Terminals Of ECM
WARNING: This page is about a different car, the 2008 Toyota FJ Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
HINT:
The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate conditions for checking each pair of terminals are also indicated.
The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the STD Voltages column.
The illustration above can be used as a reference to identify the ECM terminal locations.
VOLTAGE SPECIFICATION CHART
| Symbols (Terminal No.) | Wiring Colors | Terminal Descriptions | Conditions | STD Voltages | ||
|---|---|---|---|---|---|---|
| BATT (E47-3) - E1 (B3-1) | L-BR | Battery (for measuring the battery voltage and for the ECM memory) | Always | 11 to 14 V | ||
| +BM (E47-7) - E1 (B3-1) | GR-BR | Power source of throttle motor | Always | 11 to 14 V | ||
| IGSW (E47-9) - E1 (B3-1) | B-O - BR | Ignition switch | Ignition switch ON | 11 to 14 V | ||
| +B(E47-1)-E1 (B3-1) | B-BR | Power source of ECM | Ignition switch ON | 11 to 14 V | ||
| +B2 (E47-2) - E1 (B3-1) | B-BR | Power source of ECM | Ignition switch ON | 11 to 14 V | ||
| OC1+(B3-17)-OC1-(B3-16) | G-Y - L-B | Camshaft timing oil control valve (OCV) | Ignition switch ON | Pulse generation (see 1waveform 1) | ||
| OC2+ (B3-15) - OC2- (B3-14) | L-W - L-R | Camshaft timing oil control valve (OCV) | Ignition switch ON | Pulse generation (see 1waveform 1) | ||
| MREL (E47-8) - E1 (B3-1) | W-G - BR | EFI relay | Ignition switch ON | 11 to 14 V | ||
| VC(B1-23)-E2(B1-28) | L-R - W-G | Power source of sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V | ||
| VG(B1-30)-E2G(B1-29) | R-R-W | Mass air flow meter | Idling, Transmission gear neutral, A/C switch OFF | 0.5 to 3.0 V | ||
| THA(B1-22)-E2(B1-28) | R-B - W-G | Intake air temperature sensor | Idling, Intake air temperature 20°C (68°F) | 0.5 to 3.4 V | ||
| THW(B1-21)-E2(B1-28) | B-W-G | Engine coolant temperature sensor | Idling, Engine coolant temperature 80°C (176°F) | 0.2 to 1.0 V | ||
| TVTA1 (B1-20)-E2(B1-28) | G-B - W-G | Throttle position sensor (for engine control) | Ignition switch ON, Throttle valve fully closed | 0.5 to 1.2 V | ||
| Ignition switch ON, Throttle valve fully open | 3.2 to 4.8 V | |||||
| VTA2(B1-19)-E2(B1-28) | G-W - W-G | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, Throttle valve fully closed | 2.1 to 3.1 V | ||
| Ignition switch ON, Throttle valve fully open | 4.5 to 5.0 V | |||||
| VPA (E47-18) - EPA (E47-20) | W-R - LG-B | Accelerator pedal position sensor (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 | |||||
| VPA2 (E47-19) - EPA2 (E47-21) | R-B - V-W | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, Accelerator pedal fully released | 1.2 to 2.0 V | ||
| Ignition switch ON, Accelerator pedal fully depressed | 3.4 to 5.0 V | |||||
| VCPA (E47-26) - EPA (E47-20) | B-Y - LG-B | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V | ||
| VCP2 (E47-27) - EPA2 (E47-21) | W-L - V-W | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V | ||
| HA1A (B2-2) - E04 (B2-7) HA2A(B2-1)-E05(B2-6) | R-L - W-B B-W - W-B |
A/F sensor heater | Idling with warm engine | Pulse generation (see 2waveform 2) | ||
| Ignition switch ON | 11 to 14 V | |||||
| A1A+(B2-22)-E1 (B3-1) | P-BR | A/F sensor | Ignition switch ON | 3.3 V(1) | ||
| A2A+(B2-23) - E1 (B3-1) | Y-BR | A/F sensor | Ignition switch ON | 3.3 V(1) | ||
| A1A-(B2-30) - E1 (B3-1) | L-BR | A/F sensor | Ignition switch ON | 2.9 V(1) | ||
| A2A-(B2-31)-E1 (B3-1) | BR-BR | A/F sensor | Ignition switch ON | 2.9 V(1) | ||
| HT1B(B1-1)-E1 (B3-1) HT2B (B2-5) - E1 (B3-1) |
G-BR L-BR |
Heated oxygen sensor heater | Idling | Below 3.0 V | ||
| Ignition switch ON | 11 to 14 V | |||||
| OX1B(B1-18)-E2(B1-28) OX2B(B2-33)-E2(B1-28) |
W-W-G B-W-G |
Heated oxygen sensor | Maintain engine speed at 2,500 rpm for 2 minutes after warming up | Pulse generation (see 3waveform 3) | ||
| #10(B3-2)-E01 (B1-7) | R-L - BR | Fuel injector assembly | Ignition switch ON | 11 to 14 V | ||
| #20 (B3-3) - E01 (B1-7) | G-BR | Idling | Pulse generation (see 4waveform 4) | |||
| #30 (B3-4) - E01 (B1-7) | R-BR | |||||
| #40 (B3-5) - E01 (B1-7) | W-BR | |||||
| #50 (B3-6) - E01 (B1-7) | Y-BR | |||||
| #60 (B3-7) - E01 (B1-7) | L-BR | |||||
| KNK1 (B2-29) - EKNK (B2-28) | B-W | Knock sensor | Maintain engine speed at 4,000 rpm after warming up | Pulse generation (see 5waveform 5) | ||
| KNK2 (B2-21) - EKN2 (B2-20) | G-R | Knock sensor | Maintain engine speed at 4,000 rpm after warming up | Pulse generation (see 5waveform 5) | ||
| W1+ (B3-19) - VV1- (B3-29) | R-G | Variable Valve Timing (VVT) sensor | Idling | Pulse generation (see 6waveform 6) | ||
| W2+ (B3-18) - VV2- (B3-28) | Y-L | Variable Valve Timing (VVT) sensor | Idling | Pulse generation (see 6waveform 6) | ||
| NE+(B3-21)-NE-(B3-20) | B-W | Crankshaft position sensor | Idling | Pulse generation (see 6waveform 6) | ||
| IGT1 (B1-8)-E1 (B3-1) | Y-R - BR | Ignition coil assembly (ignition signal) | Idling | Pulse generation (see 7waveform 7) | ||
| IGT2(B1-9)-E1 (B3-1) | G-BR | |||||
| IGT3(B1-10)-E1 (B3-1) | B-W - BR | |||||
| IGT4(B1-11)-E1 (B3-1) | Y-G - BR | |||||
| IGT5(B1-12)-E1 (B3-1) | GR-BR | |||||
| IGT6(B1-13)-E1 (B3-1) | L-BR | |||||
| IGF1 (B1-24)-E1 (B3-1) | W-R - BR | Ignition coil assembly (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.5 V | ||
| Idling | Pulse generation (see 7waveform 7) | |||||
| PRG(B1-34)-E01 (B1-7) | G-Y - BR | Purge VSV | Ignition switch ON | 11 to 14 V | ||
| Idling | Pulse generation (see 8waveform 8) | |||||
| SPD (E46-8) - E1 (B3-1) | V-R - BR | Speed signal from combination meter | Ignition switch ON, Rotate driving wheel slowly | Pulse generation (see 9waveform 9) | ||
| STA(B3-11)-E1 (B3-1) | B-Y - BR | Starter signal | Cranking | 11 to 14 V | ||
| STP(E47-15)-E1 (B3-1) | G-Y - BR | Stop light switch | Brake pedal depressed | 7.5 to 14 V | ||
| Brake pedal released | Below 1.5 V | |||||
| ST1-(E47-16)-E1 (B3-1) | R-L - BR | Stop light switch (opposite to STP terminal) | Ignition switch ON, Brake pedal depressed | Below 1.5 V | ||
| Ignition switch ON, Brake pedal released | 7.5 to 14 V | |||||
| NSW(B2-8)-E1 (B3-1) | L-Y - BR | Park/Neutral position switch | Ignition switch ON, Shift lever position in P or N | Below 3.0 V | ||
| Ignition switch ON, Shift lever position other than P and N | 11 to 14 V | |||||
| M+(B1-5)-ME01 (B2-3) | P-W-B | Throttle motor | Idling with warm engine | Pulse generation (see 10waveform 10) | ||
| M-(B1-4)-ME01 (B2-3) | L-W-B | Throttle motor | Idling with warm engine | Pulse generation (see 11waveform 11) | ||
| FC(E47-10)-E1 (B3-1) | GR-B - BR | Fuel pump control | Ignition switch ON | 11 to 14 V | ||
| FPR (B3-30) - E1 (B3-1) | Y-B - BR | Fuel pump control | Ignition switch ON | 11 to 14 V | ||
| W (E46-30) - E1 (B3-1) | R-B - BR | MIL | Ignition switch ON | Below 3.0 V | ||
| Idling | 11 to 14 V | |||||
| ELS(E46-13)-E1 (B3-1) | Y-B - BR | Electric load | Defogger or taillight switch OFF | 0 to 1.5 V | ||
| Defogger or taillight switch ON | 7.5 to 14 V | |||||
| ELS2(E46-12)-E1 (B3-1) | Y-G - BR | Electric load | Voltage inverter OFF | 0 to 1.5 V | ||
| Voltage inverter ON | 7.5 to 14 V | |||||
| TC (E47-23) - E1 (B3-1) | P-L - BR | Terminal TC of DLC 3 | Ignition switch ON | 11 to 14 V | ||
| TACH(E46-1)-E1 (B3-1) | B-W - BR | Engine speed | Idling | Pulse generation (see 12waveform 12) | ||
| ACIS(B1-33)-E1 (B3-1) | W-L - BR | VSV for ACIS | Ignition switch ON | 11 to 14 V | ||
| PSW(B3-10)-E1 (B3-1) | G-W - BR | PIS pressure switch | Ignition switch ON | 11 to 14 V | ||
| VPMP (E47-5) - E1 (B3-1) | R-G - BR | Vent valve (built into canister pump module) | Ignition switch ON | 11 to 14 V | ||
| MPMP (E47-6) - E1 (B3-1) | O-BR | Leak detection pump (built into canister pump module) | Leak detection pump OFF | 0 to 3V | ||
| Leak detection pump ON | 11 to 14 V | |||||
| PPMP (E47-22) - E2 (B1-28) | R-W-G | Canister pressure sensor (built into canister pump module) | Ignition switch ON | 3 to 3.6 V | ||
| F/PS (E46-32) - E1 (B3-1) | L-BR | Airbag sensor assembly | Idling with warm engine | Pulse generation (see 13waveform 13) | ||
| CANH (E46-33) - E1 (B3-1) | W-BR | CAN communication line | Ignition switch ON | Pulse generation (see 14waveform 14) | ||
| CANL (E46-34) - E1 (B3-1) | R-BR | CAN communication line | Ignition switch ON | Pulse generation (see 15waveform 15) | ||
|
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- WAVEFORM 1
Camshaft timing oil control valve (OCV)
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between OC1+ and OC1- or OC2+ and OC2- Tester Ranges 5 V/DIV, 1 msec/DIV Conditions Idling Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The wavelength becomes shorter as the engine rpm increases.
- WAVEFORM 2
Air fuel ratio sensor heater
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names CH1: Between HA1A and E04
CH2: Between HA2A and E05Tester Ranges 5 V/DIV, 10 msec/DIV Conditions Idling with warm engine HINT:
The wavelength varies in accordance with the engine operating condition.
- WAVEFORM 3
Heated oxygen sensor
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between 0X1B and E2 or OX2B and E2 Tester Ranges 0.2 V/DIV, 200 msec./DIV Conditions Engine speed maintained at 2,500 rpm for 2 minutes after warming up sensor HINT:
In the DATA LIST, item O2S B1S2 or O2S B2S2 shows the ECM input values from the heated oxygen sensor.
- WAVEFORM 4
Fuel injector
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between #10 (to 60) and E01 Tester Ranges 20 V/DIV, 20 msec/DIV Conditions Idling HINT:
The wavelength becomes shorter as the engine rpm increases.
- WAVEFORM 5
Knock sensor
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between KNK1 and EKNK or KNK2 and EKN2 Tester Ranges 500 mV/DIV, 0.01 to 1 msec./DIV Conditions Engine speed maintained at 4,000 rpm after warming up engine HINT:
- The wavelength becomes shorter as the engine rpm increases.
- The waveforms and amplitudes displayed on the tester differ slightly depending on the vehicle.
- WAVEFORM 6
- VVT sensor
- Crankshaft position sensorWAVEFORM SIGNAL REFERENCE CHART
ECM Terminal Names - Between NE+ and NE-
- Between VV1+ and VV1- or VV2+ and VV2-
Tester Ranges 2 V/DIV, 20 msec/DIV Conditions Idling Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The wavelength becomes shorter as the engine rpm increases.
- WAVEFORM 7
- Igniter IGT signal (from ECM to igniter)
- Igniter IGF signal (from igniter to ECM)WAVEFORM SIGNAL REFERENCE CHART
ECM Terminal Names - Between IGT (1 to 6) and E1
- Between IGF1 and E1
Tester Ranges 2 2 V/DIV, 20 msec/DIV Conditions Idling Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The wavelength becomes shorter as the engine rpm increases.
- WAVEFORM 8
Purge VSV
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between PRG and E01 Tester Ranges 10 V/DIV, 50 msec/DIV Conditions Idling HINT:
If the waveform is not similar to the illustration, check the waveform again after idling for 10 minutes or more.
- WAVEFORM 9
Vehicle speed signal
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between SPD and E1 Tester Ranges 2 V/DIV, 20 msec/DIV Conditions Driving at 12 mph (20 km/h) HINT:
The wavelength becomes shorter as the vehicle speed increases.
- WAVEFORM 10
Throttle actuator positive terminal
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between M+ and ME01 Tester Ranges 5 V/DIV, 1 msec/DIV Conditions Idling with warm engine Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The duty ratio varies depending on the throttle actuator operation.
- WAVEFORM 11
Throttle actuator negative terminal
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between M- and ME01 Tester Ranges 5 V/DIV, 1 msec/DIV Conditions Idling with warm engine Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The duty ratio varies depending on the throttle actuator operation.
- WAVEFORM 12
Engine speed signal
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between TACH and E1 Tester Ranges 5V/DIV, "Lo msec./DIV Conditions Idling HINT:
The wavelength becomes shorter as the engine rpm increases.
- WAVEFORM 13
Airbag sensor assembly
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between F/PS and E1 Tester Ranges 5 V/DIV, 500 msec./DIV Conditions Idling with warm engine - WAVEFORM 14
CAN communication signal (Reference)
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between CANH and E1 Tester Ranges 1 V/DIV, 10μsec./DIV Conditions Ignition switch ON Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The wavelength varies depending on the CAN communication signal.
- WAVEFORM 15
CAN communication signal (Reference)
WAVEFORM SIGNAL REFERENCE CHARTECM Terminal Names Between CANL and E1 Tester Ranges 1 V/DIV, 10μsec./DIV Conditions Ignition switch ON Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
HINT:
The wavelength varies depending on the CAN communication signal.