Door Hatch. Power Back Door System Terminals Of Ecu

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200

Door Hatch. Land Cruiser. Urj200, 202 Grj200 Vdj200

CHECK POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU)

CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

Power Back Door System -- Terminals Of Ecu

CHECK POWER BACK DOOR UNIT ASSEMBLY (POWER BACK DOOR ECU)

Disconnect the L52 power back door unit assembly (power back door ECU) connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
L52-10 (ECUB) - Body ground	R - Body ground	ECUB power supply	Always	11 to 14 V
L52-12 (B) - Body ground	B - Body ground	Power supply	Always	11 to 14 V
L52-8 (IG) - Body ground	G - Body ground	IG power supply	Engine switch on (IG)	11 to 14 V
L52-8 (IG) - Body ground	G - Body ground	IG power supply	Engine switch off	Below 1 V
L52-15 (OSL) - L52-14 (OSE)	G - BR1 G - BE2	Power back door sensor LH circuit	Power back door sensor LH not pressed	Approximately 1 kΩ
L52-15 (OSL) - L52-14 (OSE)	G - BR1 G - BE2	Power back door sensor LH circuit	Power back door sensor LH pressed	Below 100 Ω
L52-13 (OSR) - L52-14 (OSE)	Y - BR1 P - BE2	Power back door sensor RH circuit	Power back door sensor RH not pressed	Approximately 1 kΩ
L52-13 (OSR) - L52-14 (OSE)	Y - BR1 P - BE2	Power back door sensor RH circuit	Power back door sensor RH pressed	Below 100 Ω
L52-11 (GND) - Body ground	W-B - Body ground	Body ground	Always	Below 1 Ω
L52-17 (MSW) - Body ground	G - Body ground	Power back door main switch signal circuit	Power back door main switch not pushed (on)	Below 1 Ω
L52-17 (MSW) - Body ground	G - Body ground	Power back door main switch signal circuit	Power back door main switch pushed (off)	10 kΩ or higher
L52-4 (DS1) - Body ground	R - Body ground	Back door control switch signal circuit	Back door control switch on	Below 1 Ω
L52-4 (DS1) - Body ground	R - Body ground	Back door control switch signal circuit	Back door control switch off	10 kΩ or higher

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

Reconnect the L52 power back door unit assembly (power back door ECU) connector.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
L52-26 (BZR+) - Body ground	L - Body ground	Power back door warning buzzer signal input	Power back door warning buzzer sounding	Pulse generation (See waveform 1)
L52-26 (BZR+) - Body ground	L - Body ground	Power back door warning buzzer signal input	Power back door warning buzzer stopped	Below 1 V
L52-2 (DC+) - L52-1 (DC-)	R - B	Power back door lock motor circuit	Power back door lock motor operating	11 to 14 V
L52-2 (DC+) - L52-1 (DC-)	R - B	Power back door lock motor circuit	Power back door lock motor stopped	Below 1 V
L52-17 (MSW) - Body ground	G - Body ground	Power back door main switch signal circuit	Power back door main switch not pushed (on)	Below 1 V
L52-17 (MSW) - Body ground	G - Body ground	Power back door main switch signal circuit	Power back door main switch pushed (off)	Pulse generation (See waveform 2)
L52-20 (FUL) - Body ground	W - Body ground	Back door courtesy switch signal circuit	Back door opened	Below 1 V
L52-20 (FUL) - Body ground	W - Body ground	Back door courtesy switch signal circuit	Back door closed	Pulse generation (See waveform 3)
L52-4 (DS1) - Body ground	R - Body ground	Back door control switch signal circuit	Back door control switch on	Below 1 V
L52-4 (DS1) - Body ground	R - Body ground	Back door control switch signal circuit	Back door control switch off	Pulse generation (See waveform 4)
L52-22 (HAF) - Body ground	G - Body ground	Back door lock half-latch switch signal circuit	Back door opened	Below 1 V
L52-22 (HAF) - Body ground	G - Body ground	Back door lock half-latch switch signal circuit	Back door closed	Pulse generation (See waveform 5)
L52-24 (POS) - Body ground	B - Body ground	Back door lock position switch signal circuit	Back door closed	Below 1 V
L52-24 (POS) - Body ground	B - Body ground	Back door lock position switch signal circuit	Back door opened	Pulse generation (See waveform 6)
L52-23 (CYLH) - Body ground	G - Body ground	Lower tail gate courtesy switch LH circuit	Lower tail gate opened	Below 1 V
L52-23 (CYLH) - Body ground	G - Body ground	Lower tail gate courtesy switch LH circuit	Lower tail gate closed	Pulse generation (See waveform 7)
L52-7 (CYRH) - Body ground	Y - Body ground1 P - Body ground2	Lower tail gate courtesy switch RH circuit	Lower tail gates opened	Below 1 V
L52-7 (CYRH) - Body ground	Y - Body ground1 P - Body ground2	Lower tail gate courtesy switch RH circuit	Lower tail gate closed	Pulse generation (See waveform 8)

*1: Model code: GRJ200L-GNANKC, URJ202L-GNTEKC
*2: Model code except: GRJ200L-GNANKC, URJ202L-GNTEKC

Using an oscilloscope, check waveform 1.
Waveform 1 (Reference)
Item
Content
Terminal (Symbol)
L52-26 (BZR+) - Body ground
Tool Setting
5 V/DIV., 1 ms/DIV
Condition
Power back door warning buzzer sounding

Using an oscilloscope, check waveform 2.
Waveform 2 (Reference)
Item
Content
Terminal (Symbol)
L52-17 (MSW) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Power back door main switch pushed (off)

Using an oscilloscope, check waveform 3.
Waveform 3 (Reference)
Item
Content
Terminal (Symbol)
L52-20 (FUL) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Back door closed

Using an oscilloscope, check waveform 4.
Waveform 4 (Reference)
Item
Content
Terminal (Symbol)
L52-4 (DS1) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Back door lock control switch off

Using an oscilloscope, check waveform 5.
Waveform 5 (Reference)
Item
Content
Terminal (Symbol)
L52-22 (HAF) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Back door closed

Using an oscilloscope, check waveform 6.
Waveform 6 (Reference)
Item
Content
Terminal (Symbol)
L52-24 (POS) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Back door opened

Using an oscilloscope, check waveform 7.
Waveform 7 (Reference)
Item
Content
Terminal (Symbol)
L52-23 (CYLH) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Lower tail gate closed

Using an oscilloscope, check waveform 8.
Waveform 8 (Reference)
Item
Content
Terminal (Symbol)
L52-7 (CYRH) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Lower tail gate closed

Waveform 1 (Reference)
Item	Content
Terminal (Symbol)	L52-26 (BZR+) - Body ground
Tool Setting	5 V/DIV., 1 ms/DIV
Condition	Power back door warning buzzer sounding

Waveform 2 (Reference)
Item	Content
Terminal (Symbol)	L52-17 (MSW) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Power back door main switch pushed (off)

Waveform 3 (Reference)
Item	Content
Terminal (Symbol)	L52-20 (FUL) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Back door closed

Waveform 4 (Reference)
Item	Content
Terminal (Symbol)	L52-4 (DS1) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Back door lock control switch off

Waveform 5 (Reference)
Item	Content
Terminal (Symbol)	L52-22 (HAF) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Back door closed

Waveform 6 (Reference)
Item	Content
Terminal (Symbol)	L52-24 (POS) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Back door opened

Waveform 7 (Reference)
Item	Content
Terminal (Symbol)	L52-23 (CYLH) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Lower tail gate closed

Waveform 8 (Reference)
Item	Content
Terminal (Symbol)	L52-7 (CYRH) - Body ground
Tool Setting	5 V/DIV., 10 ms/DIV
Condition	Lower tail gate closed

CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

Disconnect the 2A, 2B, 2D, E2 and E3 main body ECU (cowl side junction block LH) connectors.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
2B-20 (BATB) - Body ground	L - Body ground	Battery power supply	Always	11 to 14 V
2A-1 (ACC) - Body ground	B - Body ground	ACC power supply	Always	11 to 14 V
E2-2 (PBDS) - Body ground	R - Body ground	Door control switch circuit	Door control switch pushed (on)	Below 1 Ω
E2-2 (PBDS) - Body ground	R - Body ground	Door control switch circuit	Door control switch not pushed (off)	10 kΩ or higher
2D-62 (GND2) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
E3-1 (GND3) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

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

Reconnect the 2A, 2B, 2D, E2 and E3 ECU (cowl side junction block LH) connectors.

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
E2-2 (PBDS) - Body ground	R - Body ground	Door control switch circuit	Door control switch pushed (on)	Below 1 V
E2-2 (PBDS) - Body ground	R - Body ground	Door control switch circuit	Door control switch not pushed (off)	Pulse generation (See waveform 1 or 2)

Using an oscilloscope, check waveform.
Waveform1 (Reference)
Item
Content
Terminal (Symbol)
E2-2 (PBDS) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Door control switch not pushed (off)

Using an oscilloscope, check waveform.
Waveform2 (Reference)
Item
Content
Terminal (Symbol)
E2-2 (PBDS) - Body ground
Tool Setting
5 V/DIV., 10 ms/DIV
Condition
Door control switch not pushed (off)