ECD SYSTEM > TERMINALS OF ECM

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A066714E04


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 7)
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 6)
EGR (E7-9) - E1 (E7-7)
L-R - BR
EGR E-VRV
Ignition switch ON
Pulse generation
(see waveform 5)
CAN+ (E6-22) - E1 (E7-7)
V* - BR
CAN communication line
Ignition switch ON
Pulse generation
(see waveform 8)
CAN- (E6-21) - E1 (E7-7)
P* - BR
CAN communication line
Ignition switch ON
Pulse generation
(see waveform 9)

HINT:
*: Only for A/T


WAVEFORM 1
A097624E03
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
A009438E03
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
A009437E03
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
A098437E03
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
A096634E03
EGR E-VRV signal 
Item
Content
Symbols (Terminal No.)
EGR (E7-9) - E1 (E7-7)
Tool Setting
5 V/DIV., 1 msec./DIV.
Condition
Idling with warm engine

HINT:
The waveform changes depending on the EGR E-VRV operation.


WAVEFORM 6
A091225E03
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 7
G037487E04
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.


WAVEFORM 8
G036660E03
CAN communication signal 
Item
Content
Symbols (Terminal No.)
CAN+ (E6-22) - E1 (E7-7)
Tool Setting
1 V/DIV., 10 msec./DIV.
Condition
Engine is stopped, ignition switch ON

HINT:
The wavelength becomes shorter as the CAN communication signal.


WAVEFORM 9
G036661E03
CAN communication signal 
Item
Content
Symbols (Terminal No.)
CAN- (E6-21) - E1 (E7-7)
Tool Setting
1 V/DIV., 10 msec./DIV.
Condition
Engine is stopped, ignition switch ON

HINT:
The waveform varies depending on the CAN communication signal.