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 |
|---|---|---|---|---|
| A28-1 (BATT) - A28-10 (E1) | G - W-B | Battery (for measuring battery voltage and ECM memory) | Always | 11 to 14 V |
| A28-2 (IGSW) - A28-10 (E1) | B - W-B | Engine switch signal | Engine switch on (IG) | 11 to 14 V |
| A28-3 (VPMP) - A28-10 (E1) | L - W-B | Vent valve (built into canister pump module) | Engine switch on (IG) | 11 to 14 V |
| A28-5 (MPMP) - A28-10 (E1) | V - W-B | Leak detection pump (canister pump module) | Leak detection pump OFF | Below 3 V |
| Leak detection pump ON | 11 to 14 V | |||
| A28-6 (FPC) - A28-10 (E1) | R - W-B | Fuel pump control | Engine switch on (IG) | Below 1.5 V |
| A28-8 (CANH) - A28-10 (E1) | B - W-B | CAN communication line | Engine stopped, engine switch on (IG) | Pulse generation (See waveform 1) |
| A28-9 (+B) - A28-10 (E1) | L - W-B |
| Engine switch on (IG) | 11 to 14 V |
| A28-10 (E1) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A28-12 (PWMS) - A28-10 (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 | |||
| A28-13 (SPCN) - A28-10 (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 | |||
| A28-14 (S) - A28-10 (E1) | GR - W-B | S shift position switch signal | Engine switch on (IG), shift lever in S | 11 to 14 V |
| Engine switch on (IG), shift lever not in S | Below 1.5 V | |||
| A28-15 (MREL) - A28-10 (E1) | W - W-B | EFI-MAIN NO. 1 relay operation signal | Engine switch on (IG) | Below 1.5 V |
| A28-16 (NEO) - A28-10 (E1) | B - W-B | Engine speed signal sent to other ECUs | Idling with warm engine | Pulse generation (See waveform 2) |
| A28-18 (CANL) - A28-10 (E1) | W - W-B | CAN communication line | Engine stopped, engine switch on (IG) | Pulse generation (See waveform 3) |
| A28-21 (STP) - A28-10 (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 | |||
| A28-22 (ST1-) - A28-10 (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 | |||
| A28-23 (NSW) - A28-10 (E1) | BE - 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 3.0 V | |||
| A28-30 (STA) - A28-10 (E1) | G - W-B | Starter assembly signal | Cranking | 6.0 V or higher |
| A28-32 (RFC) - A28-10 (E1) | LG - W-B | Cooling fan control signal | Engine switch on (IG), A/C switch on (max cool) | Pulse generation (See waveform 4) |
| A28-34 (IREL) - A28-10 (E1) | P - W-B | D INJ relay operation signal | Engine switch on (IG) | Below 1.5 V |
| A28-35 (+B2) - A28-10 (E1) | L - W-B | Power source of ECM | Engine switch on (IG) | 11 to 14 V |
| A28-36 (E2) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A28-39 (KSW) - A28-10 (E1) | R - W-B | Electrical key in vehicle signal | Electrical key outside vehicle | 11 to 14 V |
| A28-42 (SPD) - A28-10 (E1) | L - W-B | Vehicle speed signal from combination meter assembly | Driving at 20 km/h (12 mph) | Pulse generation (See waveform 5) |
| A28-45 (EC) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A28-48 (VCPP) - A28-49 (EPPM) | V - LG | Power source for canister pressure sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| A28-50 (PPMP) - A28-49 (EPPM) | BE - LG | Canister pressure sensor (built into canister pump module) | Engine switch on (IG) | 3.0 to 3.6 V |
| A28-53 (+BD1) - A28-10 (E1) | W - W-B | Power source of ECU (injector driver) | Engine switch on (IG) | 11 to 14 V |
| A28-54 (E1D1) - Body ground | W-B - - | Ground | Always | Below 1 Ω |
| A28-55 (VPA) - A28-56 (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 | |||
| A28-57 (VCPA) - A28-56 (EPA) | BE - L | Power source of accelerator pedal position sensor (for VPA) | Engine switch on (IG) | 4.5 to 5.5 V |
| A28-58 (VPA2) - A28-59 (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 | |||
| A28-60 (VCP2) - A28-59 (EPA2) | SB - P | Power source of accelerator pedal position sensor (for VPA2) | Engine switch on (IG) | 4.5 to 5.5 V |
| C78-23 (D) - A28-10 (E1) | R - W-B | D shift position switch signal | Engine switch on (IG), shift lever in D or S | 11 to 14 V |
| Engine switch on (IG), shift lever not in D or S | Below 1 V | |||
| C78-24 (N) - A28-10 (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 | |||
| C78-25 (R) - A28-10 (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 | |||
| C78-26 (P) - A28-10 (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 | |||
| C77-1 (M-) - A28-10 (E1) | L - W-B | Throttle actuator operation signal (negative signal) | Idling with warm engine | Pulse generation (See waveform 6) |
| C77-2 (M+) - A28-10 (E1) | B - W-B | Throttle actuator operation signal (positive terminal) | Idling with warm engine | Pulse generation (See waveform 7) |
| C77-3 (EGA+) - A28-10 (E1) | R - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C77-4 (EGA-) - A28-10 (E1) | L - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C77-6 (EGB+) - A28-10 (E1) | GR - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C77-5 (EGB-) - A28-10 (E1) | V - W-B | EGR valve assembly operation signal | Idling with warm engine | Pulse generation (See waveform 8) |
| C77-7 (HTHM) - A28-10 (E1) | G - W-B | Thermostat heater (water inlet with thermostat sub-assembly) operation signal | Engine switch on (IG) | 11 to 14 V |
| C77-8 (HA1B) - A28-10 (E1) | R - W-B | Air fuel ratio sensor (sensor 2) heater operation signal | Engine switch on (IG) | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 9) | |||
| C77-9 (HA1A) - A28-10 (E1) | L - W-B | Air fuel ratio sensor (sensor 1) heater operation signal | Engine switch on (IG) | 11 to 14 V |
| Idling with cold engine | Pulse generation (See waveform 10) | |||
| C77-11 (#2D+) - A28-10 (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) |
| C77-10 (#2D-) - A28-10 (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) |
| C77-12 (#3D+) - A28-10 (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) |
| C77-13 (#3D-) - A28-10 (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) |
| C77-15 (#4D+) - A28-10 (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) |
| C77-14 (#4D-) - A28-10 (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) |
| C77-16 (#1D+) - A28-10 (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) |
| C77-17 (#1D-) - A28-10 (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) |
| C77-19 (FP1+) - A28-10 (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) |
| C77-18 (FP1-) - A28-10 (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) |
| C77-21 (VOP+) - A28-10 (E1) | G - W-B | Oil pressure control valve operation signal | Idling with warm engine | Pulse generation (See waveform 13) |
| C77-20 (VOP-) - A28-10 (E1) | P - W-B | Oil pressure control valve operation signal | Idling with warm engine | Pulse generation (See waveform 13) |
| C77-26 (OE1+) - C77-25 (OE1-) | P - L | Cam timing oil control solenoid assembly operation signal | Idling | Pulse generation (See waveform 14) |
| C77-28 (EDT1) - A28-10 (E1) | P - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 15) |
| C77-41 (WSV2) - A28-10 (E1) | LG - W-B | Flow shutting valve (for ATF control) operation signal | Engine switch on (IG) | 11 to 14 V |
| C77-42 (WSV1) - A28-10 (E1) | W - W-B | Flow shutting valve (for heater control) operation signal | Engine switch on (IG) | 11 to 14 V |
| C77-44 (ACM) - A28-10 (E1) | G - W-B | Vacuum switching valve (for active control engine mount system) operation signal | Engine switch on (IG) | 11 to 14 V |
| C77-46 (IGT4) - A28-10 (E1) | B - W-B | No. 4 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 16) |
| C77-47 (IGT3) - A28-10 (E1) | P - W-B | No. 3 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 16) |
| C77-48 (IGT2) - A28-10 (E1) | V - W-B | No. 2 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 16) |
| C77-49 (IGT1) - A28-10 (E1) | W - W-B | No. 1 ignition coil assembly signal (ignition signal) | Idling with warm engine | Pulse generation (See waveform 16) |
| C77-50 (WPO) - A28-10 (E1) | LG - W-B | Electric water pump assembly signal | Idling with warm engine | Pulse generation (See waveform 17) |
| C77-51 (WPI) - A28-10 (E1) | B - W-B | Electric water pump assembly signal | Idling with warm engine | Pulse generation (See waveform 18) |
| C77-66 (PRG) - A28-10 (E1) | P - W-B | Purge VSV operation signal | Engine switch on (IG) | 11 to 14 V |
| Idling with warm engine, under purge control | Pulse generation (See waveform 19) | |||
| C77-70 (EMR1) - A28-10 (E1) | LG - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 20) |
| C77-71 (EMF1) - A28-10 (E1) | B - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Below 5.0 V |
| C77-72 (EMD1) - A28-10 (E1) | L - W-B | Cam timing control motor with EDU assembly signal | Idling with warm engine | Pulse generation (See waveform 21) |
| C77-73 (#40) - A28-10 (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) |
| C77-74 (#30) - A28-10 (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) |
| C77-75 (#20) - A28-10 (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) |
| C77-76 (#10) - A28-10 (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) |
| C77-78 (VCVG) - A28-10 (E1) | R - W-B | Power source of mass air flow meter sub-assembly (specific voltage) | Engine switch on (IG) | 4.8 to 5.2 V |
| C77-84 (VCPF) - A28-10 (E1) | LG - W-B | Power source of No. 2 fuel pressure sensor (for low pressure side) (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-87 (VTA2) - C77-110 (ETA) | V - G | 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 | |||
| C77-88 (VCV1) - A28-10 (E1) | L - W-B | Power source of camshaft position sensor (for intake camshaft) (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-90 (VV1+) - C77-89 (VV1-) | B - LG | Camshaft position sensor (for intake camshaft) signal | Idling with warm engine | Pulse generation (See waveform 23) |
| C77-91 (EV1+) - C77-114 (EV1-) | V - G | Camshaft position sensor (for exhaust camshaft) signal | Idling with warm engine | Pulse generation (See waveform 23) |
| C77-93 (NE+) - C77-115 (NE-) | L - P | Crankshaft position sensor signal | Idling with warm engine | Pulse generation (See waveform 24) |
| C77-94 (A1A-) - A28-10 (E1) | G - W-B | Air fuel ratio sensor (sensor 1) signal | Engine switch on (IG) | 1.24 to 4.22 V |
| C77-95 (A1A+) - A28-10 (E1) | R - W-B | Air fuel ratio sensor (sensor 1) signal | Engine switch on (IG) | 1.46 to 4.22 V |
| C77-97 (PR) - C77-96 (EPR) | L - V | Fuel pressure sensor (for high pressure side) signal | Idling with warm engine | 0.5 to 4.5 V |
| C77-98 (VCPR) - C77-96 (EPR) | LG - V | Power source of fuel pressure sensor (for high pressure side) (specific voltage) | Engine switch on (IG) | 4.75 to 5.25 V |
| C77-99 (VCPE) - C77-100 (EPEO) | R - L | Power source of oil pressure and temperature sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-101 (VG) - C77-79 (E2G) | W - G | Mass air flow meter sub-assembly signal | Engine switch on (IG) | Pulse generation (See waveform 25) |
| C77-102 (THA) - C77-79 (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 |
| C77-107 (PFL) - C77-61 (EPFL) | V - L | No. 2 fuel pressure sensor (for low pressure side) signal | Idling with warm engine | 0.75 to 4.5 V |
| C77-108 (VTA1) - C77-110 (ETA) | P - G | 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 | |||
| C77-109 (VCTA) - C77-110 (ETA) | R - G | Power source of throttle position sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-111 (KNK1) - C77-112 (EKNK) | B - W | Knock control sensor signal | Engine speed maintained at 4000 rpm after warming up engine | Pulse generation (See waveform 26) |
| C77-113 (VCE1) - A28-10 (E1) | L - W-B | Power source of camshaft position sensor (for exhaust camshaft) (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-116 (VCNE) - A28-10 (E1) | V - W-B | Power source of crankshaft position sensor (specific voltage) | Engine switch on (IG) | 4.5 to 5.5 V |
| C77-117 (A1B-) - A28-10 (E1) | W - W-B | Air fuel ratio sensor (sensor 2) signal | Engine switch on (IG) | 1.17 to 4.49 V |
| C77-118 (A1B+) - A28-10 (E1) | B - W-B | Air fuel ratio sensor (sensor 2) signal | Engine switch on (IG) | 1.53 to 5.96 V |
| C77-120 (PIM) - C77-119 (EPIM) | P - G | Manifold absolute pressure sensor signal | Engine switch on (IG) | 3.0 to 4.5 V |
| C77-121 (VCPM) - C77-119 (EPIM) | B - G | Power source of manifold absolute pressure sensor (specific voltage) | Engine switch on (IG) | 4.75 to 5.25 V |
| C77-122 (PEO) - C77-100 (EPEO) | W - L | Oil pressure sensor signal | Idling with warm engine | 0.5 to 4.5 V |
| C77-123 (THEO) - C77-100 (EPEO) | V - L | Engine oil temperature sensor signal | Engine switch on (IG) | 0.14 to 4.93 V |
| C77-125 (THW) - C77-124 (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 |
WAVEFORM 1
.png)
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
Engine Speed Signal | ECM Terminal Name | Between NEO and E1 |
| Tester Range | 2 V/DIV., 2 ms./DIV. |
| Condition | Idling with warm engine |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 3
.png)
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 4
.png)
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.
WAVEFORM 5
.png)
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 6
.png)
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 7
.png)
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 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 |
HINT:
When the EGR valve assembly is operating, a waveform is produced at each terminal.
WAVEFORM 9
.png)
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
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
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
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
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
.png)
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
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
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 |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 17
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 |
HINT:
The duty ratio varies depending on the engine water pump assembly speed.
WAVEFORM 18
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 |
HINT:
The wavelength becomes shorter as the engine water pump assembly speed increases.
WAVEFORM 19
.png)
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 20
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 |
HINT:
The wavelength becomes shorter as the engine speed increases.
WAVEFORM 21
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
.png)
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") |
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 23
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 24
.png)
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 25
.png)
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 26
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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 |
HINT:
- The wavelength becomes shorter as the engine speed increases.
- The waveforms and amplitudes displayed differ slightly depending on the vehicle.
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Dtc Check / Clear
DTC CHECK / CLEAR NOTICE: When the diagnosis system is changed from normal mode to check mode or vice versa, all DTCs and Freeze Frame Data recorded in normal mode are cleared. Before changing modes,
Check Mode Procedure
CHECK MODE PROCEDURE HINT: Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode. NOTICE: All of t
Active Control Engine Mount System
DESCRIPTION LOCATION *1 Vacuum Switching Valve (for Active Control Engine Mount System) *2 Front Engine Mounting Insulator The active control engine mount system decreases engine vibratio
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Right Rear Wheel ABS Hold Solenoid Control Circuit Short to Battery (C12E712,...,C12F249)
DESCRIPTION The ABS solenoid relay and solenoid valves are built into the brake actuator assembly. The rear solenoid valve RH controls the brake fluid pressure of the rear wheel cylinder RH of the vehicle. When this DTC is stored, the fail-safe function operates and the ABS solenoid relay is turned
Check Bus 2 Line for Short to GND
DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 18 (CA4H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 17 (CA4L) of the central gateway ECU (network gateway ECU) and termin
