Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu

Toyota Tacoma 2015-2018 Service Manual / Vf2cm Transfer / Touch Select 2-4 And High-low System / Terminals Of Ecu

TERMINALS OF ECU

1. CHECK 4 WHEEL DRIVE CONTROL ECU

Text in Illustration

Component with harness connected

(4 Wheel Drive Control ECU)

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
F13-1 (4WD) - F12-10 (GND)	BE - W-B3 LG - W-B4	4WD detection switch signal input	Ignition switch ON Transfer position 2WD	10 to 14 V
F13-1 (4WD) - F12-10 (GND)	BE - W-B3 LG - W-B4	4WD detection switch signal input	Ignition switch ON Transfer position 4WD	Below 1.5 V
F13-2 (ADD) - F12-10 (GND)	G - W-B	A.D.D. position switch input	Ignition switch ON Transfer position 2WD (A.D.D. actuator Free)	10 to 14 V
F13-2 (ADD) - F12-10 (GND)	G - W-B	A.D.D. position switch input	Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock)	Below 1.5 V
F13-3 (4WDL) - F12-10 (GND)	Y - W-B	L4 detection switch signal input	Ignition switch ON Transfer position not in L4	10 to 14 V
F13-3 (4WDL) - F12-10 (GND)	Y - W-B	L4 detection switch signal input	Ignition switch ON Transfer position L4	Below 1.5 V
F13-5 (DT) - F13-25 (DGND)	BE - V	Oil temperature sensor signal input	Ignition switch ON	0.9 to 4.9 V
F13-7 (DL2) - F12-10 (GND)	P - W-B	A.D.D. actuator limit switch input	Ignition switch ON Transfer position 2WD (A.D.D. actuator Free)	10 to 14 V
F13-7 (DL2) - F12-10 (GND)	P - W-B	A.D.D. actuator limit switch input	Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock)	Below 1.5 V
F13-8 (DL1) - F12-10 (GND)	LG - W-B	A.D.D. actuator limit switch input	Ignition switch ON Transfer position 2WD (A.D.D. actuator Free)	Below 1.5 V
F13-8 (DL1) - F12-10 (GND)	LG - W-B	A.D.D. actuator limit switch input	Ignition switch ON Transfer position 4WD (A.D.D. actuator Lock)	10 to 14 V
F13-9 (TL3) - F12-10 (GND)	B - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL3 terminal limit switch off (transfer 2WD or L4)	10 to 14 V
F13-9 (TL3) - F12-10 (GND)	B - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL3 terminal limit switch on (transfer H4)	Below 1.5 V
F13-10 (TL2) - F12-10 (GND)	SB - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL2 terminal limit switch off (transfer 2WD or H4)	10 to 14 V
F13-10 (TL2) - F12-10 (GND)	SB - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL2 terminal limit switch on (transfer L4)	Below 1.5 V
F13-11 (TL1) - F12-10 (GND)	Y - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL1 terminal limit switch off (transfer H4 or L4)	10 to 14 V
F13-11 (TL1) - F12-10 (GND)	Y - W-B	Transfer shift actuator limit switch input	Ignition switch ON TL1 terminal limit switch on (transfer 2WD)	Below 1.5 V
F13-13 (LO) - F12-10 (GND)	V - W-B	Transfer position switch input	Ignition switch ON Transfer position switch 2WD	10 to 14 V
			Ignition switch ON Transfer position switch H4	Below 1.5 V
			Ignition switch ON Transfer position switch L4	Below 1.5 V
F13-14 (2-4) - F12-10 (GND)	GR - W-B	Transfer position switch input	Ignition switch ON Transfer position switch 2WD	Below 1.5 V
			Ignition switch ON Transfer position switch H4	Below 1.5 V
			Ignition switch ON Transfer position switch L4	10 to 14 V
F13-18 (MTN) - F12-10 (GND)*2	V - W-B	Clutch start switch input	Ignition switch ON Clutch pedal released	10 to 14 V
F13-18 (MTN) - F12-10 (GND)*2	V - W-B	Clutch start switch input	Ignition switch ON Clutch pedal depressed	Below 2 V
F13-20 (CANH) - F13-40 (CANL)	BE - W	HIGH-level CAN bus wire - LOW-level CAN bus wire	Ignition switch off Cable disconnected from negative (-) battery terminal	54 to 69 Ω
F13-21 (+B) - F12-10 (GND)	W - W-B	ECU power supply	Always	11 to 14 V
F12-2 (DM1) - F12-10 (GND)	R - W-B	A. D. D. shift motor output	Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation)	Pulse generation (see waveform 1)
F12-4 (IG) - F12-10 (GND)	Y - W-B	ECU and actuator power supply	Ignition switch ON	11 to 14 V
F12-6 (DM2) - F12-10 (GND)	SB - W-B	A. D. D. shift motor output	Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation)	Pulse generation (see waveform 1)
F12-7 (TM2) - F12-10 (GND)	L - W-B	Transfer shift motor output	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4)	Pulse generation (see waveform 2)
F12-8 (TM1) - F12-10 (GND)	G - W-B	Transfer shift motor output	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from L4 to H4 (switching from L4 to H4)	Pulse generation
F12-10 (GND) - Body ground	W-B - Body ground	Ground	Always	Below 1 Ω

*1: for Automatic Transmission
*2: for Manual Transmission
*3: 2GR-FKS
*4: 2TR-FE

(b) Waveform 1

(1) When a gear is engaged and switching is performed

Item	Content
Tester Connection	F12-2 (DM1) - F12-10 (GND)
Tool Setting	5 V/DIV., 100 ms./DIV.
Condition	Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation)

Item

Content

Tester Connection

F12-2 (DM1) - F12-10 (GND)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Ignition switch ON

Transfer position switch H4 to 2WD

(during A.D.D. actuator Lock to Free operation)

Item	Content
Tester Connection	F12-6 (DM2) - F12-10 (GND)
Tool Setting	5 V/DIV., 100 ms./DIV.
Condition	Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation)

Item

Content

Tester Connection

F12-6 (DM2) - F12-10 (GND)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Ignition switch ON

Transfer position switch 2WD to H4

(during A.D.D. actuator Free to Lock operation)

(2) When a gear is not engaged and switching is not performed

Item	Content
Tester Connection	F12-2 (DM1) - F12-10 (GND)
Tool Setting	5 V/DIV., 500 ms./DIV.
Condition	Ignition switch ON Transfer position switch H4 to 2WD (during A.D.D. actuator Lock to Free operation)

Item

Content

Tester Connection

F12-2 (DM1) - F12-10 (GND)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Ignition switch ON

Transfer position switch H4 to 2WD

(during A.D.D. actuator Lock to Free operation)

Item	Content
Tester Connection	F12-6 (DM2) - F12-10 (GND)
Tool Setting	5 V/DIV., 500 ms./DIV.
Condition	Ignition switch ON Transfer position switch 2WD to H4 (during A.D.D. actuator Free to Lock operation)

Item

Content

Tester Connection

F12-6 (DM2) - F12-10 (GND)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Ignition switch ON

Transfer position switch 2WD to H4

(during A.D.D. actuator Free to Lock operation)

(1) When a gear is engaged and switching is performed

Item	Content
Tester Connection	F12-8 (TM1) - F12-10 (GND)
Tool Setting	5 V/DIV., 100 ms./DIV.
Condition	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from L4 to H4 (switching from L4 to H4)

Item

Content

Tester Connection

F12-8 (TM1) - F12-10 (GND)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Ignition switch ON

Shift lever in N*1

Shift lever in neutral*2

Transfer position switch turned from L4 to H4 (switching from L4 to H4)

*1: for Automatic Transmission
*2: for Manual Transmission

Item	Content
Tester Connection	F12-7 (TM2) - F12-10 (GND)
Tool Setting	5 V/DIV., 100 ms./DIV.
Condition	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4)

Item

Content

Tester Connection

F12-7 (TM2) - F12-10 (GND)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Ignition switch ON

Shift lever in N*1

Shift lever in neutral*2

Transfer position switch turned from 2WD to H4 (switching from 2WD to H4)

Transfer position switch turned from H4 to L4 (switching from H4 to L4)

*1: for Automatic Transmission
*2: for Manual Transmission

(2) When a gear is not engaged and switching is not performed

Item	Content
Tester Connection	F12-8 (TM1) - F12-10 (GND)
Tool Setting	5 V/DIV., 1 s./DIV.
Condition	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from L4 to H4 (switching from L4 to H4)

Item

Content

Tester Connection

F12-8 (TM1) - F12-10 (GND)

Tool Setting

5 V/DIV., 1 s./DIV.

Condition

Ignition switch ON

Shift lever in N*1

Shift lever in neutral*2

Transfer position switch turned from L4 to H4 (switching from L4 to H4)

*1: for Automatic Transmission
*2: for Manual Transmission

Item	Content
Tester Connection	F12-7 (TM2) - F12-10 (GND)
Tool Setting	5 V/DIV., 1 s./DIV.
Condition	Ignition switch ON Shift lever in N1 Shift lever in neutral2 Transfer position switch turned from 2WD to H4 (switching from 2WD to H4) Transfer position switch turned from H4 to L4 (switching from H4 to L4)

Item

Content

Tester Connection

F12-7 (TM2) - F12-10 (GND)

Tool Setting

5 V/DIV., 1 s./DIV.

Condition

Ignition switch ON

Shift lever in N*1

Shift lever in neutral*2

Transfer position switch turned from 2WD to H4 (switching from 2WD to H4)

Transfer position switch turned from H4 to L4 (switching from H4 to L4)

*1: for Automatic Transmission
*2: for Manual Transmission

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