ECD SYSTEM(w/ DPF) TERMINALS OF ECM

Tech Tips

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated.

The result of the checks should be compared with the standard normal voltage for that pair of terminals, which is displayed in the Specified Condition column.

The illustration above can be used as a reference to identify the ECM terminal locations.

Terminal No. (Symbol)	Wiring Color	Terminal Description	Condition	Specified Condition
A59-1 (+B) - A59-2 (E1)	B - W-B	Power source of ECM	Ignition switch ON	11 to 14 V
A59-61 (+B2) - A59-2 (E1)	B - W-B	Power source of ECM	Ignition switch ON	11 to 14 V
A59-23 (BATT) - A59-2 (E1)	V - W-B	Battery (for measuring the battery voltage and for the ECM memory)	Always	11 to 14 V
A59-7 (IGSW) - A59-2 (E1)	R - W-B	Ignition switch	Ignition switch ON	11 to 14 V
A59-22 (MREL) - A59-2 (E1)	GR - W-B	ECD MAIN relay	Ignition switch ON	11 to 14 V
A59-22 (MREL) - A59-2 (E1)	GR - W-B	ECD MAIN relay	20 seconds elapsed after ignition switch off	0 to 1.5 V
B21-13 (GREL) - A59-2 (E1)	W - W-B	Glow plug relay assembly	Ignition switch ON at cold engine	0 to 1.5 V
B21-13 (GREL) - A59-2 (E1)	W - W-B	Glow plug relay assembly	Idling with warm engine	11 to 14 V
A59-55 (VPA) - A59-57 (EPA)	R - R	Accelerator pedal sensor assembly (for engine control)	Ignition switch ON Accelerator pedal fully released	0.6 to 1.0 V
A59-55 (VPA) - A59-57 (EPA)	R - R	Accelerator pedal sensor assembly (for engine control)	Ignition switch ON Accelerator pedal fully depressed	3.0 to 4.6 V
A59-52 (VPA2) - A59-54 (EPA2)	L - B	Accelerator pedal sensor assembly (for sensor malfunction detection)	Ignition switch ON Accelerator pedal fully released	1.4 to 1.8 V
A59-52 (VPA2) - A59-54 (EPA2)	L - B		Ignition switch ON Accelerator pedal fully depressed	3.7 to 5.0 V
A59-56 (VCPA) - A59-57 (EPA)	B - R	Power source of accelerator pedal sensor assembly (for VPA)	Ignition switch ON	4.5 to 5.0 V
A59-53 (VCP2) - A59-54 (EPA2)	W - B	Power source of accelerator pedal sensor assembly (for VPA2)	Ignition switch ON	4.5 to 5.0 V
A59-46 (VCTA) - A59-47 (ETA)	W - R	Power source of diesel throttle position sensor	Ignition switch ON	4.5 to 5.0 V
A59-45 (VTA1) - A59-47 (ETA)	B - R	Diesel throttle position sensor	Throttle valve fully opened	3.2 to 4.9 V
A59-45 (VTA1) - A59-47 (ETA)	B - R	Diesel throttle position sensor	Throttle valve fully closed	0.5 to 1.1 V
A59-43 (M+) - A59-2 (E1)	B - W-B	Diesel throttle duty signal	Engine racing	Pulse generation
A59-42 (M-) - A59-2 (E1)	W - W-B	Diesel throttle duty signal	Engine racing	Pulse generation
A59-63 (H-) - A59-2 (E1)	G - W-B	Air fuel ratio sensor heater	Ignition switch ON	11 to 14 V
A59-63 (H-) - A59-2 (E1)	G - W-B	Air fuel ratio sensor heater	Idling with warm engine	Pulse generation (See waveform 1)
A59-69 (AF1+) - A59-2 (E1)	W - W-B	Air fuel ratio sensor signal	Ignition switch ON	1.5 to 4.9 V
A59-70 (AF1-) - A59-2 (E1)	BR - W-B	Air fuel ratio sensor signal	Ignition switch ON	2.35 to 2.65 V
A59-68 (TR) - A59-2 (E1)	B - W-B	Air fuel ratio sensor signal	Ignition switch ON	1.5 to 4.9 V
A59-71 (RE) - A59-2 (E1)	Y - W-B	Air fuel ratio sensor signal	Ignition switch ON	2.1 to 3.5 V
B21-29 (THF) - B21-28 (ETHF)	W - R	Fuel temperature sensor	Idling	0.5 to 2.0 V
B21-15 (VCS) - B21-14 (E2S)	BR - B	Power source of fuel pressure sensor	Ignition switch ON	4.5 to 5.0 V
B21-16 (PC) - B21-14 (E2S)	R - B	Fuel pressure sensor (Common rail pressure sensor)	Idling	1.0 to 1.3 V
A59-11 (VG) - A59-12 (EVG)	GR - V	Mass air flow meter	Idling	Pulse generation
A59-30 (THA) - A59-31 (ETHA)	P - R	Intake air temperature sensor	Idling, intake air temperature at 20°C (68°F)	0.5 to 2.0 V
B21-4 (PRV) - A59-2 (E1)	Y - W-B	Pressure control valve signal	Drive vehicle at 50 km/h (31 mph) with third gear, and then decelerate by releasing accelerator pedal	Pulse generation (See waveform 2)
B21-12 (PCV) - A59-2 (E1)	L - W-B	Supply pump (Suction control valve)	Idling	Pulse generation (See waveform 3)
B21-1 (IJ1+) - B21-21 (IJ1-)	B - W	Injector	Idling	Pulse generation
B21-2 (IJ2+) - B21-30 (IJ2-)	R - W	Injector	Idling	Pulse generation
B21-3 (IJ3+) - B21-31 (IJ3-)	L - Y	Injector	Idling	Pulse generation
B21-20 (IJ4+) - B21-32 (IJ4-)	G - B	Injector	Idling	Pulse generation
A59-50 (THCI) - A59-51 (ETCI)	BR - P	Exhaust gas temperature sensor B1S1	Idling with warm engine	2.9 to 3.3 V
A59-48 (THCO) - A59-49 (ETCO)	L - Y	Exhaust gas temperature sensor B1S2	Idling with warm engine	2.9 to 3.3 V
B21-40 (THW) - B21-39 (ETHW)	L - BR	Engine coolant temperature sensor	Idling, engine coolant temperature at 80°C (176°F)	0.2 to 1.0 V
B21-8 (THIA) - B21-7 (ETHI)	B - W	Intake air temperature sensor (intake manifold)	Idling, intake air temperature at 0 to 80°C (32 to 176°F)	0.5 to 2.0 V
A59-14 (VPIM) - A59-15 (EPIM)	R - Y	Power source of diesel turbo pressure sensor	Ignition switch ON	4.5 to 5.0 V
A59-13 (PIM) - A59-15 (EPIM)	G - Y	Diesel turbo pressure sensor	Ignition switch ON (same as atmosphere pressure)	0.8 to 1.4 V
B21-19 (NE+) - B21-18 (NE-)	L - P	Crankshaft position sensor	Idling	Pulse generation (See waveform 4)
B21-11 (G+) - B21-10 (G-)	G - R	Camshaft position sensor	Idling	Pulse generation (See waveform 4)
B21-37 (VNVC) - B21-36 (VNE2)	G - L	Power source of nozzle vane position sensor	Ignition switch ON	4.5 to 5.0 V
B21-38 (VTAI) - B21-36 (VNE2)	R - L	Nozzle vane position sensor	VN turbocharger fully closed	0.9 to 2.1 V
B21-38 (VTAI) - B21-36 (VNE2)	R - L	Nozzle vane position sensor	VN turbocharger fully opened	3.0 to 4.1 V
B21-34 (M+) - A59-2 (E1)	BR - W-B	VN turbocharger motor	Idling with warm engine	Pulse generation
B21-33 (M-) - A59-2 (E1)	Y - W-B	VN turbocharger motor	Idling with warm engine	Pulse generation
A59-40 (ECBV) - A59-2 (E1)	W - W-B	VSV for EGR cooler bypass valve	Ignition switch ON at cold engine	0 to 1.5 V
A59-40 (ECBV) - A59-2 (E1)	W - W-B	VSV for EGR cooler bypass valve	Idling with warm engine	11 to 14 V
B21-26 (VCEG) - B21-25 (EEGL)	Y - L	Power source of EGR valve position sensor	Ignition switch ON	4.5 to 5.0 V
B21-23 (EGM+) - A59-2 (E1)	B - W-B	EGR valve motor	Idling with warm engine	Pulse generation
B21-22 (EGM-) - A59-2 (E1)	W - W-B	EGR valve motor	Idling with warm engine	Pulse generation
B21-27 (EGLS) - B21-25 (EEGL)	P - L	EGR valve position sensor	EGR valve fully closed	0.8 to 1.6 V
B21-27 (EGLS) - B21-25 (EEGL)	P - L	EGR valve position sensor	EGR valve fully opened	3.6 to 4.4 V
A59-33 (VCPX) - A59-34 (EPEX)	B - W	Power source of differential pressure sensor	Ignition switch ON	4.5 to 5.0 V
A59-32 (PEX) - A59-34 (EPEX)	R - W	Differential pressure sensor	Ignition switch ON	0.5 to 1.0 V
A59-5 (D) - A59-2 (E1)	B - W-B	No. 2 clutch start switch assembly	Ignition switch ON Clutch pedal released	11 to 14 V
A59-5 (D) - A59-2 (E1)	B - W-B	No. 2 clutch start switch assembly	Ignition switch ON Clutch pedal depressed	0 to 1.5 V
A59-8 (OILH) - A59-2 (E1)	V - W-B	Engine oil level upper switch	Oil level upper switch off	4.5 to 5.0 V
A59-8 (OILH) - A59-2 (E1)	V - W-B	Engine oil level upper switch	Oil level upper switch ON	0 to 1.5 V
A59-6 (STA) - A59-2 (E1)	BR - W-B	Starter signal	Cranking	6.0 V or more
A59-80 (TACH) - A59-2 (E1)	LG - W-B	Engine speed	Idling	Pulse generation
A59-29 (STP) - A59-2 (E1)	LG - W-B	Stop light switch	Brake pedal depressed	7.5 to 14 V
A59-29 (STP) - A59-2 (E1)	LG - W-B	Stop light switch	Brake pedal released	0 to 1.5 V
A59-28 (ST1-) - A59-2 (E1)	B - W-B	Stop light switch (opposite to STP)	Brake pedal depressed	0 to 1.5 V
A59-28 (ST1-) - A59-2 (E1)	B - W-B	Stop light switch (opposite to STP)	Brake pedal released	7.5 to 14 V
A59-25 (SPD) - A59-2 (E1)	V - W-B	Speed signal from combination meter	Ignition switch ON driving wheel rotating slowly	Pulse generation (See waveform 5)
A59-37 (W) - A59-2 (E1)	B - W-B	MIL	MIL illuminated	0 to 3 V
A59-37 (W) - A59-2 (E1)	B - W-B	MIL	MIL not illuminated	11 to 14 V
A59-24 (TC) - A59-2 (E1)	L - W-B	Terminal TC of DLC3	Ignition switch ON	11 to 14 V
A59-20 (FANL) - A59-2 (E1)	R - W-B	Cooling fan relay	Ignition switch ON	11 to 14 V
A59-20 (FANL) - A59-2 (E1)	R - W-B	Cooling fan relay	Idling with warm engine	0 to 1.5 V
A59-21 (FANH) - A59-2 (E1)	G - W-B	No. 2 cooling fan relay	Idling with high engine coolant temperature	0 to 1.5 V
A59-10 (ELS) - A59-2 (E1)	G - W-B	Electric load	Tail light switch ON	7.5 to 14 V
A59-10 (ELS) - A59-2 (E1)	G - W-B	Electric load	Tail light switch off	0 to 1.5 V
A59-27 (ELS2) - A59-2 (E1)	B - W-B	Electric load	Defogger switch ON	7.5 to 14 V
A59-27 (ELS2) - A59-2 (E1)	B - W-B	Electric load	Defogger switch off	0 to 1.5 V
A59-26 (MHSW) - A59-2 (E1)*1	W - W-B	Power heater switch signal	Power heater switch ON	11 to 14 V
A59-9 (R) - A59-2 (E1)	R - W-B	Back-up light switch signal	Back-up light switch on	11 to 14 V
A59-3 (CANH) - A59-2 (E1)	L - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 6)
A59-4 (CANL) - A59-2 (E1)	W - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 7)
A59-17 (CANP) - A59-2 (E1)	B - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 6)
A59-16 (CANN) - A59-2 (E1)	W - W-B	CAN communication line	Ignition switch ON	Pulse generation (See waveform 7)
A59-73 (POP) - A59-75 (E2)	BR - L	Oil pressure sender gauge assembly	Engine running	0.5 to 4.5 V
A59-79 (NEO) - A59-2 (E1)*2	V - W-B	Crankshaft Position Sensor	Idling	Pulse generation (See waveform 8)
A59-74 (VC) - A59-75 (E2)	R - L	Power source of oil pressure sender gauge assembly	Ignition switch ON	4.5 to 5.5 V
B21-5 (V20) - A59-2 (E1)	R - W-B	Oil pressure switching valve assembly	Oil pressure switching valve ON	0 to 1.5 V
B21-5 (V20) - A59-2 (E1)	R - W-B	Oil pressure switching valve assembly	Oil pressure switching valve OFF	11 to 14 V

*1: w/ Combustion Type Power Heater
*2: w/ Entry and Start System

Waveform 1


*a	5 V/DIV.
*b	2 ms/DIV.

Air Fuel Ratio Sensor Heater
ECM Terminal Name	H- - E1
Tester Range	5 V/DIV., 2 ms/DIV.
Condition	Idling with warm engine

Tech Tips

The wavelength varies depending on the engine operating condition.

Waveform 2


*1	10 V/DIV.
*2	0.5 ms/DIV.

Pressure Control Valve Signal
ECM Terminal Name	PRV - E1
Tester Range	10 V/DIV., 0.5 ms/DIV.
Condition	Drive vehicle at 50 km/h (31 mph) with third gear, and then decelerate by releasing accelerator pedal

Tech Tips

The waveform varies depending on the pressure control valve operation.

Waveform 3


*a	10 V/DIV.
*b	5 ms/DIV.

Suction Control Valve Signal
ECM Terminal Name	PCV - E1
Tester Range	10 V/DIV., 5 ms/DIV.
Condition	Idling or cranking with warm engine

Tech Tips

The waveform varies depending on the suction control valve operation.

Waveform 4


*a	5 V/DIV.
*b	10 ms/DIV.

Crankshaft Position Sensor and Camshaft Position Sensor Signal
ECM Terminal Name	NE+ - NE- G+ - G-
Tester Range	5 V/DIV., 10 ms/DIV.
Condition	Idling

Tech Tips

The waveform varies depending on the engine speed.

Waveform 5


*a	1 V/DIV.
*b	10 ms/DIV.

Vehicle Speed Signal
ECM Terminal Name	SPD - E1
Tester Range	1 V/DIV., 10 ms/DIV.
Condition	While driving vehicle

Tech Tips

The wavelength becomes shorter as the vehicle speed increases.

Waveform 6


*a	1 V/DIV.
*b	10 μs/DIV.

CAN Communication Signal (Reference)
ECM Terminal Name	CANH - E1 CANP - E1
Tester Range	1 V/DIV., 10 μs/DIV.
Condition	Engine stopped, ignition switch ON

Tech Tips

The wavelength varies depending on the CAN communication signal.

Waveform 7


*a	1 V/DIV.
*b	10 μs/DIV.

CAN Communication Signal (Reference)
ECM Terminal Name	CANL - E1 CANN - E1
Tester Range	1 V/DIV., 10 μs/DIV.
Condition	Engine stopped, ignition switch ON

Tech Tips

The wavelength varies depending on the CAN communication signal.

Waveform 8


*a	5 V/DIV.
*b	1 ms/DIV.

Crankshaft Position Sensor Signal
ECM Terminal Name	NEO - E1
Tester Range	5 V/DIV., 1 ms/DIV.
Condition	Idling

Tech Tips

The wavelength varies depending on the crankshaft position sensor signal.