ECD SYSTEM(w/ DPF) TERMINALS OF ECM

B001WNEE01

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

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

A38*1-20 (BATT) - C45*1-81 (E1)

A52*2-20 (BATT) - C46*2-81 (E1)

 L - BR Battery (for measuring the battery voltage and for the ECM memory) Always 11 to 14 V

A38*1-28 (IGSW) - C45*1-81 (E1)

A52*2-28 (IGSW) - C46*2-81 (E1)

 B - BR Engine switch Engine switch on (IG) 11 to 14 V

A38*1-2 (+B) - C45*1-81 (E1)

A52*2-2 (+B) - C46*2-81 (E1)

 B - BR Power source of ECM Engine switch on (IG) 11 to 14 V

A38*1-1 (+B2) - C45*1-81 (E1)

A52*2-1 (+B2) - C46*2-81 (E1)

 B - BR Power source of ECM Engine switch on (IG) 11 to 14 V

A38*1-44 (MREL) - C45*1-81 (E1)

A52*2-44 (MREL) - C46*2-81 (E1)

 W - BR EFI relay Engine switch on (IG) 11 to 14 V
10 seconds elapsed after engine switch turned off 0 to 1.5 V

C45*1-66 (VCPM) - C45*1-92 (E2)

C46*2-66 (VCPM) - C46*2-92 (E2)

 L-B - BR Power source of manifold absolute pressure sensor (for PIM) Engine switch on (IG) 4.5 to 5.5 V

C45*1-118 (VCM) - C45*1-95 (E2M)

C46*2-118 (VCM) - C46*2-95 (E2M)

 L-R - BR Power source of fuel pressure sensor (for PCR1) Engine switch on (IG) 4.5 to 5.5 V

C45*1-91 (VC) - C45*1-92 (E2)

C46*2-91 (VC) - C46*2-92 (E2)

 B - BR Power source of EGR valve position sensor and differential pressure sensor Engine switch on (IG) 4.5 to 5.5 V

C45*1-110 (VCVL) - C45*1-87 (EVLU)

C46*2-110 (VCVL) - C46*2-87 (EVLU)

 L-R - BR Power source of throttle position sensor Engine switch on (IG) 4.5 to 5.5 V

C45*1-71 (VG) - C45*1-94 (EVG)

C46*2-71 (VG) - C46*2-94 (EVG)

 L-Y - G-W Mass air flow meter Idling Pulse generation

C45*1-115 (THA) - C45*1-92 (E2)

C46*2-115 (THA) - C46*2-92 (E2)

 Y - BR Intake air temperature sensor (built into mass air flow meter) Engine warmed up and idling, intake air temperature at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V

A38*1-53 (VPA) - A38*1-57 (EPA)

A52*2-53 (VPA) - A52*2-57 (EPA)

 R - W Accelerator pedal position sensor (for engine control) Engine switch on (IG), accelerator pedal fully released 0.6 to 1.0 V
Engine switch on (IG), accelerator pedal fully depressed 3.0 to 4.6 V

A38*1-54 (VPA2) - A38*1-58 (EPA2)

A52*2-54 (VPA2) - A52*2-58 (EPA2)

 GR - BE Accelerator pedal position sensor (for sensor malfunction detection) Engine switch on (IG), accelerator pedal fully released 1.4 to 1.8 V
Engine switch on (IG), accelerator pedal fully depressed 3.7 to 5.0 V

A38*1-55 (VCPA) - A38*1-57 (EPA)

A52*2-55 (VCPA) - A52*2-57 (EPA)

 L - W Power source of accelerator pedal position sensor (for VPA) Engine switch on (IG) 4.5 to 5.5 V

A38*1-56 (VCP2) - A38*1-58 (EPA2)

A52*2-56 (VCP2) - A52*2-58 (EPA2)

 V - BE Power source of accelerator pedal position sensor (for VPA2) Engine switch on (IG) 4.5 to 5.5 V

C45*1-90 (THIA) - C45*1-92 (E2)

C46*2-90 (THIA) - C46*2-92 (E2)

 W-G - BR Intake air temperature sensor (turbo) Engine warmed up and idling, intake air temperature sensor (after turbocharged) at 0 to 80°C (32 to 176°F) 0.5 to 3.4 V

C45*1-93 (THW) - C45*1-92 (E2)

C46*2-93 (THW) - C46*2-92 (E2)

 G-B - BR Engine coolant temperature sensor Engine warmed up and idling, engine coolant temperature at 60 to 120°C (140 to 248°F) 0.2 to 1.2 V

C45*1-40 (#1) - C45*1-81 (E1)

C46*2-40 (#1) - C46*2-81 (E1)

 Y - BR Injector assembly Idling

Pulse generation

(see waveform 1)

C45*1-39 (#2) - C45*1-81 (E1)

C46*2-39 (#2) - C46*2-81 (E1)

 B - BR

C45*1-38 (#3) - C45*1-81 (E1)

C46*2-38 (#3) - C46*2-81 (E1)

 L - BR

C45*1-37 (#4) - C45*1-81 (E1)

C46*2-37 (#4) - C46*2-81 (E1)

 R - BR

C45*1-36 (#5) - C45*1-81 (E1)

C46*2-36 (#5) - C46*2-81 (E1)

 G - BR

C45*1-35 (#6) - C45*1-81 (E1)

C46*2-35 (#6) - C46*2-81 (E1)

 V - BR

C45*1-34 (#7) - C45*1-81 (E1)

C46*2-34 (#7) - C46*2-81 (E1)

 W - BR

C45*1-33 (#8) - C45*1-81 (E1)

C46*2-33 (#8) - C46*2-81 (E1)

 P - BR

C45*1-80 (G+) - C45*1-79 (G-)

C46*2-80 (G+) - C46*2-79 (G-)

 W - B Camshaft position sensor Idling Pulse generation

C45*1-78 (NE+) - C45*1-77 (NE-)

C46*2-78 (NE+) - C46*2-77 (NE-)

 B - W Crankshaft position sensor Idling Pulse generation

C45*1-67 (PIM) - C45*1-92 (E2)

C46*2-67 (PIM) - C46*2-92 (E2)

 P-L - BR Manifold absolute pressure sensor Negative pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied 0.1 to 0.7 V
Same as atmospheric pressure 0.8 to 1.4 V
Positive pressure of 170 kPa (1275 mmHg, 50.2 in.Hg) applied 1.6 to 2.2 V

A38*1-45 (IREL) - C45*1-81 (E1)

A52*2-45 (IREL) - C46*2-81 (E1)

 LG - BR EDU relay (EDU 1) Engine switch off 11 to 14 V
Idling 0 to 1.5 V

A38*1-46 (IRL2) - C45*1-81 (E1)

A52*2-46 (IRL2) - C46*2-81 (E1)

 V - BR EDU relay (EDU 2) Engine switch off 11 to 14 V
Idling 0 to 1.5 V

C45*1-72 (PCR1) - C45*1-95 (E2M)

C46*2-72 (PCR1) - C46*2-95 (E2M)

 B - BR Fuel pressure sensor

Idling (Approximately 35 MPa (357 kgf/cm2, 5078 psi))

 1.3 to 1.8 V

A38*1-12 (GREL) - C45*1-81 (E1)

A52*2-12 (GREL) - C46*2-81 (E1)

 V - BR No. 1 glow relay Cranking 11 to 14 V
Idling 0 to 1.5 V

A38*1-23 (GRL2) - C45*1-81 (E1)

A52*2-23 (GRL2) - C46*2-81 (E1)

 LG - BR No. 2 glow relay Cranking 11 to 14 V
Idling 0 to 1.5 V

C45*1-116 (THF) - C45*1-92 (E2)

C46*2-116 (THF) - C46*2-92 (E2)

 G-R - BR Fuel temperature sensor Engine switch on (IG) 0.5 to 3.4 V

C45*1-104 (PCV+) - C45*1-105 (PCV-)

C46*2-104 (PCV+) - C46*2-105 (PCV-)

 W - BR Suction control valve Idling

Pulse generation

(see waveform 2)

C45*1-60 (INJ1) - C45*1-81 (E1)

C46*2-60 (INJ1) - C46*2-81 (E1)

 G - BR No. 1 injector driver Idling

Pulse generation

(see waveform 3)

C45*1-61 (INJ2) - C45*1-81 (E1)

C46*2-61 (INJ2) - C46*2-81 (E1)

 W - BR No. 2 injector driver Idling

Pulse generation

(see waveform 3)

C45*1-64 (VLU) - C45*1-87 (EVLU)

C46*2-64 (VLU) - C46*2-87 (EVLU)

 L-W - BR Throttle position sensor (for Bank 1)

Engine switch on (IG)

(throttle valve fully opened)

 2.8 to 3.8 V

Idling

(throttle valve fully closed)

 0.4 to 1.0 V

C45*1-65 (VLU2) - C45*1-87 (EVLU)

C46*2-65 (VLU2) - C46*2-87 (EVLU)

 L-W - BR Throttle position sensor (for Bank 2)

Engine switch on (IG)

(throttle valve fully opened)

 2.8 to 3.8 V

Idling

(throttle valve fully closed)

 0.4 to 1.0 V

C45*1-57 (LUSL) - C45*1-81 (E1)

C46*2-57 (LUSL) - C46*2-81 (E1)

 B - BR Diesel throttle duty signal (for Bank 1) Engine warmed up, racing engine

Pulse generation

(see waveform 4)

C45*1-56 (LUS2) - C45*1-81 (E1)

C46*2-56 (LUS2) - C46*2-81 (E1)

 B - BR Diesel throttle duty signal (for Bank 2) Engine warmed up, racing engine

Pulse generation

(see waveform 4)

C45*1-88 (EGLS) - C45*1-92 (E2)

C46*2-88 (EGLS) - C46*2-92 (E2)

 R-W - BR No. 1 EGR valve position sensor Engine switch on (IG) 3.0 to 4.6 V

C45*1-89 (EGS2) - C45*1-92 (E2)

C46*2-89 (EGS2) - C46*2-92 (E2)

 R-B - BR No. 2 EGR valve position sensor Engine switch on (IG) 3.0 to 4.6 V

C45*1-82 (EGRS) - C45*1-81 (E1)

C46*2-82 (EGRS) - C46*2-81 (E1)

 R - BR No. 1 EGR valve assembly Engine warmed up and idling

Pulse generation

(see waveform 5)

C45*1-42 (ERS2) - C45*1-81 (E1)

C46*2-42 (ERS2) - C46*2-81 (E1)

 R-W - BR No. 2 EGR valve assembly Engine warmed up and idling

Pulse generation

(see waveform 5)

C45*1-86 (M+) - C45*1-81 (E1)

C46*2-86 (M+) - C46*2-81 (E1)

 G - BR DC motor (turbocharger sub-assembly for Bank 1) Idling

Pulse generation

(see waveform 6)

C45*1-18 (VN2+) - C45*1-81 (E1)

C46*2-18 (VN2+) - C46*2-81 (E1)

 W - BR DC motor (turbocharger sub-assembly for Bank 2) Idling

Pulse generation

(see waveform 6)

C45*1-85 (M-) - C45*1-81 (E1)

C46*2-85 (M-) - C46*2-81 (E1)

 B - BR DC motor (turbocharger sub-assembly for Bank 1) Idling

Pulse generation

(see waveform 7)

C45*1-41 (VN2-) - C45*1-81 (E1)

C46*2-41 (VN2-) - C46*2-81 (E1)

 B - BR DC motor (turbocharger sub-assembly for Bank 2) Idling

Pulse generation

(see waveform 7)

A38*1-13 (STP) - C45*1-81 (E1)

A52*2-13 (STP) - C46*2-81 (E1)

 R - BR Stop light switch Engine switch on (IG), brake pedal depressed 7.5 to 14 V
Engine switch on (IG), brake pedal released 0 to 1.5 V

A38*1-35 (ST1-) - C45*1-81 (E1)

A52*2-35 (ST1-) - C46*2-81 (E1)

 P - BR

Stop light switch

(opposite to STP)

 Engine switch on (IG), brake pedal depressed 0 to 1.5 V
Engine switch on (IG), brake pedal released 7.5 to 14 V

A38*1-15 (TACH) - C45*1-81 (E1)

A52*2-15 (TACH) - C46*2-81 (E1)

 W - BR Engine speed Idling

Pulse generation

(see waveform 8)

A38*1-8 (SPD) - C45*1-81 (E1)

A52*2-8 (SPD) - C46*2-81 (E1)

 V - BR Speed signal from combination meter Engine switch on (IG), wheel rotated slowly

Pulse generation

(see waveform 9)

A38*1-48 (STA) - C45*1-81 (E1)

A52*2-48 (STA) - C46*2-81 (E1)

 R - BR Starter signal Cranking 6.0 V or more

C45*1-53 (ALT) - C45*1-81 (E1)

C46*2-53 (ALT) - C46*2-81 (E1)

 R - BR Generator duty ratio Idling Pulse generation

A38*1-27 (TC) - C45*1-81 (E1)

A52*2-27 (TC) - C46*2-81 (E1)

 V - BR Terminal TC of DLC3 Engine switch on (IG) 11 to 14 V

A38*1-24 (W) - C45*1-81 (E1)

A52*2-24 (W) - C46*2-81 (E1)

 R - BR MIL MIL illuminated 0 to 3 V
MIL not illuminated 11 to 14 V

A38*1-30 (AC1) - C45*1-81 (E1)

A52*2-30 (AC1) - C46*2-81 (E1)

 L - BR A/C signal A/C switch on 0 to 1.5 V
A/C switch off 11 to 14 V

A38*1-18 (ACT) - C45*1-81 (E1)

A52*2-18 (ACT) - C46*2-81 (E1)

 G - BR A/C signal Engine switch on (IG) 11 to 14 V
A/C cut control on 0 to 3 V

C45*1-55 (PSW) - C45*1-81 (E1)

C46*2-55 (PSW) - C46*2-81 (E1)

 P - BR Power steering oil pressure switch Steering wheel turned 0 to 3 V
Steering wheel not turned 11 to 14 V

A38*1-52 (ACM) - C45*1-81 (E1)

A52*2-52 (ACM) - C46*2-81 (E1)

 L - BR VSV (for engine mounting) Idling 0 to 1.5 V

C45*1-49 (NSW) - C45*1-81 (E1)

C46*2-49 (NSW) - C46*2-81 (E1)

 L - BR Park/neutral position switch Engine switch on (IG), shift lever in P or N Below 3 V
Engine switch on (IG), shift lever not in P and N 11 to 14 V

A38*1-41 (CANH) - C45*1-81 (E1)

A52*2-41 (CANH) - C46*2-81 (E1)

 P - BR CAN communication line Engine switch on (IG)

Pulse generation

(see waveform 10)

A38*1-49 (CANL) - C45*1-81 (E1)

A52*2-49 (CANL) - C46*2-81 (E1)

 B - BR CAN communication line Engine switch on (IG)

Pulse generation

(see waveform 11)

A38*1-47 (STSW) - C45*1-81 (E1)

A52*2-47 (STSW) - C46*2-81 (E1)

 R - BR Engine switch signal Shift lever in P or N, engine switch pushed 6.0 V or more

A38*1-22 (ACCR) - C45*1-81 (E1)

A52*1-22 (ACCR) - C45*1-81 (E1)

 L-Y - BR ACC (Accessory) relay control signal Cranking Below 1.5 V

C45*1-52 (STAR) - C45*1-81 (E1)

C46*2-52 (STAR) - C46*2-81 (E1)

 L - BR Starter relay control Engine switch on (IG) Below 1.5 V
Cranking 6.0 V or more

C45*1-54 (PRD) - C45*1-81 (E1)

C46*2-54 (PRD) - C46*2-81 (E1)

 Y - BR Pressure discharge valve drive signal Engine warmed up, engine racing Pulse generation (See waveform 12)

C45*1-32 (RLFF) - C45*1-81 (E1)

C46*2-32 (RLFF) - C46*2-81 (E1)

 R - BR Pressure discharge valve confirmation signal Engine warmed up, engine racing Pulse generation (See waveform 12)

C45*1-120 (VNVC) - C45*1-97 (VNE2)

C46*2-120 (VNVC) - C46*2-97 (VNE2)

 W - R Power source of nozzle vane position sensor Engine switch on (IG) 4.5 to 5.5 V

C45*1-74 (VNA) - C45*1-97 (VNE2)

C46*2-74 (VNA) - C46*2-97 (VNE2)

 BR - R Nozzle vane position sensor (for bank 1) Engine switch on (IG) 2.3 to 2.7 V

C45*1-117 (VNA2) - C45*1-97 (VNE2)

C46*2-117 (VNA2) - C46*2-97 (VNE2)

 B - R Nozzle vane position sensor (for bank 2) Engine switch on (IG) 2.3 to 2.7 V

C45*1-122 (THCF) - C45*1-99 (ETCF)

C46*2-122 (THCF) - C46*2-99 (ETCF)

 L - BR Exhaust gas temperature sensor (B1S1) Engine warmed up, idling 4.6 to 4.9 V

C45*1-121 (THCI) - C45*1-99 (ETCF)

C46*2-121 (THCI) - C46*2-99 (ETCF)

 G-Y - BR No. 2 Exhaust gas temperature sensor (B1S2) Engine warmed up, idling 4.6 to 4.9 V

C45*1-123 (THCO) - C45*1-99 (ETCF)

C46*2-123 (THCO) - C46*2-99 (ETCF)

 W - BR No. 4 Exhaust gas temperature sensor (B1S3) Engine warmed up, idling 4.6 to 4.9 V

C45*1-68 (TCF2) - C45*1-99 (ETCF)

C46*2-68 (TCF2) - C46*2-99 (ETCF)

 G-B - BR Exhaust gas temperature sensor (B2S1) Engine warmed up, idling 4.6 to 4.9 V

C45*1-98 (TCI2) - C45*1-99 (ETCF)

C46*2-98 (TCI2) - C46*2-99 (ETCF)

 P-L - BR No. 3 Exhaust gas temperature sensor (B2S2) Engine warmed up, idling 4.6 to 4.9 V

C45*1-124 (TCO2) - C45*1-99 (ETCF)

C46*2-124 (TCO2) - C46*2-99 (ETCF)

 P-L - BR No. 4 Exhaust gas temperature sensor (B2S3) Engine warmed up, idling 4.6 to 4.9 V

C45*1-83 (FIV) - C45*1-81 (E1)

C46*2-83 (FIV) - C46*2-81 (E1)

 W - BR Exhaust fuel addition injector assembly (for bank 1) Exhaust fuel addition injector assembly (for bank 1) operating Pulse generation

C45*1-84 (FIV2) - C45*1-81 (E1)

C46*2-84 (FIV2) - C46*2-81 (E1)

 G - BR Exhaust fuel addition injector assembly (for bank 2) Exhaust fuel addition injector assembly (for bank 2) operating Pulse generation

C45*1-45 (HA1A) - C45*1-44 (E04)

C46*2-45 (HA1A) - C46*2-44 (E04)

 L - BR Air fuel ratio sensor heater (for bank 1) Engine switch on (IG) Pulse generation

C45*1-102 (A1A+) - C45*1-44 (E04)

C46*2-102 (A1A+) - C46*2-44 (E04)

 G - BR Air fuel ratio sensor (for bank 1) Engine switch on (IG) 2.0 to 2.5 V

C45*1-103 (A1A-) - C45*1-44 (E04)

C46*2-103 (A1A-) - C46*2-44 (E04)

 R - BR Air fuel ratio sensor (for bank 1) Engine switch on (IG) 2.0 to 2.5 V

C45*1-46 (HA2A) - C45*1-23 (E05)

C46*2-46 (HA2A) - C46*2-23 (E05)

 L - W-B Air fuel ratio sensor heater (for bank 2) Engine switch on (IG) Pulse generation

C45*1-125 (A2A+) - C45*1-23 (E05)

C46*2-125 (A2A+) - C46*2-23 (E05)

 G - W-B Air fuel ratio sensor (for bank 2) Engine switch on (IG) 2.0 to 2.5 V

C45*1-126 (A2A-) - C45*1-23 (E05)

C46*2-126 (A2A-) - C46*2-23 (E05)

 R - W-B Air fuel ratio sensor (for bank 2) Engine switch on (IG) 2.0 to 2.5 V

C45*1-69 (PEX) - C45*1-92 (E2)

C46*2-69 (PEX) - C46*2-92 (E2)

 R - BR Differential pressure sensor (for bank 1) Engine switch on (IG) 0.4 to 4.8 V

C45*1-70 (PEX2) - C45*1-92 (E2)

C46*2-70 (PEX2) - C46*2-92 (E2)

 R - BR Differential pressure sensor (for bank 2) Engine switch on (IG) 0.4 to 4.8 V

Tech Tips


  • *1: for LHD

  • *2: for RHD


  1. WAVEFORM 1

    A01X6SJE24
    *a 5 V/DIV.
    *b 20 msec./DIV.
    Injector Assembly No. 1 (to No. 8) Injection Signal
    ECM Terminal Name From #1 to #8 and E1
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  2. WAVEFORM 2

    A01XBOOE21
    *a 10 V/DIV.
    *b 5 msec./DIV.
    Suction Control Valve Signal
    ECM Terminal Name PCV+ and PCV-
    Tester Range 10 V/DIV., 5 msec./DIV.
    Condition Idling or cranking with warm engine

    Tech Tips

    The waveform varies depending on the suction control valve operation.

  3. WAVEFORM 3

    A01X59CE13
    *a 2 V/DIV.
    *b 20 msec./DIV.
    Injector Injection Confirmation Signal
    ECM Terminal Name

    INJ1 and E1

    INJ2 and E1
    Tester Range 2 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the injector injection.

  4. WAVEFORM 4

    A01X9Q1E20
    *a 1 V/DIV.
    *b 2 msec./DIV.
    Diesel Throttle Motor Signal
    ECM Terminal Name

    LUSL and E1

    LUS2 and E1
    Tester Range 1 V/DIV., 2 msec./DIV.
    Condition Racing with warm engine

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  5. WAVEFORM 5

    A01X4ZAE01
    *a 5 V/DIV.
    *b 5 msec./DIV.
    EGR Position Sensor Signal
    ECM Terminal Name

    EGRS and E1

    ERS2 and E1
    Tester Range 5 V/DIV., 5 msec./DIV.
    Condition Idling

    Tech Tips

    The waveform varies depending on the throttle valve operation.

  6. WAVEFORM 6

    A01X1BVE03
    *a 5 V/DIV.
    *b 20 msec./DIV.
    DC Motor Positive Terminal Signal
    ECM Terminal Name

    M+ and E1

    VN2+ and E1
    Tester Range 5 V/DIV., 20 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger operation.

  7. WAVEFORM 7

    A01X5AQE04
    *a 5 V/DIV.
    *b 50 msec./ DIV.
    DC Motor Negative Terminal Signal
    ECM Terminal Name

    M- and E1

    VN2- and E1
    Tester Range 5 V/DIV., 50 msec./DIV.
    Condition Idling with warm engine

    Tech Tips

    The waveform varies depending on the turbocharger status.

  8. WAVEFORM 8

    A01XAR7E02
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Engine Speed Signal
    ECM Terminal Names TACH and E1
    Tester Range 5 V/DIV., 10 msec./DIV.
    Conditions Idling

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.

  9. WAVEFORM 9

    A01X2BFE23
    *a 5 V/DIV.
    *b 10 msec./DIV.
    Vehicle Speed Signal
    ECM Terminal Name SPD and E1
    Tester Range 5 V/DIV., 10 msec./DIV.
    Condition Driving at vehicle speed of 40 km/h (25 mph)

    Tech Tips

    The wavelength becomes shorter as the vehicle speed increases.

  10. WAVEFORM 10

    A01X1VPE25
    *a 1 V/DIV.
    *b 10 msec./DIV
    CAN Communication Signal
    ECM Terminal Name CAN+ and E1
    Tester Range 1 V/DIV., 10 msec./DIV.
    Condition Engine stopped, engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  11. WAVEFORM 11

    A01X6OKE25
    *a 1 V/DIV.
    *b 10 msec./DIV.
    CAN Communication Signal
    ECM Terminal Name CAN- and E1
    Tester Range 1 V/DIV., 10 msec./DIV.
    Condition Engine stopped, engine switch on (IG)

    Tech Tips

    The waveform varies depending on the CAN communication signal.

  12. WAVEFORM 12

    A01X4NFE09
    Pressure Discharge Valve Drive Signal and Pressure Discharge Confirmation Signal
    ECM Terminal Name

    (a) PRD and E1

    (b) RLFF and E1
    Tester Range 2 V/DIV., 1 msec./DIV.
    Condition Engine warmed up, engine racing

    Tech Tips

    The wavelength becomes shorter as the engine speed increases.