Terminals Of ECM [11/2023 - ]
WARNING: This page is about a different car, the 2025 Toyota Highlander, 2024 Toyota Highlander, and 2023 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
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 are 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) | Terminal Description | Condition | Specified Condition |
|---|---|---|---|
| A83-1 (EC) - Body ground | Ground | Always | Below 1 Ω |
| A83-2 (MREL) - A83-9 (E1) | EFI-MAIN NO. 1 relay operation signal | Ignition switch ON | Below 1.5 V |
| A83-3 (IREL) - A83-9 (E1) | D INJ relay operation signal | Ignition switch ON | Below 1.5 V |
| A83-4 (FPC) - A83-9 (E1) | Fuel pump control | Engine stopped, ignition switch ON | Below 1.5 V |
| A83-6 (VPMP) - A83-9 (E1) | Vent valve (built into canister pump module) | Ignition switch ON | 11 to 14 V |
| A83-7 (MPMP) - A83-9 (E1) | Leak detection pump (built into canister pump module) | Leak detection pump OFF | Below 3 V |
| Leak detection pump ON | 11 to 14 V | ||
| A83-8 (IGP) - A83-9 (E1) | Ignition signal | Ignition switch ON | 11 to 14 V |
| A83-9 (E1) - Body ground | Ground | Always | Below 1 Ω |
| A83-10 (E03) - Body ground | Ground | Always | Below 1 Ω |
| A83-12 (ELS3) - Body ground | Idle up signal | Ignition switch ON, and load using 50 W or more connected to power outlet socket assembly | 4.0 V or more |
| A83-13 (ST1-) - A83-9 (E1) | 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 | ||
| A83-14 (STP) - A83-9 (E1) | Stop light switch assembly signal | Brake pedal depressed | 7.5 to 14 V |
| Brake pedal released | 0 to 1.5 V | ||
| A83-15 (NSW) - A83-9 (E1) | 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 | ||
| A83-16 (STA) - A83-9 (E1) | Starter assembly signal | Cranking | 6.0 V or higher |
| A83-19 (NEO) - A83-9 (E1) | Engine speed signal sent to other ECUs | Idling with warm engine | Pulse generation (See waveform 1) |
| A83-22 (IGR) - A83-9 (E1) | Ignition signal | Ignition switch ON | 11 to 14 V |
| A83-25 (CANL) - A83-9 (E1) | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 2) |
| A83-26 (CANH) - A83-9 (E1) | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 3) |
| A83-27 (SNWI) - A83-9 (E1) | SNOW mode switch signal | Ignition switch ON | 11 to 14 V |
| Ignition switch ON, SNOW mode switch being pushed and held | Below 1.5 V | ||
| A83-33 (CACL) - A83-9 (E1) | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 2) |
| A83-34 (CACH) - A83-9 (E1) | CAN communication line | Engine stopped, ignition switch ON | Pulse generation (See waveform 3) |
| A83-35 (E01) - Body ground | Ground | Always | Below 1 Ω |
| A83-36 (E05) - Body ground | Ground | Always | Below 1 Ω |
| A83-39 (D) - A83-9 (E1) | D shift position switch signal | Ignition switch ON and shift lever in D or M | 11 to 14 V |
| Ignition switch ON and shift lever not in D or M | Below 1 V | ||
| A83-40 (N) - A83-9 (E1) | N shift position switch signal | Ignition switch ON and shift lever in N | 11 to 14 V |
| Ignition switch ON and shift lever not in N | Below 1 V | ||
| A83-41 (R) - A83-9 (E1) | R shift position switch signal | Ignition switch ON and shift lever in R | 11 to 14 V |
| Ignition switch ON and shift lever not in R | Below 1 V | ||
| A83-42 (P) - A83-9 (E1) | P shift position switch signal | Ignition switch ON and shift lever in P | 11 to 14 V |
| Ignition switch ON and shift lever not in P | Below 1 V | ||
| A83-43 (S) - A83-9 (E1) | M shift position switch signal | Ignition switch ON and shift lever in M | 11 to 14 V |
| Ignition switch ON and shift lever not in M | Below 1 V | ||
| A83-45 (E0M) - Body ground | Ground | Always | Below 1 Ω |
| A83-48 (VCPP) - A83-47 (EPPM) | Power source for canister pressure sensor (built into canister pump module) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| A83-49 (PPMP) - A83-47 (EPPM) | Canister pressure sensor (built into canister pump module) | Ignition switch ON | 3.0 to 3.6 V |
| A83-53 (E02) - Body ground | Ground | Always | Below 1 Ω |
| A83-54 (E04) - Body ground | Ground | Always | Below 1 Ω |
| A83-55 (VPA) - A83-56 (EPA) | 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 | ||
| A83-57 (VCPA) - A83-56 (EPA) | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| A83-58 (VPA2) - A83-59 (EPA2) | 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 | ||
| A83-60 (VCP2) - A83-59 (EPA2) | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| C89-1 (BATT) - A83-9 (E1) | Battery (for measuring battery voltage and ECM memory) | Always | 11 to 14 V |
| C89-3 (VOP+) - A83-9 (E1) | Oil pressure control valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 4) |
| C89-4 (VOP-) - A83-9 (E1) | Oil pressure control valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 4) |
| C89-7 (HA1B) - A83-9 (E1) | Air fuel ratio sensor (sensor 2) heater operation signal | Ignition switch ON | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 5) |
||
| C89-8 (HA1A) - A83-9 (E1) | Air fuel ratio sensor (sensor 1) heater operation signal | Ignition switch ON | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 6) |
||
| C89-9 (+B4) - A83-9 (E1) | Power source of ECM | Ignition switch ON | 11 to 14 V |
| C89-10 (+B3) - A83-9 (E1) | Power source of ECM | Ignition switch ON | 11 to 14 V |
| C89-11 (+B2) - A83-9 (E1) | Power source of ECM | Ignition switch ON | 11 to 14 V |
| C89-12 (+B) - A83-9 (E1) | Power source of ECM | Ignition switch ON | 11 to 14 V |
| C89-13 (PLKC) - A83-9 (E1) | Shift lock release request signal | Ignition switch ON, brake pedal depressed | 11 to 14 V |
| Ignition switch ON, brake pedal released | 0 to 1.5 V | ||
| C89-14 (ACM) - A83-9 (E1) | No. 1 vacuum switching valve (for active control engine mount system) operation signal | Ignition switch ON | 11 to 14 V |
| C89-16 (PRG) - A83-9 (E1) | Purge VSV operation signal | Ignition switch ON | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation (See waveform 7) |
||
| C88-1 (M+) - A83-9 (E1) | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (See waveform 8) |
| C88-2 (M-) - A83-9 (E1) | Throttle actuator operation signal (negative signal) | Idling with warm engine | Pulse generation (See waveform 9) |
| C88-3 (FCM+) - A83-9 (E1) | Multi flow control ball valve operation signal | Multi flow control ball valve operating | Pulse generation |
| C88-4 (FCM-) - A83-9 (E1) | Multi flow control ball valve operation signal | Multi flow control ball valve operating | Pulse generation |
| C88-8 (OC1+) - C88-9 (OC1-) | Cam timing oil control solenoid assembly (for intake side) operation signal | Idling | Pulse generation (See waveform 10) |
| C88-10 (FP1-) - A83-9 (E1) | Fuel (engine room side) pump assembly (for high pressure side) signal | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C88-11 (FP1+) - A83-9 (E1) | Fuel (engine room side) pump assembly (for high pressure side) signal | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 11) |
| C88-12 (#3D-) - A83-9 (E1) | Direct fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-13 (#2D-) - A83-9 (E1) | Direct fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-15 (#4D-) - A83-9 (E1) | Direct fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-16 (#1D-) - A83-9 (E1) | Direct fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-18 (+BD3) - A83-9 (E1) | Battery (for measuring battery voltage and ECM memory) | Always | 11 to 14 V |
| C88-19 (+BD1) - A83-9 (E1) | Battery (for measuring battery voltage and ECM memory) | Always | 11 to 14 V |
| C88-20 (WGV+) - A83-9 (E1) | Vacuum regulating valve assembly operation signal | Vacuum regulating valve assembly operating | Pulse generation |
| C88-21 (WGV-) - A83-9 (E1) | Vacuum regulating valve assembly operation signal | Vacuum regulating valve assembly operating | Pulse generation |
| C88-27 (OE1+) - C88-28 (OE1-) | Cam timing oil control solenoid assembly (for exhaust side) operation signal | Idling | Pulse generation (See waveform 13) |
| C88-31 (#3D+) - A83-9 (E1) | Direct fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-32 (#2D+) - A83-9 (E1) | Direct fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-34 (#4D+) - A83-9 (E1) | Direct fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-35 (#1D+) - A83-9 (E1) | Direct fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine, Data List item "Injection Mode" displaying "Direct" | Pulse generation (See waveform 12) |
| C88-37 (+BD4) - A83-9 (E1) | Power source of ECU (injector driver) | Ignition switch ON | 11 to 14 V |
| C88-38 (+BD2) - A83-9 (E1) | Power source of ECU (injector driver) | Ignition switch ON | 11 to 14 V |
| C88-39 (#20) - A83-9 (E1) | Port fuel injector assembly signal (No. 2 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 14) |
| C88-40 (#30) - A83-9 (E1) | Port fuel injector assembly signal (No. 3 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 14) |
| C88-41 (#10) - A83-9 (E1) | Port fuel injector assembly signal (No. 1 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 14) |
| C88-42 (#40) - A83-9 (E1) | Port fuel injector assembly signal (No. 4 cylinder) | Idling with warm engine (Data List item "Injection Mode" displaying "Port") | Pulse generation (See waveform 14) |
| C88-43 (RFC) - A83-9 (E1) | Cooling fan control signal | Ignition switch ON, A/C switch on (max cool) | Pulse generation (See waveform 15) |
| C88-45 (IWPO) - A83-9 (E1) | Electric water pump assembly signal | Electric water pump assembly operating | Pulse generation |
| C88-46 (IWPI) - A83-9 (E1) | Electric water pump assembly signal | Electric water pump assembly operating | Pulse generation |
| C88-58 (IGT4) - A83-9 (E1) | No. 4 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C88-59 (IGT3) - A83-9 (E1) | No. 3 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C88-60 (IGT2) - A83-9 (E1) | No. 2 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C88-61 (IGT1) - A83-9 (E1) | No. 1 ignition coil assembly signal (ignition signal) |
Idling with warm engine | Pulse generation (See waveform 16) |
| C88-66 (PPC1) - C88-64 (E1PC) | Vacuum sensor signal | Idling with warm engine | 1.0 to 4.5 V |
| C88-70 (VCFV) - C88-71 (EFCV) | Power source of ball valve position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-72 (FCA) - C88-71 (EFCV) | Ball valve position sensor signal | Idling with warm engine | 0.73 to 4.27 V |
| C88-73 (VCVG) - A83-9 (E1) | Power source of mass air flow meter sub-assembly (specific voltage) | Ignition switch ON | 4.8 to 5.2 V |
| C88-75 (VG) - C88-74 (E2G) | Mass air flow meter sub-assembly signal | Ignition switch ON | Pulse generation (See waveform 17) |
| C88-76 (THA) - C88-74 (E2G) | 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 |
| C88-77 (PEO) - C88-100 (EPEO) | Oil pressure sensor signal | Idling with warm engine | 0.5 to 4.5 V |
| C88-78 (THW3) - C88-81 (ETHW) | Engine coolant temperature sensor (for water inlet housing side) signal | Idling, engine coolant temperature 75 to 115°C (167 to 239°F) | 0.2 to 1.0 V |
| C88-79 (THW2) - C88-81 (ETHW) | Engine coolant temperature sensor (for cylinder head side) signal | Idling, engine coolant temperature 75 to 115°C (167 to 239°F) | 0.2 to 1.0 V |
| C88-80 (THW) - C88-81 (ETHW) | Engine coolant temperature sensor (for outlet side) signal | Idling, engine coolant temperature 75 to 115°C (167 to 239°F) | 0.2 to 1.0 V |
| C88-82 (THIM) - A83-9 (E1) | Intake air temperature sensor (No. 1 turbo pressure sensor) signal | Idling with warm engine | 0 to 5.25 V |
| C88-83 (PIM) - C88-84 (EPIM) | No. 1 turbo pressure sensor signal | Idling with warm engine | 1.0 to 4.5 V |
| C88-86 (V1PC) - C88-64 (E1PC) | Power source of vacuum sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-87 (VTA2) - C88-110 (ETA) | 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 | ||
| C88-88 (VCV1) - A83-9 (E1) | Power source of camshaft position sensor (for intake camshaft) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-90 (VV1+) - C88-89 (VV1-) | Camshaft position sensor (for intake camshaft) signal | Idling with warm engine | Pulse generation (See waveform 18) |
| C88-91 (EV1+) - C88-114 (EV1-) | Camshaft position sensor (for exhaust camshaft) signal | Idling with warm engine | Pulse generation (See waveform 18) |
| C88-93 (NE+) - C88-115 (NE-) | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 19) |
| C88-94 (A1A-) - A83-9 (E1) | Air fuel ratio sensor (sensor 1) signal | Ignition switch ON | 1.24 to 4.22 V |
| C88-95 (A1A+) - A83-9 (E1) | Air fuel ratio sensor (sensor 1) signal | Ignition switch ON | 1.46 to 4.22 V |
| C88-96 (VCPR) - C88-97 (EPR) | Power source of pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-98 (PR) - C88-97 (EPR) | Fuel pressure sensor (for high pressure side) signal | Idling with warm engine | 0.5 to 4.5 V |
| C88-99 (THEO) - C88-100 (EPEO) | Engine oil temperature sensor signal | Ignition switch ON | 0.14 to 4.93 V |
| C88-101 (VCPE) - C88-100 (EPEO) | Power source of engine oil pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-102 (VPTA) - C88-125 (EPTA) | Power source of No. 2 turbo pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-107 (VCPM) - C88-84 (EPIM) | Power source of No. 1 turbo pressure sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-108 (VTA1) - C88-110 (ETA) | 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 | ||
| C88-109 (VCTA) - C88-110 (ETA) | Power source of throttle position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-112 (KNK1) - C88-111 (EKNK) | Knock control sensor signal | Engine speed maintained at 4000 rpm after warming up the engine | Pulse generation (See waveform 20) |
| C88-113 (VCE1) - A83-9 (E1) | Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-116 (VCNE) - A83-9 (E1) | Power source of crankshaft position sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-117 (A1B-) - A83-9 (E1) | Air fuel ratio sensor (sensor 2) signal | Ignition switch ON | 1.17 to 4.49 V |
| C88-118 (A1B+) - A83-9 (E1) | Air fuel ratio sensor (sensor 2) signal | Ignition switch ON | 1.53 to 5.96 V |
| C88-119 (VCPF) - A83-9 (E1) | Power source of No. 2 fuel pressure sensor (for low pressure side) (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| C88-121 (PFL) - C88-120 (EPFL) | No. 2 Fuel pressure sensor (for low pressure side) signal | Idling with warm engine | 0.75 to 4.5 V |
| C88-126 (PTA) - C88-125 (EPTA) | No. 2 turbo pressure sensor signal | Idling with warm engine | 1.0 to 4.5 V |
- WAVEFORM 1 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 2 CAN COMMUNICATION SIGNAL (REFERENCE)
ECM Terminal Name Between CANL and E1
Between CACL and E1Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON HINT:
The waveform varies depending on the CAN communication signal.
- WAVEFORM 3 CAN COMMUNICATION SIGNAL (REFERENCE)
ECM Terminal Name Between CANH and E1
Between CACH and E1Tester Range 1 V/DIV., 10 μs./DIV. Condition Engine stopped, ignition switch ON HINT:
The waveform varies depending on the CAN communication signal.
- WAVEFORM 4 OIL PRESSURE CONTROL VALVE ASSEMBLY OPERATION SIGNAL
ECM Terminal Name CH1: Between VOP+ and E1
CH2: Between VOP- and E1Tester Range 5 V/DIV., 20 ms./DIV. Condition Idling with warm engine - WAVEFORM 5 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 6 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 7 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 HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
- WAVEFORM 8 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 HINT:
The duty ratio varies depending on the throttle actuator operation.
- WAVEFORM 9 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 HINT:
The duty ratio varies depending on the throttle actuator operation.
- WAVEFORM 10 CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR INTAKE SIDE) OPERATION SIGNAL
ECM Terminal Name Between OC1+ and OC1- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling - WAVEFORM 11 FUEL (ENGINE ROOM SIDE) PUMP ASSEMBLY (FOR HIGH PRESSURE SIDE)
ECM Terminal Name CH1: Between FP1+ and E1
CH2: Between FP1- and E1Tester Range 20 V/DIV., 500 μs./DIV. Condition Idling with warm engine, Data List item "Injection Mode" displaying "Direct" - WAVEFORM 12 DIRECT FUEL INJECTOR ASSEMBLY SIGNAL
ECM Terminal Name CH1: Between #1D+ and E1
CH2: Between #1D- and E1CH1: Between #2D+ and E1
CH2: Between #2D- and E1CH1: Between #3D+ and E1
CH2: Between #3D- and E1CH1: Between #4D+ and E1
CH2: Between #4D- and E1Tester Range 50 V/DIV., 200 μs./DIV. Condition Idling with warm engine, Data List item "Injection Mode" displaying "Direct" - WAVEFORM 13 CAM TIMING OIL CONTROL SOLENOID ASSEMBLY (FOR EXHAUST SIDE) OPERATION SIGNAL
ECM Terminal Name Between OE1+ and OE1- Tester Range 5 V/DIV., 1 ms./DIV. Condition Idling - WAVEFORM 14 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") HINT:
- The wavelength becomes shorter as the engine speed increases.
- When the port injection injectors are operating, Port is displayed for Injection Mode of the Data List.
- WAVEFORM 15 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) HINT:
The duty ratio varies depending on the engine coolant temperature.
- WAVEFORM 16 IGNITION COIL ASSEMBLY SIGNAL (IGT SIGNAL)
ECM Terminal Name Between IGT (1 to 4) and E1 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 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 18 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 HINT:
The wavelength becomes shorter as the engine speed increases.
- WAVEFORM 19 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 20 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 the engine HINT:
- The wavelength becomes shorter as the engine speed increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.