GSIC - Global Service Information Center

# 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 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

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

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

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

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

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

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.