Lexus ES: Terminals Of Ecm
TERMINALS OF ECM
HINT:
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 |
|---|---|---|---|---|
| A25-1 (BATT) - C32-53 (E1) | R - W-B | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 V |
| A25-2 (+B) - C32-53 (E1) | L - W-B | Power source of ECM | Engine switch on (IG) | 11 to 14 V |
| A25-3 (+B2) - C32-53 (E1) | L - W-B | Power source of ECM | Engine switch on (IG) | 11 to 14 V |
| A25-4 (IGSW) - C32-53 (E1) | B - W-B | Engine switch signal | Engine switch on (IG) | 11 to 14 V |
| A25-7 (IREL) - C32-53 (E1) | P - W-B | D INJ relay operation signal | Engine stopped, engine switch on (IG) | 0 to 1.5 V |
| A25-8 (+BM) - C32-53 (E1) | G - W-B | Power source of throttle actuator | Always | 11 to 14 V |
| A25-13 (CANH) - C32-53 (E1) | B - W-B | CAN communication line | Engine stopped, engine switch on (IG) | Pulse generation (See waveform 1) |
| A25-14 (EC) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A25-17 (S) - C32-53 (E1) | GR - W-B | S shift position switch signal | Engine switch on (IG) and shift lever in S | 11 to 14 V |
| Engine switch on (IG) and shift lever not in S | Below 1 V | |||
| A25-18 (FPC) - C32-53 (E1) | R - W-B | Fuel pump control | Engine stopped, engine switch on (IG) | Below 1.5 V |
| A25-19 (VPMP) - C32-53 (E1) | L - W-B | Vent valve (built into canister pump module) | Engine switch on (IG) | 11 to 14 V |
| A25-21 (MPMP) - C32-53 (E1) | V - W-B | Leak detection pump (built into canister pump module) | Leak detection pump OFF | Below 3 V |
| Leak detection pump ON | 11 to 14 V | |||
| A25-26 (CANL) - C32-53 (E1) | W - W-B | CAN communication line | Engine stopped, engine switch on (IG) | Pulse generation (See waveform 2) |
| A25-27 (STP) - C32-53 (E1) | SB - W-B | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | Below 1.5 V | |||
| A25-30 (NEO) - C32-53 (E1) | B - W-B | Engine speed signal sent to other ECUs | Idling with warm engine | Pulse generation (See waveform 3) |
| A25-33 (TC) - C32-53 (E1) | GR - W-B | Terminal TC of DLC3 | Engine stopped, engine switch on (IG) | 11 to 14 V |
| A25-35 (VCPP) - A25-34 (EPPM) | V - LG | Power source for canister pressure sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| A25-36 (PPMP) - A25-34 (EPPM) | BE - LG | Canister pressure sensor (built into canister pump module) | Engine switch on (IG) | 3.0 to 3.6 V |
| A25-39 (SPD) - C32-53 (E1) | L - W-B | Vehicle speed signal from combination meter assembly | Driving at 20 km/h (12 mph) | Pulse generation (See waveform 4) |
| A25-40 (SPCN) - C32-53 (E1) | P - W-B | Drive mode switch (NORMAL mode) | Engine switch on (IG) | 11 to 14 V |
| Engine switch on (IG), NORMAL mode switch being pushed and held (NORMAL mode) | 0 to 1.5 V | |||
| A25-42 (ST1-) - C32-53 (E1) | LG - W-B | Stop light switch assembly signal (opposite to STP terminal) | Engine switch on (IG), brake pedal depressed | 0 to 1.5 V |
| Engine switch on (IG), brake pedal released | 7.5 to 14 V | |||
| A25-43 (STA) - C32-53 (E1) | G - W-B | Starter assembly signal | Cranking | 6.0 V or higher |
| A25-46 (MREL) - C32-53 (E1) | W - W-B | EFI MAIN relay operation signal | Engine switch on (IG) | 11 to 14 V |
| A25-47 (VPA) - A25-48 (EPA) | G - L | Accelerator pedal position sensor signal (for engine control) | Engine switch on (IG), accelerator pedal fully released | 0.5 to 1.1 V |
| Engine switch on (IG), accelerator pedal fully depressed | 2.6 to 4.5 V | |||
| A25-49 (VCPA) - A25-48 (EPA) | BE - L | Power source of accelerator pedal position sensor (for VPA) | Engine stopped, engine switch on (IG) | 4.5 to 5.5 V |
| A25-50 (VPA2) - A25-51 (EPA2) | GR - P | Accelerator pedal position sensor signal | Engine switch on (IG), accelerator pedal fully released | 1.2 to 2.0 V |
| Engine switch on (IG), accelerator pedal fully depressed | 3.4 to 4.75 V | |||
| A25-52 (VCP2) - A25-51 (EPA2) | SB - P | Power source of accelerator pedal position sensor (for VPA2) | Engine stopped, engine switch on (IG) | 4.5 to 5.5 V |
| A25-55 (PWMS) - C32-53 (E1) | LG - W-B | Drive mode switch (SPORT mode) | Engine switch on (IG) | 11 to 14 V |
| Engine switch on (IG), SPORT mode switch being pushed and held at SPORT position (SPORT mode) | 0 to 1.5 V | |||
| A25-58 (KSW) - C32-53 (E1) | R - W-B | Key in vehicle signal | Engine switch off → on (IG) | 0 to 3.0 V |
| C32-2 (OE2+) - C32-3 (OE2-) | R - W | Cam timing oil control solenoid assembly (for exhaust camshaft of bank 2) operation signal | Idling | Pulse generation (See waveform 5) |
| C32-4 (OE1+) - C32-5 (OE1-) | G - R | Cam timing oil control solenoid assembly (for exhaust camshaft of bank 1) operation signal | Idling | Pulse generation (See waveform 5) |
| C32-9 (OC2+) - C32-8 (OC2-) | B - L | Cam timing oil control solenoid assembly (for intake camshaft of bank 2) operation signal | Idling | Pulse generation (See waveform 6) |
| C32-16 (HT2B) - C32-53 (E1) | L - W-B | Heated oxygen sensor (bank 2 sensor 2) heater operation signal | Idling | Below 3.0 V |
| Engine switch on (IG) | 11 to 14 V | |||
| C32-17 (HA2A) - C32-46 (E05) | R - W-B | Air fuel ratio sensor (bank 2 sensor 1) heater operation signal | Idling | Pulse generation (See waveform 7) |
| Engine switch on (IG) | 11 to 14 V | |||
| C32-18 (+BD2) - C32-53 (E1) | L - W-B | Power source of ECM (injector driver) | Engine stopped, engine switch on (IG) | 11 to 14 V |
| C32-19 (+BD1) - C32-53 (E1) | L-R - W-B | Power source of ECM (injector driver) | Engine stopped, engine switch on (IG) | 11 to 14 V |
| C32-20 (E02) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-21 (E04) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-23 (FP1+) - C32-22 (FP1-) | Y - L | Fuel pump assembly (for high pressure side) signal | Idling with warm engine | Pulse generation |
| C32-24 (#6D+) - C32-54 (#6D-) | L - Y | Direct fuel injector assembly (No. 6 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-25 (#3D+) - C32-26 (#3D-) | V - P | Direct fuel injector assembly (No. 3 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-27 (#5D+) - C32-57 (#5D-) | L - Y | Direct fuel injector assembly (No. 5 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-28 (#2D+) - C32-58 (#2D-) | G - BR | Direct fuel injector assembly (No. 2 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-29 (#4D+) - C32-59 (#4D-) | V - P | Direct fuel injector assembly (No. 4 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-30 (#1D+) - C32-60 (#1D-) | B - W | Direct fuel injector assembly (No. 1 cylinder) signal | Idling with warm engine, Data List item "Injection Mode" displays "Direct" | Pulse generation |
| C32-34 (IGT6) - C32-53 (E1) | V - W-B | No. 6 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-35 (IGT4) - C32-53 (E1) | B - W-B | No. 4 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-36 (IGT2) - C32-53 (E1) | GR - W-B | No. 2 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-38 (OC1+) - C32-68 (OC1-) | W - G | Cam timing oil control solenoid assembly (for intake camshaft of bank 1) operation signal | Idling | Pulse generation (See waveform 6) |
| C32-39 (ACM) - C32-53 (E1) | GR - W-B | Vacuum switching valve (for active control engine mount system) operation signal | Engine switch on (IG) | 11 to 14 V |
| C32-40 (#60) - C32-51 (E01) | G - W-B | Port fuel injector assembly (No. 6 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-41 (#30) - C32-51 (E01) | B - W-B | Port fuel injector assembly (No. 3 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-42 (#50) - C32-51 (E01) | R - W-B | Port fuel injector assembly (No. 5 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-43 (#20) - C32-51 (E01) | BE - W-B | Port fuel injector assembly (No. 2 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-44 (#40) - C32-51 (E01) | W - W-B | Port fuel injector assembly (No. 4 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-45 (#10) - C32-51 (E01) | GR - W-B | Port fuel injector assembly (No. 4 cylinder) signal | Engine switch on (IG) | 0 to 5 V |
| Idling with warm engine, Data List item "Injection Mode" displaying "Port" | Pulse generation (See waveform 9) | |||
| C32-46 (E05) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-47 (M-) - C32-49 (ME01) | P - W-B | Throttle actuator operation signal (negative signal) | Idling with warm engine | Pulse generation (See waveform 10) |
| C32-48 (M+) - C32-49 (ME01) | V - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (See waveform 11) |
| C32-49 (ME01) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-50 (HT1B) - C32-53 (E1) | L - W-B | Heated oxygen sensor (bank 1 sensor 2) heater operation signal | Idling | Below 3.0 V |
| Engine switch on (IG) | 11 to 14 V | |||
| C32-51 (E01) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-52 (HA1A) - C32-21 (E04) | B - W-B | Air fuel ratio sensor (bank 1 sensor 1) heater operation signal | Idling | Pulse generation (See waveform 7) |
| Engine switch on (IG) | 11 to 14 V | |||
| C32-53 (E1) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| C32-55 (E1D2) - Body ground | B - - | Ground | Always | Below 1 Ω |
| C32-56 (E1D1) - Body ground | W - - | Ground | Always | Below 1 Ω |
| C32-64 (PTCR) - C32-53 (E1) | L - W-B | Thermostat heater operation signal | Engine switch on (IG) | 11 to 14 V |
| C32-65 (PRG) - C32-53 (E1) | R - W-B | Purge VSV operation signal | Engine switch on (IG) | 11 to 14 V |
| Idling | Pulse generation (See waveform 12) | |||
| C32-66 (ACIS) - C32-53 (E1) | L - W-B | No. 1 vacuum switching valve (for intake air control valve sub-assembly) operation signal | Engine switch on (IG) | 11 to 14 V |
| C32-69 (IGT5) - C32-53 (E1) | R - W-B | No. 5 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-70 (IGT3) - C32-53 (E1) | L - W-B | No. 3 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-71 (IGT1) - C32-53 (E1) | GR - W-B | No. 1 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C32-80 (IGF2) - C32-53 (E1) | LG - W-B | Ignition coil assembly (ignition confirmation signal) | Engine switch on (IG) | 4.5 to 5.5 V |
| Idling with warm engine | Pulse generation (See waveform 8) | |||
| C32-82 (KNK1) - C32-81 (EKNK) | B - W | Knock control sensor (bank 1) signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 13) |
| C32-87 (PR) - C32-133 (ETHW) | P - BR | Fuel pressure sensor (for high pressure side) signal | Idling with warm engine | 0.5 to 4.5 V |
| C32-89 (VTA2) - C32-120 (ETA) | LG - B | Throttle position sensor signal (for sensor malfunction detection) | Engine switch on (IG), accelerator pedal fully released | 2.1 to 3.1 V |
| Accelerator pedal fully depressed (engine running) | 4.6 to 5.0 V | |||
| C32-90 (VC) - C32-53 (E1) | W - W-B | Power source for sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C32-91 (OX2B) - C32-92 (EX2B) | G - W | Heated oxygen sensor (bank 2 sensor 2) signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation (See waveform 14) |
| C32-93 (OX1B) - C32-94 (EX1B) | R - G | Heated oxygen sensor (bank 1 sensor 2) signal | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine | Pulse generation (See waveform 14) |
| C32-96 (VCNE) - C32-53 (E1) | R - W-B | Power source of crankshaft position sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C32-98 (VCV2) - C32-97 (VV2-) | R - B | Power source of VVT sensor (bank 2) (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C32-99 (VCV1) - C32-100 (VV1-) | W - R | Power source of VVT sensor (bank 1) (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C32-101 (THW) - C32-133 (ETHW) | B - BR | Engine coolant temperature sensor | Idling, engine coolant temperature 75 to 100°C (167 to 212°F) | 0.2 to 1.0 V |
| C32-102 (THA) - C32-115 (E2G) | L - LG | Intake air temperature sensor | Idling, intake air temperature 0 to 80°C (32 to 176°F) | 0.5 to 3.4 V |
| C32-106 (NSW) - C32-53 (E1) | R - W-B | Park/Neutral position switch assembly signal | Engine switch on (IG), shift lever not in P or N | 11 to 14 V |
| Engine switch on (IG), shift lever in P or N | Below 1 V | |||
| C32-107 (R) - C32-53 (E1) | W - W-B | R shift position switch signal | Engine switch on (IG), shift lever in R | 11 to 14 V |
| Engine switch on (IG), shift lever not in R | Below 1 V | |||
| C32-108 (P) - C32-53 (E1) | B - W-B | P shift position switch signal | Engine switch on (IG), shift lever in P | 11 to 14 V |
| Engine switch on (IG), shift lever not in P | Below 1 V | |||
| C32-112 (IGF1) - C32-53 (E1) | B - W-B | Ignition coil assembly (ignition confirmation signal) | Engine switch on (IG) | 4.5 to 5.5 V |
| Idling with warm engine | Pulse generation (See waveform 8) | |||
| C32-114 (KNK2) - C32-113 (EKN2) | R - G | Knock control sensor (bank 2) signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 13) |
| C32-116 (VG) - C32-115 (E2G) | R - LG | Mass air flow meter sub-assembly signal | Engine switch on (IG) | Pulse generation (See waveform 15) |
| C32-121 (VCTA) - C32-120 (ETA) | R - B | Power source of throttle position sensor (specific voltage) | Engine stopped, engine switch on (IG) | 4.5 to 5.5 V |
| C32-122 (VTA1) - C32-120 (ETA) | G - B | Throttle position sensor signal (for engine control) | Engine switch on (IG), accelerator pedal fully released | 0.6 to 1.1 V |
| Accelerator pedal fully depressed (engine running) | 3.2 to 4.8 V | |||
| C32-123 (A2A+) - C32-53 (E1) | P - W-B | Air fuel ratio sensor (bank 2 sensor 1) signal | Engine switch on (IG) | 3.3 V* |
| C32-124 (A2A-) - C32-53 (E1) | L - W-B | Air fuel ratio sensor (bank 2 sensor 1) signal | Engine switch on (IG) | 2.9 V* |
| C32-125 (A1A+) - C32-53 (E1) | Y - W-B | Air fuel ratio sensor (bank 1 sensor 1) signal | Engine switch on (IG) | 3.3 V* |
| C32-126 (A1A-) - C32-53 (E1) | BR - W-B | Air fuel ratio sensor (bank 1 sensor 1) signal | Engine switch on (IG) | 2.9 V* |
| C32-127 (GE01) - Body ground | BR - - | Shielded earth (ground) circuit of throttle actuator | Always | Below 1 Ω |
| C32-128 (NE+) - C32-95 (NE-) | L - B | Crankshaft position sensor | Idling with warm engine | Pulse generation (See waveform 16) |
| C32-129 (VV2+) - C32-97 (VV2-) | G - B | VVT sensor (for intake camshaft of bank 2) signal | Idling | Pulse generation (See waveform 17) |
| C32-130 (EV2+) - C32-97 (VV2-) | GR - B | VVT sensor (for exhaust camshaft of bank 2) signal | Idling | Pulse generation (See waveform 18) |
| C32-131 (EV1+) - C32-100 (VV1-) | B - R | VVT sensor (for exhaust camshaft of bank 1) signal | Idling | Pulse generation (See waveform 18) |
| C32-132 (VV1+) - C32-100 (VV1-) | G - R | VVT sensor (for intake camshaft of bank 1) signal | Idling | Pulse generation (See waveform 17) |
| C32-134 (PFL) - C32-133 (ETHW) | R - BR | Fuel pressure sensor (for low pressure side) signal | Idling with warm engine | 0.75 to 4.5 V |
| C32-136 (RFC) - C32-53 (E1) | LG - W-B | Cooling fan control signal | Engine switch on (IG), A/C switch on (max cool) | Pulse generation (See waveform 19) |
| C32-139 (D) - C32-53 (E1) | R - W-B | D shift position switch signal | Engine switch on (IG) and shift lever in D or S | 11 to 14 V |
| Engine switch on (IG) and shift lever not in D or S | Below 1 V | |||
| C32-140 (N) - C32-53 (E1) | LG - W-B | N shift position switch signal | Engine switch on (IG), shift lever in N | 11 to 14 V |
| Engine switch on (IG), shift lever not in N | Below 1 V |
*: The ECM terminal voltage is constant regardless of the voltage output from the sensor.
WAVEFORM 1
CAN Communication Signal (Reference) | ECM Terminal Name | Between CANH and E1 |
| Tester Range | 1 V/DIV., 10 μs./DIV. |
| Condition | Engine stopped, engine switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
WAVEFORM 2
CAN Communication Signal (Reference) | ECM Terminal Name | Between CANL and E1 |
| Tester Range | 1 V/DIV., 10 μs./DIV. |
| Condition | Engine stopped, engine switch on (IG) |
HINT:
The waveform varies depending on the CAN communication signal.
WAVEFORM 3
Engine Speed Signal | ECM Terminal Name | Between NEO and E1 |
| Tester Range | 1 V/DIV., 2 ms./DIV. |
| Condition | Idling with warm engine |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 4
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) |
HINT:
The wavelength becomes shorter as the vehicle speed increases.
WAVEFORM 5
Cam Timing Oil Control Solenoid Assembly (for Exhaust Camshaft) Signal | ECM Terminal Name | Between OE1+ and OE1- Between OE2+ and OE2- |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling |
WAVEFORM 6
Cam Timing Oil Control Solenoid Assembly (for Intake Camshaft) Signal | ECM Terminal Name | Between OC1+ and OC1- Between OC2+ and OC2- |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling |
WAVEFORM 7
Air Fuel Ratio Sensor Heater Operation Signal | ECM Terminal Name | Between HA1A and E04 Between HA2A and E05 |
| Tester Range | 5 V/DIV., 10 ms./DIV. |
| Condition | Idling |
WAVEFORM 8
Ignition Coil Assembly Signal (IGT and IGF Signal) | ECM Terminal Name | CH1: Between IGT (1 to 6) and E1 CH2: Between IGF (1 or 2) and E1 |
| Tester Range | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
WAVEFORM 9
No. 1 (to No. 6) Port Fuel Injector Assembly Signal | ECM Terminal Name | Between #10 (to #60) and E01 |
| Tester Range | 20 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine, Data List item "Injection Mode" displaying "Port" |
HINT:
- The wavelength becomes shorter as the engine speed increases.
- When the port fuel injectors are operating, Port is displayed for Injection Way of the Data List.
WAVEFORM 10
Throttle Actuator Negative Terminal Signal | ECM Terminal Name | Between M- and ME01 |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
HINT:
The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 11
Throttle Actuator Positive Terminal Signal | ECM Terminal Name | Between M+ and ME01 |
| Tester Range | 5 V/DIV., 1 ms./DIV. |
| Condition | Idling with warm engine |
HINT:
The duty ratio varies depending on the throttle actuator operation.
WAVEFORM 12
Purge VSV Operation Signal | ECM Terminal Name | Between PRG and E1 |
| Tester Range | 10 V/DIV., 20 ms./DIV. |
| Condition | Idling |
HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
WAVEFORM 13
Knock Control Sensor Signal | ECM Terminal Name | Between KNK1 and EKNK Between KNK2 and EKN2 |
| Tester Range | 1 V/DIV., 1 ms./DIV. |
| Condition | Engine speed maintained at 4000 rpm after warming up engine |
HINT:
- The wavelength becomes shorter as the engine speed increases.
- The waveforms and amplitudes displayed will differ slightly depending on the vehicle.
WAVEFORM 14
Heated Oxygen Sensor Signal | ECM Terminal Name | Between OX1B and EX1B Between OX2B and EX2B |
| Tester Range | 0.2 V/DIV., 200 ms./DIV. |
| Condition | Engine speed maintained at 2500 rpm for 2 minutes after warming up engine |
HINT:
Data List, item "O2 Sensor Voltage B1S2" and "O2 Sensor Voltage B2S2" shows the ECM values from the heated oxygen sensor.
WAVEFORM 15
Mass Air Flow Meter Sub-assembly Signal | ECM Terminal Name | Between VG and E2G |
| Tester Range | 1 V/DIV., 100 μs./DIV. |
| Condition | Engine switch on (IG) |
WAVEFORM 16
Crankshaft Position Sensor Signal | ECM Terminal Name | Between NE+ and NE- |
| Tester Range | 2 V/DIV., 20 ms./DIV. |
| Condition | Idling with warm engine |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 17
VVT Sensor (for Intake Camshaft) Signal | ECM Terminal Name | CH1: Between VV1+ and VV1- CH2: Between VV2+ and VV2- |
| Tester Range | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 18
VVT Sensor (for Exhaust Camshaft) Signal | ECM Terminal Name | CH1: Between EV1+ and VV1- CH2: Between EV2+ and VV2- |
| Tester Range | 5 V/DIV., 20 ms./DIV. |
| Condition | Idling |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 19
Cooling Fan Control Signal | ECM Terminal Name | Between RFC and E1 |
| Tester Range | 1 V/DIV., 20 ms./DIV. |
| Condition | Engine switch on (IG), A/C switch on (max cool) |
HINT:
The duty ratio varies depending on the engine coolant temperature.
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