ECD SYSTEM > TERMINALS OF ECM

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HINT:

Each ECM terminal's standard voltage is shown in the table below.

In the table, first follow the information under "Condition". Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specified Condition".

Use the illustration above as a reference for the ECM terminals.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
BATT (E6-2) - E1 (E7-7)	L - BR	Battery (for measuring the battery voltage and for the ECM memory)	Always	9 to 14 V
IGSW (E5-9) - E1 (E7-7)	B-O -BR	Ignition switch	Ignition switch ON	9 to 14 V
+B (E5-1) - E1 (E7-7)	B - BR	Power source of ECM	Ignition switch ON	9 to 14 V
MREL (E5-8) - E1 (E7-7)	W-G - BR	MAIN relay	Ignition switch ON	9 to 14 V
MREL (E5-8) - E1 (E7-7)	W-G - BR	MAIN relay	10 seconds elapsed after ignition switch OFF	0 to 1.5 V
VC (E8-18) - E2 (E8-28)	R-W - BR	Power source of sensor (specific voltage)	Ignition switch ON	4.5 to 5.5 V
VPA (E5-22) - EPA (E5-28)	W-L - BR-W	Accelerator pedal position sensor (for engine control)	Ignition switch ON, accelerator pedal fully released	0.6 to 1.0 V
VPA (E5-22) - EPA (E5-28)	W-L - BR-W	Accelerator pedal position sensor (for engine control)	Ignition switch ON, accelerator pedal fully depressed	3.0 to 4.6 V
VPA2 (E5-23) - EPA2 (E5-29)	GR-G - BR-Y	Accelerator pedal position sensor (for sensor malfunction detection)	Ignition switch ON, accelerator pedal fully released	1.4 to 1.8 V
VPA2 (E5-23) - EPA2 (E5-29)	GR-G - BR-Y	Accelerator pedal position sensor (for sensor malfunction detection)	Ignition switch ON, accelerator pedal fully depressed	3.7 to 5.0 V
VCPA (E5-26) - EPA (E5-28)	LG-R - BR-W	Power source of accelerator pedal position sensor (for VPA)	Ignition switch ON	4.5 to 5.5 V
VCP2 (E5-27) - EPA2 (E5-29)	BR-R - BR-Y	Power source of accelerator pedal position sensor (for VPA2)	Ignition switch ON	4.5 to 5.5 V
THA (E8-31) - E2 (E8-28)	Y-G - BR	IAT sensor	Idling, intake air temperature at 20°C (68°F)	0.5 to 3.4 V
THW (E8-19) - E2 (E8-28)	R-L - BR	ECT sensor	Idling, engine coolant temperature at 80°C (176°F)	0.2 to 1.0 V
STA (E5-7) - E1 (E7-7)	B-Y - BR (A/T) L-Y - BR (M/T)	Starter signal	Cranking	6.0 V or more
#1 (E8-24) - E1 (E7-7) #2 (E8-23) - E1 (E7-7) #3 (E8-22) - E1 (E7-7) #4 (E8-21) - E1 (E7-7)	B-W - BR R - BR V - BR Y-R - BR	Injector	Idling	Pulse generation (see waveform 2)
G+ (E7-23) - G- (E7-31)	Y - L	Camshaft position sensor	Idling	Pulse generation (see waveform 4)
NE+ (E8-27) - NE- (E8-34)	Y - L	Crankshaft position sensor	Idling	Pulse generation (see waveform 4)
STP (E6-15) - E1 (E7-7)	G-W - BR	Stop light switch	Ignition switch ON, brake pedal depressed	7.5 to 14 V
STP (E6-15) - E1 (E7-7)	G-W - BR	Stop light switch	Ignition switch ON, brake pedal released	0 to 1.5 V
ST1- (E6-14) - E1 (E7-7)	R-L - BR	Stop light switch (opposite to STP)	Ignition switch ON, brake pedal depressed	0 to 1.5 V
ST1- (E6-14) - E1 (E7-7)	R-L - BR	Stop light switch (opposite to STP)	Ignition switch ON, brake pedal released	7.5 to 14 V
TC (E5-11) - E1 (E7-7)	P-B -BR	Terminal TC of DLC3	Ignition switch ON	9 to 14 V
W (E5-12) - E1 (E7-7)	R-B - BR	MIL	MIL illuminated	0 to 3 V
W (E5-12) - E1 (E7-7)	R-B - BR	MIL	MIL not illuminated	9 to 14 V
SPD (E6-17) - E1 (E7-7)	V-R - BR	Speed signal from combination meter	Ignition switch ON, slowly rotate wheel	Pulse generation (see waveform 6)
SIL (E5-18) - E1 (E7-7)	R-Y - BR	Terminal SIL of DLC3	Connect intelligent tester to the DLC3	Pulse generation
PIM (E7-28) - E2 (E8-28)	L-B - BR	Manifold absolute pressure sensor	Apply negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg)	1.3 to 1.9 V
PIM (E7-28) - E2 (E8-28)	L-B - BR	Manifold absolute pressure sensor	Same as atmospheric pressure	2.4 to 3.1 V
PIM (E7-28) - E2 (E8-28)	L-B - BR	Manifold absolute pressure sensor	Apply positive pressure of 170 kPa (1,275 mmHg, 50.2 in.Hg)	3.7 to 4.3 V
IREL (E5-10) - E1 (E7-7)	B-W - BR	EDU relay	Ignition switch OFF	9 to 14 V
IREL (E5-10) - E1 (E7-7)	B-W - BR	EDU relay	Idling	0 to 1.5 V
TACH (E5-4) - E1 (E7-7)	B-W - BR	Engine speed	Idling	Pulse generation
PCR1 (E8-26) - E2 (E8-28)	R-Y - BR	Common rail pressure sensor (main)	Idling	1.3 to 1.8 V
GREL (E5-15) - E1 (E7-7)	R - BR	GLOW relay	Cranking	9 to 14 V
GREL (E5-15) - E1 (E7-7)	R - BR	GLOW relay	Idling	0 to 1.5 V
THF (E8-29) - E2 (E8-28)	G-B - BR	Fuel temperature sensor	Ignition switch ON	0.5 to 3.4 V
ALT (E8-8) - E1 (E7-7)	G - BR	Generator (Alternator) duty ratio	Idling	Pulse generation
PCV+ (E8-2) - PCV- (E8-1)	G-W - G-Y	Suction control valve	Idling	Pulse generation (see waveform 1)
INJF (E8-25) - E1 (E7-7)	P - BR	EDU	Idling	Pulse generation (see waveform 3)
VLU (E7-29) - E2 (E8-28)	B - BR	Throttle position sensor	Ignition switch ON, throttle valve fully opened	3.6 to 4.2 V
VLU (E7-29) - E2 (E8-28)	B - BR	Throttle position sensor	Ignition switch ON, throttle valve fully closed	0.4 to 1.0 V
LUSL (E7-4) - E1 (E7-7)	GR - BR	Diesel throttle duty signal	Engine warmed up, racing engine	Pulse generation (see waveform 5)

WAVEFORM 1

Suction control valve signal
Item	Content
Symbols (Terminal No.)	PCV+ (E8-2) - PCV- (E8-1)
Tool Setting	10 V/DIV., 5 msec./DIV.
Condition	Idling or cranking with warm engine

HINT:

The waveform varies depending on the suction control valve operation.

WAVEFORM 2

Injector No. 1 (to No. 4) injection signal
Item	Content
Symbols (Terminal No.)	(a) #1 (E8-24) - E1 (E7-7) (b) #2 (E8-23) - E1 (E7-7) (c) #3 (E8-22) - E1 (E7-7) (d) #4 (E8-21) - E1 (E7-7)
Tool Setting	5 V/DIV., 20 msec./DIV.
Condition	Idling with warm engine

HINT:

The waveform varies depending on the injector injection.

WAVEFORM 3

Injector injection confirmation signal
Item	Content
Symbols (Terminal No.)	INJF (E8-25) - E1 (E7-7)
Tool Setting	2 V/DIV., 20 msec./DIV.
Condition	Idling with warm engine

HINT:

The waveform varies depending on the injector injection.

WAVEFORM 4

Crankshaft position sensor signal and camshaft position sensor signal
Item	Content
Symbols (Terminal No.)	(a) NE+ (E8-27) - NE- (E8-34) (b) G+ (E7-23) - G- (E7-31)
Tool Setting	5 V/DIV., 20 msec./DIV.
Condition	Idling with warm engine

HINT:

The waveform varies depending on the engine speed.

WAVEFORM 5

Diesel throttle signal
Item	Content
Symbols (Terminal No.)	LUSL (E7-4) - E1 (E7-7)
Tool Setting	1 V/DIV., 2 msec./DIV.
Condition	Warm engine with racing engine

HINT:

The waveform varies depending on the throttle valve operation.

WAVEFORM 6

Vehicle speed signal
Item	Content
Symbols (Terminal No.)	SPD (E6-17) - E1 (E7-7)
Tool Setting	5 V/DIV., 10 msec./DIV.
Condition	Driving at vehicle speed of 40 km/h (25 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.