SFI SYSTEM(w/o Canister Pump Module) TERMINALS OF ECM
Tech Tips
The standard voltage, resistance and waveform between each pair of the ECM terminals is shown in the table below. The appropriate conditions for checking each pair of the terminals is also indicated. The result of checks should be compared with the standard voltage, resistance and waveform for each pair of the terminals as 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 |
|---|---|---|---|---|
| A50-1 (BATT) - A50-10 (E1) | G - W-B |
|
Always | 11 to 14 V |
| A50-2 (IGSW) - A50-10 (E1) | B - W-B | Ignition switch signal | Ignition switch ON | 11 to 14 V |
| A50-6 (FPC) - A50-10 (E1) | R - W-B | Fuel pump control | Ignition switch ON | Below 1.5 V |
| A50-8 (CANH) - A50-10 (E1) | B - W-B | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 1) |
| A50-9 (+B) - A50-10 (E1) | L - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A50-10 (E1) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A50-12 (PWMS) - A50-10 (E1) | LG - W-B | Drive mode switch (SPORT mode) | Ignition switch ON | 11 to 14 V |
| Ignition switch ON, SPORT mode switch being pushed and held at SPORT position (SPORT mode) | 0 to 1.5 V | |||
| A50-13 (SPCN) - A50-10 (E1) | V - W-B | Drive mode switch (NORMAL mode) | Ignition switch ON | 11 to 14 V |
| Ignition switch ON, NORMAL mode switch being pushed and held (NORMAL mode) | 0 to 1.5 V | |||
| A50-14 (S) - A50-10 (E1) | GR - W-B | S shift position switch signal | Ignition switch ON, shift lever in S | 11 to 14 V |
| Ignition switch ON, shift lever not in S | Below 1.5 V | |||
| A50-15 (MREL) - A50-10 (E1) | W - W-B | EFI-MAIN NO. 1 relay operation signal | Ignition switch ON | Below 1.5 V |
| A50-16 (NEO) - A50-10 (E1) | B - W-B | Engine speed signal sent to other ECUs | Idling with warm engine | Pulse generation (See waveform 2) |
| A50-18 (CANL) - A50-10 (E1) | W - W-B | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 3) |
| A50-21 (STP) - A50-10 (E1) | SB - W-B | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | 0 to 1.5 V | |||
| A50-22 (ST1-) - A50-10 (E1) | LG - W-B | Stop light switch assembly signal (opposite to STP terminal) |
Ignition switch ON, brake pedal depressed | 0 to 1.5 V |
| Ignition switch ON, brake pedal released | 7.5 to 14 V | |||
| A50-23 (NSW) - A50-10 (E1) | BE - W-B | Park/Neutral position switch assembly signal | Ignition switch ON, shift lever not in P or N | 11 to 14 V |
| Ignition switch ON, shift lever in P or N | Below 3.0 V | |||
| A50-30 (STA) - A50-10 (E1) | G - W-B | Starter assembly signal | Cranking | 6.0 V or higher |
| A50-32 (RFC) - A50-10 (E1) | LG - W-B | Cooling fan control signal | Ignition switch ON, A/C switch on (max cool) | Pulse generation (See waveform 4) |
| A50-34 (IREL) - A50-10 (E1) | P - W-B | D INJ relay operation signal | Ignition switch ON | Below 1.5 V |
| A50-35 (+B2) - A50-10 (E1) | L - W-B | Power source of ECM | Ignition switch ON | 11 to 14 V |
| A50-36 (E2) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A50-39 (KSW) - A50-10 (E1) | R - W-B | Electrical key in vehicle signal | Electrical key outside vehicle | 11 to 14 V |
| A50-42 (SPD) - A50-10 (E1) | L - W-B | Vehicle speed signal from combination meter assembly | Driving at 20 km/h (12 mph) | Pulse generation (See waveform 5) |
| A50-45 (EC) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A50-52 (TC) - A50-10 (E1) | GR - W-B | Terminal TC of DLC3 | Ignition switch ON | 11 to 14 V |
| A50-53 (+BD1) - A50-10 (E1) | W - W-B | Power source of ECU (injector driver) | Ignition switch ON | 11 to 14 V |
| A50-54 (E1D1) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A50-55 (VPA) - A50-56 (EPA) | G - L | Accelerator pedal position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.5 to 1.1 V |
| Ignition switch ON, accelerator pedal fully depressed | 2.6 to 4.5 V | |||
| A50-57 (VCPA) - A50-56 (EPA) | BE - L | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| A50-58 (VPA2) - A50-59 (EPA2) | GR - P | Accelerator pedal position sensor signal | Ignition switch ON, accelerator pedal fully released | 1.2 to 2.0 V |
| Ignition switch ON, accelerator pedal fully depressed | 3.4 to 4.75 V | |||
| A50-60 (VCP2) - A50-59 (EPA2) | SB - P | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| C48-23 (D) - A50-10 (E1) | R - W-B | D shift position switch signal | Ignition switch ON, shift lever in D or S | 11 to 14 V |
| Ignition switch ON, shift lever not in D or S | Below 1 V | |||
| C48-24 (N) - A50-10 (E1) | LG - W-B | N shift position switch signal | Ignition switch ON, shift lever in N | 11 to 14 V |
| Ignition switch ON, shift lever not in N | Below 1 V | |||
| C48-25 (R) - A50-10 (E1) | W - W-B | R shift position switch signal | Ignition switch ON, shift lever in R | 11 to 14 V |
| Ignition switch ON, shift lever not in R | Below 1 V | |||
| C48-26 (P) - A50-10 (E1) | B - W-B | P shift position switch signal | Ignition switch ON, shift lever in P | 11 to 14 V |
| Ignition switch ON, shift lever not in P | Below 1 V | |||
| C24-1 (M-) - A50-10 (E1) | L - W-B | Throttle actuator operation signal (negative signal) | Idling with warm engine | Pulse generation (See waveform 6) |
| C24-2 (M+) - A50-10 (E1) | B - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (See waveform 7) |
| C24-3 (EGA+) - A50-10 (E1) | R - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C24-4 (EGA-) - A50-10 (E1) | L - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C24-5 (EGB-) - A50-10 (E1) | V - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C24-6 (EGB+) - A50-10 (E1) | GR - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C24-7 (HTHM) - A50-10 (E1) | G - W-B | Thermostat heater (water inlet with thermostat sub-assembly) operation signal | Ignition switch ON | 11 to 14 V |
| C24-8 (HA1B) - A50-10 (E1) | R - W-B | Air fuel ratio sensor (sensor 2) heater operation signal | Ignition switch ON | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 9) |
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| C24-9 (HA1A) - A50-10 (E1) | L - W-B | Air fuel ratio sensor (sensor 1) heater operation signal | Ignition switch ON | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 10) |
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| C24-10 (#2D-) - A50-10 (E1) | G - W-B | Direct fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-11 (#2D+) - A50-10 (E1) | L - W-B | Direct fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-12 (#3D+) - A50-10 (E1) | W - W-B | Direct fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-13 (#3D-) - A50-10 (E1) | R - W-B | Direct fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-14 (#4D-) - A50-10 (E1) | V - W-B | Direct fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-15 (#4D+) - A50-10 (E1) | P - W-B | Direct fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-16 (#1D+) - A50-10 (E1) | W - W-B | Direct fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-17 (#1D-) - A50-10 (E1) | BR - W-B | Direct fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C24-18 (FP1-) - A50-10 (E1) | L - W-B | Fuel pump assembly (for high pressure side) signal | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C24-19 (FP1+) - A50-10 (E1) | G - W-B | Fuel pump assembly (for high pressure side) signal | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C24-20 (VOP-) - A50-10 (E1) | P - W-B | Oil pressure control valve operation signal | Idling with warm engine | Pulse generation (See waveform 13) |
| C24-21 (VOP+) - A50-10 (E1) | G - W-B | Oil pressure control valve operation signal | Idling with warm engine | Pulse generation (See waveform 13) |
| C24-26 (OE1+) - C24-25 (OE1-) | P - L | Cam timing oil control solenoid assembly operation signal | Idling | Pulse generation (See waveform 14) |
| C24-28 (EDT1) - A50-10 (E1) | P - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 15) |
| C24-41 (WSV2) - A50-10 (E1) | LG - W-B | Flow shutting valve (for ATF control) operation signal | Ignition switch ON | 11 to 14 V |
| C24-42 (WSV1) - A50-10 (E1) | W - W-B | Flow shutting valve (for heater control) operation signal | Ignition switch ON | 11 to 14 V |
| C24-44 (ACM) - A50-10 (E1) | G - W-B | Vacuum switching valve (for active control engine mount system) operation signal | Ignition switch ON | 11 to 14 V |
| C24-46 (IGT4) - A50-10 (E1) | B - W-B | No. 4 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C24-47 (IGT3) - A50-10 (E1) | P - W-B | No. 3 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C24-48 (IGT2) - A50-10 (E1) | V - W-B | No. 2 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C24-49 (IGT1) - A50-10 (E1) | W - W-B | No. 1 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C24-50 (WPO) - A50-10 (E1) | LG - W-B | Electric water pump assembly signal | Idling with warm engine | Pulse generation (See waveform 17) |
| C24-51 (WPI) - A50-10 (E1) | B - W-B | Electric water pump assembly signal | Idling with warm engine | Pulse generation (See waveform 18) |
| C24-66 (PRG) - A50-10 (E1) | P - W-B | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation (See waveform 19) |
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| C24-70 (EMR1) - A50-10 (E1) | LG - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 20) |
| C24-71 (EMF1) - A50-10 (E1) | B - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Below 5.0 V |
| C24-72 (EMD1) - A50-10 (E1) | L - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 21) |
| C24-73 (#40) - A50-10 (E1) | P - W-B | Port fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 22) |
| C24-74 (#30) - A50-10 (E1) | W - W-B | Port fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 22) |
| C24-75 (#20) - A50-10 (E1) | G - W-B | Port fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 22) |
| C24-76 (#10) - A50-10 (E1) | B - W-B | Port fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 22) |
| C24-78 (VCVG) - A50-10 (E1) | R - W-B | Power source of mass air flow meter sub-assembly (specific voltage) | Ignition switch ON | 4.8 to 5.2 V |
| C24-84 (VCPF) - A50-10 (E1) | LG - W-B | Power source of fuel pressure sensor (fuel delivery pipe with sensor assembly) (for low pressure side) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-87 (VTA2) - C24-110 (ETA) | V - G | Throttle position sensor signal (for sensor malfunction detection) | Ignition switch ON, accelerator pedal fully released | 2.1 to 3.1 V |
| Accelerator pedal fully depressed (engine running) | 4.6 to 5.0 V | |||
| C24-88 (VCV1) - A50-10 (E1) | L - W-B | Power source of camshaft position sensor (for intake camshaft) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-90 (VV1+) - C24-89 (VV1-) | B - LG | Camshaft position sensor (for intake camshaft) signal | Idling with warm engine | Pulse generation (See waveform 23) |
| C24-91 (EV1+) - C24-114 (EV1-) | V - G | Camshaft position sensor (for exhaust camshaft) signal | Idling with warm engine | Pulse generation (See waveform 23) |
| C24-93 (NE+) - C24-115 (NE-) | L - P | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 24) |
| C24-94 (A1A-) - A50-10 (E1) | G - W-B | Air fuel ratio sensor (sensor 1) signal | Ignition switch ON | 1.24 to 4.22 V |
| C24-95 (A1A+) - A50-10 (E1) | R - W-B | Air fuel ratio sensor (sensor 1) signal | Ignition switch ON | 1.46 to 4.22 V |
| C24-97 (PR) - C24-96 (EPR) | L - V | Fuel pressure sensor (for high pressure side) signal | Idling with warm engine | 0.5 to 4.5 V |
| C24-98 (VCPR) - C24-96 (EPR) | LG - V | Power source of fuel pressure sensor (for high pressure side) (specific voltage) | Ignition switch ON | 4.75 to 5.25 V |
| C24-99 (VCPE) - C24-100 (EPEO) | R - G | Power source of engine oil pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-101 (VG) - C24-79 (E2G) | W - G | Mass air flow meter sub-assembly signal | Ignition switch ON | Pulse generation (See waveform 25) |
| C24-102 (THA) - C24-79 (E2G) | V - G | Intake air temperature sensor (mass air flow meter sub-assembly) signal | Idling, intake air temperature 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| C24-107 (PFL) - C24-61 (EPFL) | V - L | Fuel pressure sensor (fuel delivery pipe with sensor assembly) (for low pressure side) signal | Idling with warm engine | 0.75 to 4.5 V |
| C24-108 (VTA1) - C24-110 (ETA) | P - G | Throttle position sensor signal (for engine control) | Ignition switch ON, accelerator pedal fully released | 0.6 to 1.1 V |
| Accelerator pedal fully depressed (engine running) | 3.2 to 4.8 V | |||
| C24-109 (VCTA) - C24-110 (ETA) | R - G | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-111 (KNK1) - C24-112 (EKNK) | B - W | Knock control sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 26) |
| C24-113 (VCE1) - A50-10 (E1) | L - W-B | Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-116 (VCNE) - A50-10 (E1) | V - W-B | Power source of crankshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C24-117 (A1B-) - A50-10 (E1) | W - W-B | Air fuel ratio sensor (sensor 2) signal | Ignition switch ON | 1.17 to 4.49 V |
| C24-118 (A1B+) - A50-10 (E1) | B - W-B | Air fuel ratio sensor (sensor 2) signal | Ignition switch ON | 1.53 to 5.96 V |
| C24-120 (PIM) - C24-119 (EPIM) | P - G | Manifold absolute pressure sensor signal | Ignition switch ON | 3.0 to 4.5 V |
| C24-121 (VCPM) - C24-119 (EPIM) | B - G | Power source of manifold absolute pressure sensor (specific voltage) | Ignition switch ON | 4.75 to 5.25 V |
| C24-122 (PEO) - C24-100 (EPEO) | W - G | Oil pressure sensor signal | Idling with warm engine | 0.5 to 4.5 V |
| C24-123 (THEO) - C24-104 (ETHE) | V - W | Engine oil temperature sensor signal | Ignition switch ON | 0.14 to 4.93 V |
| C24-125 (THW) - C24-124 (ETHW) | L - P | Engine coolant temperature sensor signal | Idling, engine coolant temperature 75 to 100°C (167 to 212°F) | 0.2 to 1.0 V |
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WAVEFORM 1
*a 1 V/DIV. *b 10 μs./DIV. CAN Communication Signal (Reference) ECM Terminal Name Between CANH and E1 Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 2
*a 2 V/DIV. *b 2 ms./DIV. Engine Speed Signal ECM Terminal Name Between NEO and E1 Tester Range 2 V/DIV., 2 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 3
*a 1 V/DIV. *b 10 μs./DIV. CAN Communication Signal (Reference) ECM Terminal Name Between CANL and E1 Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON Tech Tips
The waveform varies depending on the CAN communication signal.
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WAVEFORM 4
*a 1 V/DIV. *b 20 ms./DIV. Cooling Fan Control Signal ECM Terminal Name Between RFC and E1 Tester Range 1 V/DIV., 20 ms./DIV. Condition Ignition switch ON, A/C switch on (max cool) Tech Tips
The duty ratio varies depending on the engine coolant temperature.
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WAVEFORM 5
*a 2 V/DIV. *b 20 ms./DIV. Vehicle Speed Signal ECM Terminal Name Between SPD and E1 Tester Range 2 V/DIV., 20 ms./DIV. Condition Driving at 20 km/h (12 mph) Tech Tips
The wavelength becomes shorter as the vehicle speed increases.
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WAVEFORM 6
*a 5 V/DIV. *b 1 ms./DIV. Throttle Actuator Operation Signal (Negative Terminal) ECM Terminal Name Between M- and E1 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the throttle actuator operation.
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WAVEFORM 7
*a 5 V/DIV. *b 1 ms./DIV. Throttle Actuator Operation Signal (Positive Terminal) ECM Terminal Name Between M+ and E1 Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the throttle actuator operation.
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WAVEFORM 8
EGR Valve Assembly Operation Signal ECM Terminal Name CH1: Between EGA+ and E1
CH2: Between EGA- and E1
CH1: Between EGB+ and E1
CH2: Between EGB- and E1
Tester Range 5 V/DIV., 5 μs./DIV. Condition Idling with warm engine Tech Tips
When the EGR valve assembly is operating, a waveform is produced at each terminal.
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WAVEFORM 9
*a 5 V/DIV. *b 10 ms./DIV. Air Fuel Ratio Sensor (Sensor 2) Heater Operation Signal ECM Terminal Name Between HA1B and E1 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with cold engine -
WAVEFORM 10
*a 5 V/DIV. *b 10 ms./DIV. Air Fuel Ratio Sensor (Sensor 1) Heater Operation Signal ECM Terminal Name Between HA1A and E1 Tester Range 5 V/DIV., 10 ms./DIV. Condition Idling with cold engine -
WAVEFORM 11
*1 50 V/DIV. *2 200 μs./DIV. No. 1 (to No. 4) Direct Fuel Injector Assembly Signal ECM Terminal Name CH1: Between #1D+ and E1
CH2: Between #1D- and E1
CH1: Between #2D+ and E1
CH2: Between #2D- and E1
CH1: Between #3D+ and E1
CH2: Between #3D- and E1
CH1: Between #4D+ and E1
CH2: Between #4D- and E1
Tester Range 50 V/DIV., 200 μs./DIV. Condition Idling with warm engine, Data List item "Injection Mode" displaying "Direct" -
WAVEFORM 12
*1 20 V/DIV. *2 500 μs./DIV. Fuel Pump Assembly (for High Pressure Side) Signal ECM Terminal Name CH1: Between FP1+ and E1
CH2: Between FP1- and E1
Tester Range 20 V/DIV., 500 μs./DIV. Condition Idling with warm engine, Data List item "Injection Mode" displaying "Direct" -
WAVEFORM 13
*a 5 V/DIV. *b VOP+ *c VOP- *d 20 ms./DIV. Oil Pressure Control Valve Operation Signal ECM Terminal Name CH1: Between VOP+ and E1
CH2: Between VOP- and E1
Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine -
WAVEFORM 14
*a 5 V/DIV. *b 1 ms./DIV. Cam Timing Oil Control Solenoid Assembly Operation Signal ECM Terminal Name Between OE1+ and OE1- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling -
WAVEFORM 15
*a 1 V/DIV. *b 5 ms./DIV. Cam Timing Control Motor with EDU Assembly Signal (EDT Signal) ECM Terminal Name Between EDT1 and E1 Tester Range 1 V/DIV., 5 ms./DIV. Condition Idling with warm engine -
WAVEFORM 16
*a 5 V/DIV. *b 20 ms./DIV. Ignition Coil Assembly Signal (IGT Signal) ECM Terminal Name Between IGT (1 to 4) and E1 Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 17
*a 5 V/DIV. *b 20 ms./DIV. Engine Water Pump Assembly Signal (from ECM to Engine Water Pump Assembly) ECM Terminal Name Between WPO and E1 Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The duty ratio varies depending on the engine water pump assembly speed.
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WAVEFORM 18
*a 5 V/DIV. *b 20 ms./DIV. Engine Water Pump Assembly Signal (from Engine Water Pump Assembly to ECM) ECM Terminal Name Between WPI and E1 Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine water pump assembly speed increases.
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WAVEFORM 19
*1 10 V/DIV. *2 20 ms./DIV. Purge VSV Operation Signal ECM Terminal Name Between PRG and E1 Tester Range 10 V/DIV., 20 ms./DIV. Condition Idling with warm engine, under purge control Tech Tips
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
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WAVEFORM 20
*a 2 V/DIV. *b 5 ms./DIV. Cam Timing Control Motor with EDU Assembly Signal (EMR Signal) ECM Terminal Name Between EMR1 and E1 Tester Range 2 V/DIV., 5 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 21
*a 2 V/DIV. *b 100 ms./DIV. Cam Timing Control Motor with EDU Assembly Signal (EMD Signal) ECM Terminal Name Between EMD1 and E1 Tester Range 2 V/DIV., 100 ms./DIV. Condition Idling with warm engine -
WAVEFORM 22
*1 20 V/DIV. *2 20 ms./DIV. No. 1 (to No. 4) Port Fuel Injector Assembly Signal ECM Terminal Name Between #10 (to #40) and E1 Tester Range 20 V/DIV., 20 ms./DIV. Condition Idling with warm engine (Data List item "Injection Mode" displaying "Port") Tech Tips
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The wavelength becomes shorter as the engine speed increases.
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When the port injection injectors are operating, Port is displayed for Injection Mode of the Data List.
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WAVEFORM 23
*a 5 V/DIV. *b 20 ms./DIV. Camshaft Position Sensor Signal ECM Terminal Name CH1: Between VV1+ and VV1-
CH2: Between EV1+ and EV1-
Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 24
*a 2 V/DIV. *b 20 ms./DIV. Crankshaft Position Sensor Signal ECM Terminal Name Between NE+ and NE- Tester Range 2 V/DIV., 20 ms./DIV. Condition Idling with warm engine Tech Tips
The wavelength becomes shorter as the engine speed increases.
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WAVEFORM 25
*a 1 V/DIV. *b 100 μs./DIV. Mass Air Flow Meter Sub-assembly Signal ECM Terminal Name Between VG and E2G Tester Range 1 V/DIV., 100 μs./DIV. Condition Ignition switch ON -
WAVEFORM 26
*a 1 V/DIV. *b 1 ms./DIV. Knock Control Sensor Signal ECM Terminal Name Between KNK1 and EKNK Tester Range 1 V/DIV., 1 ms./DIV. Condition Engine speed maintained at 4000 rpm after warming up engine Tech Tips
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The wavelength becomes shorter as the engine speed increases.
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The waveforms and amplitudes displayed differ slightly depending on the vehicle.
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