOCK	Below 1 V
N9-25 (LSW) - N9-13 (LSWE)	R - B	Driver side door lock position switch input	Power switch OFF, all doors closed and driver side door is LOCK	Pulse generation (see gwaveform 3 or h4)

If the result is not as specified, the ECU may have a malfunction

Using an oscilloscope, check waveform 1.

Waveform 1 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N9-22 (KUL) - N10-1 (GND) N9-23 (KL) - N10-1 (GND)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and driver side door key cylinder neutral position

Fig 4: Identifying Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N9-22 (KUL) - N10-1 (GND) N9-23 (KL) - N10-1 (GND)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and driver side door key cylinder neutral position

Fig 5: Identifying Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 3

Waveform 3 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N9-25 (LSW) - N9-13 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and driver side door is LOCK

Fig 6: Identifying Waveform 3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 4.

Waveform 4 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N9-25 (LSW) - N9-13 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and driver side door is LOCK

CHECK FRONT DOOR ECU RH

Fig 7: Identifying Waveform 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 8: Identifying P4, N1 And N2 Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the N1 ECU connector.

Measure the voltage and resistance according to the value(s) in the table below.

VOLTAGE AND RESISTANCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
N1-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
N1-6 (BDR) - N1-1 (GND)	O - W-B	Battery power supply	Always	11 to 14 V
N1-11 (CPUB) - N1-1 (GND)	R - W-B	Battery power supply	Always	11 to 14 V
N1-16 (BDG1) - N1-1 (GND)	R - W-B	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the N1 ECU connector.

Measure the voltage according to the value(s) in the table below

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
N2-2 (A+) - N1-1 (GND)	R - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
N2-2 (A+) - N1-1 (GND)	R - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
N2-1 (A-) - N1-1 (GND)	B - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
N2-1 (A-) - N1-1 (GND)	B - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
P4-11 (PML) - P4-20 (DLE)	B - W	Door control switch (front passenger side door control switch) input	Door control switch (front passenger side door control switch) LOCK	Below 1 V
P4-11 (PML) - P4-20 (DLE)	B - W		Power switch OFF, all doors closed and door control switch (front passenger side door control switch) neutral position	Pulse generation (see ewaveform 1 or f2)
P4-12 (PMUL) - P4-20 (DLE)	R - W	Door control switch (front passenger side door control switch) input	Door control switch (front passenger side door control switch) UNLOCK	Below 1 V
P4-12 (PMUL) - P4-20 (DLE)	R - W		Power switch OFF, all doors closed and door control switch (front passenger side door control switch) neutral position	Pulse generation (see ewaveform 1 or f2)
N2-25 (LSW) - N2-13 (LSWE)	R - B	Front passenger side door lock position switch input	Front passenger side door is UNLOCK	Below 1 V
N2-25 (LSW) - N2-13 (LSWE)	R - B	Front passenger side door lock position switch input	Power switch OFF, all doors closed and front passenger side door is LOCK	Pulse generation (see gwaveform 3 or h4)

If the result is not as specified, the ECU may have a malfunction

Using an oscilloscope, check waveform 1

Waveform 1 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	P4-11 (PML) - P4-20 (DLE) P4-12 (PMUL) - P4-20 (DLE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and door control switch (front passenger side door control switch) neutral position

Fig 9: Identifying Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	P4-11 (PML) - P4-20 (DLE) P4-12 (PMUL) - P4-20 (DLE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and door control switch (front passenger side door control switch) neutral position

Fig 10: Identifying Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 3

Waveform 3 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N2-25 (LSW) - N2-13 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and front passenger side door is LOCK

Fig 11: Identifying Waveform 3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an oscilloscope, check waveform 4

Waveform 4 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	N2-25 (LSW) - N2-13 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and front passenger side door is LOCK

Fig 12: Identifying Waveform 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

CHECK REAR DOOR ECU LH

Fig 13: Identifying O14 And O13 Connector Terminalss

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the O14 ECU connector.

Measure the voltage and resistance according to the value(s) in the table below.

VOLTAGE AND RESISTANCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
O14-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
O14-6 (BDR) - O14-1 (GND)	L - W-B	Battery power supply	Always	11 to 14 V
O14-11 (CPUB) - O14-1 (GND)	R - W-B	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the O14 ECU connector

Measure the voltage according to the value(s) in the table below

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
O13-2 (A+) - O14-1 (GND)	R - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
O13-2 (A+) - O14-1 (GND)	R - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
O13-1 (A-) - O14-1 (GND)	B - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
O13-1 (A-) - O14-1 (GND)	B - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
O13-14 (LSW) - O13-23 (LSWE)	R - B	Rear LH side door lock position switch input	Rear LH side door is UNLOCK	Below 1 V
O13-14 (LSW) - O13-23 (LSWE)	R - B	Rear LH side door lock position switch input	Power switch OFF, all doors closed and rear LH side door is LOCK	Pulse generation (see ewaveform 1 or f2)

If the result is not as specified, the ECU may have a malfunction.

Using an oscilloscope, check waveform 1.

Waveform 1 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	O13-14 (LSW) - O13-23 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and rear LH side door is LOCK

Fig 14: Identifying Waveform 1

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	O13-14 (LSW) - O13-23 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and rear LH side door is LOCK

Fig 15: Identifying Waveform 2

CHECK REAR DOOR ECU RH

Fig 16: Identifying O3 And O4 Connector Terminals

Disconnect the O3 ECU connector

Measure the voltage and resistance according to the value(s) in the table below

VOLTAGE AND RESISTANCE CHART

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
O3-1 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
O3-6 (BDR) - O3-1 (GND)	L - W-B	Battery power supply	Always	11 to 14 V
O3-11 (CPUB) - O3-1 (GND)	R - W-B	Battery power supply	Always	11 to 14 V

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the O3 ECU connector.

Measure the voltage according to the value(s) in the table below.

VOLTAGE SPECIFICATION

Terminal No. (Symbols)	Wiring Color	Terminal Description	Condition	Specified Condition
O4-2 (A+) - O3-1 (GND)	R - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
O4-2 (A+) - O3-1 (GND)	R - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
O4-1 (A-) - O3-1 (GND)	B - W-B	Door lock motor UNLOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder UNLOCK	11 to 14 V
O4-1 (A-) - O3-1 (GND)	B - W-B	Door lock motor LOCK drive output	Door control switch (master switch or front passenger side door control switch) or driver side door key cylinder LOCK	Below 1 V
O4-14 (LSW) - O4-23 (LSWE)	R - B	Rear RH side door lock position switch input	Rear RH side door is UNLOCK	Below 1 V
O4-14 (LSW) - O4-23 (LSWE)	R - B	Rear RH side door lock position switch input	Power switch OFF, all doors closed and rear RH side door is LOCK	Pulse generation (see ewaveform 1 or f2)

If the result is not as specified, the ECU may have a malfunction.

Using an oscilloscope, check waveform 1

Waveform 1 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	O4-14 (LSW) - O4-23 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and rear RH side door is LOCK

Fig 17: Identifying Waveform 1

Using an oscilloscope, check waveform 2.

Waveform 2 (Reference):

WAVEFORM REFERENCE

Item	Content
Terminal No (Symbols)	O4-14 (LSW) - O4-23 (LSWE)
Tool Setting	5 V/DIV, 20 ms/DIV
Condition	Power switch OFF, all doors closed and rear RH side door is LOCK

Fig 18: Identifying Waveform 2