ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU; 2007 MY Land Cruiser [08/2006

Last Modified: 6-7-2017	6.8:8.0.40	Doc ID: RM0000016IX002X
Model Year Start: 2007	Model: Land Cruiser	Prod Date Range: [08/2006 - ]
Title: ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU; 2007 MY Land Cruiser [08/2006 - ]

TERMINALS OF ECU

1. CHECK TRANSPONDER KEY ECU ASSEMBLY

(a) Disconnect the T19 ECU connector.

(b) Measure the resistance and voltage of the wire harness side connector.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (T19-14) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
+B (T19-1) - GND (T19-14)	L-W - W-B	Power source supply	Always	10 to 14 V
KSW (T19-10) - GND (T19-14)	R-B - W-B	Unlock warning switch	Key inserted in ignition key cylinder	Below 1 Ω
KSW (T19-10) - GND (T19-14)	R-B - W-B	Unlock warning switch	No key in ignition key cylinder	10 kΩ or higher

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

(d) Measure the resistance and voltage of the connector.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
GND (T19-14) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω
VC5 (T19-8) - GND (T19-14)	Y - W-B	Power source	No key in ignition key cylinder	Below 1 V
VC5 (T19-8) - GND (T19-14)	Y - W-B	Power source	Key inserted	4.5 to 5.5 V
TXCT (T19-12) - GND (T19-14)	V-G - W-B	Key code output signal	No key in ignition key cylinder	Below 1 V
TXCT (T19-12) - GND (T19-14)	V-G - W-B	Key code output signal	Key inserted	Pulse generation (see waveform 1)
CODE (T19-11) - GND (T19-14)	L-B - W-B	Demodulated signal of key code data	No key in ignition key cylinder	Below 1 V
CODE (T19-11) - GND (T19-14)	L-B - W-B	Demodulated signal of key code data	Key inserted	Pulse generation (see waveform 2)
EFIO (T19-6) - GND (T19-14)	W - W-B	ECM output signal	Ignition switch OFF	Below 1 V
EFIO (T19-6) - GND (T19-14)	W - W-B	ECM output signal	Ignition switch ON	Pulse generation (see waveform 3)
EFII (T19-7) - GND (T19-14)	Y - W-B	ECM input signal	Ignition switch OFF	10 to 14 V
EFII (T19-7) - GND (T19-14)	Y - W-B	ECM input signal	Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.	Pulse generation (see waveform 4)
KSW (T19-10) - GND (T19-14)	R-B - W-B	Unlock warning switch	Key inserted	Below 1 V
KSW (T19-10) - GND (T19-14)	R-B - W-B	Unlock warning switch	No key in ignition key cylinder	10 to 14 V
IND (T19-3) - GND (T19-14)	G-R - W-B	Security indicator signal	Key inserted	Below 1 V
IND (T19-3) - GND (T19-14)	G-R - W-B	Security indicator signal	No key in ignition key cylinder	Pulse generation

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

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Item	Content
Symbols (Terminal No.)	TXCT (T19-12) - GND (T19-14)
Tool Setting	5 V/DIV., 20 msec./DIV.
Condition	Key inserted

(2) Waveform 2 (Reference)

Item	Content
Symbols (Terminal No.)	CODE (T19-11) - GND (T19-14)
Tool Setting	5 V/DIV., 20 msec./DIV.
Condition	Key inserted

(3) Waveform 3 (Reference)

Item	Content
Symbols (Terminal No.)	EFIO (T19-6) - GND (T19-14)
Tool Setting	10 V/DIV., 50 msec./DIV.
Condition	Ignition switch ON

(4) Waveform 4 (Reference)

Item	Content
Symbols (Terminal No.)	EFII (T19-7) - GND (T19-14)
Tool Setting	5 V/DIV., 500 ms/DIV.
Condition	Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.

2. CHECK ECM

(a) Measure the resistance and voltage of the connectors.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
E1 (E7-1) - Body ground	BR- Body ground	Ground	Always	Below 1 Ω
BATT (E9-3) - E1 (E7-1)	B-R - BR	Battery (for measuring battery voltage and for ECM memory)	Always	10 to 14 V
+BM (E9-7) - E1 (E7-1)	Y-B BR	Power source of ECM	Ignition switch OFF	Below 1 V
+BM (E9-7) - E1 (E7-1)	Y-B BR	Power source of ECM	Ignition switch ON	10 to 14 V
+B (E9-1) - E1 (E7-1)	B-Y -BR	Power source of ECM	Ignition switch OFF	Below 1 V
+B (E9-1) - E1 (E7-1)	B-Y -BR	Power source of ECM	Ignition switch ON	10 to 14 V
+B2 (E9-2) - E1 (E7-1)	B-Y - BR	Power source of ECM	Ignition switch OFF	Below 1 V
+B2 (E9-2) - E1 (E7-1)	B-Y - BR	Power source of ECM	Ignition switch ON	10 to 14 V
IGSW (E9-9) - E1 (E7-1)	B-R -BR	Ignition power supply of ECM	Ignition switch OFF	Below 1 V
IGSW (E9-9) - E1 (E7-1)	B-R -BR	Ignition power supply of ECM	Ignition switch ON	10 to 14 V
IMI (E8-16) - E1 (E7-1)	W-BR	Transponder key ECU input signal	Ignition switch OFF	Below 1 V
IMI (E8-16) - E1 (E7-1)	W-BR	Transponder key ECU input signal	Ignition switch ON	Pulse generation (see waveform 1)
IMO (E8-15) - E1 (E7-1)	Y-BR	Transponder key ECU output signal	Ignition switch OFF	10 to 14 V
IMO (E8-15) - E1 (E7-1)	Y-BR	Transponder key ECU output signal	Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.	Pulse generation (see waveform 2)

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

(b) Inspect using an oscilloscope.

(1) Waveform 1 (Reference)

Item	Content
Symbols (Terminal No.)	IMI (E8-16) - E1 (E7-1)
Tool Setting	10 V/DIV., 50 msec./DIV.
Condition	Ignition switch ON

(2) Waveform 2(Reference)

Item	Content
Symbols (Terminal No.)	IMO (E8-15) - E1 (E7-1)
Tool Setting	5 V/DIV., 500 msec./DIV.
Condition	Within 3 seconds after starter operates and initial combustion occurs, or within 3seconds after ignition switch first turned on (IG) after battery disconnected and connected.