Terminals Of ECM: Notes
WARNING: This page is about a different variant/trim than selected.
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 is also indicated.
The result of checks should be compared with the standard normal voltage for that pair of terminals, displayed in the STD Voltage column.
The illustration above can be used as a reference to identify the ECM terminal locations.
ECM TERMINALS REFERENCE
| Symbols (Terminals No.) | Wiring Color | Terminal Description | Conditions | STD Voltages |
|---|---|---|---|---|
| BATT (E6-3) - E1 (E4-7) | R-W - BR | Battery (for measuring battery voltage and for ECM memory) | Always | Between 9V and 14V |
| IGSW (E6-9) - E1 (E4-7) | B-O - BR | Ignition switch | Ignition switch ON | Between 9V and 14V |
| +B (E6-1) - E1 (E4-7) | B-BR | Power source of ECM | Ignition switch ON | Between 9V and 14V |
| MREL (E6-8) - E1 (E4-7) | B-W - BR | EFI relay | Ignition switch ON | Between 9V and 14V |
| FC (E6-10) - E1 (E4-7) | G-R - BR | Fuel pump control | Ignition switch ON | Between 9V and 14V |
| FC (E6-10) - E1 (E4-7) | G-R - BR | Fuel pump control | Idling | Below 1.5V |
| W (E6-11) - E1 (E4-7) | R-Y - BR | MIL | Idling | Between 9V and 14V |
| W (E6-11) - E1 (E4-7) | R-Y - BR | MIL | Ignition switch ON | Below 3.5V |
| STP (E5-19) - E1 (E4-7) | G-W - BR | Stop lamp switch | Ignition switch ON, Brake pedal depressed | Between 9V and 14V |
| STP (E5-19) - E1 (E4-7) | G-W - BR | Stop lamp switch | Ignition switch ON, Brake pedal released | Below 1.5V |
| F/PS (E6-14) - E1 (E4-7) | Y - BR | Airbag sensor | Ignition switch ON | Pulse generation (see WAVEFORM 1 ) |
| STA (E4-9) - E1 (E4-7) | B - BR | Starter signal | Cranking | 5.5V or more |
| PSW (E4-29) - E1 (E4-7) | L-R - BR | Power steering oil pressure sensor | Ignition switch ON | Between 9V and 14V |
| SPD (E5-17) - E1 (E4-7) | V-W - BR | Speed signal from combination meter | Driving at 12 mph (20 km/h) | Pulse generation (see WAVEFORM 2 ) |
| TACH (E6-5) - E1 (E4-7) | B - BR | Engine speed | Idling | Pulse generation (see WAVEFORM 3 ) |
| VC (E3-18) - E2 (E3-28) | Y - BR | Power source of sensor (specific voltage) | Ignition switch ON | Between 4.5V and 5.5V |
| EVP1 (E3-12) - E01 (E3-7) | L-B - W-B | VSV for EVAP | Ignition switch ON, Engine stationary | Between 9V and 14V |
| EVP1 (E3-12) - E01 (E3-7) | L-B - W-B | VSV for EVAP | Idling with warm engine | Pulse generation (see WAVEFORM 4 ) |
| CCV (E5-1) - E01 (E3-7) | L-W-B | VSV for CCV | Ignition switch ON | Between 9V and 14V |
| TBP (E6-4) - E01 (E3-7) | R-W-B | VSV for pressure switching valve | Ignition switch ON | Between 9V and 14V |
| PTNK (E6-21) - E2 (E3-28) | L - BR | Vapor pressure sensor | Ignition switch ON | Between 2.9V and 3.7V |
| PTNK (E6-21) - E2 (E3-28) | L - BR | Vapor pressure sensor | Apply vacuum 4.0 kPa (30 mmHG, 1.18 in.Hg) | Below 0.5V |
| VG (E4-24) - EVG (E4-32) | G-L-W | Mass air flow meter | Idling, A/C switch OFF | Between 1.1V and 1.5V |
| OX1A (E4-23) - E1 (E4-7) | B - BR | Heated oxygen sensor (Sensor 1) | Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see WAVEFORM 5 ) |
| HT1A (E4-4) - E03 (E4-5) | P-W-B | Heated oxygen sensor heater (Sensor 1) | Idling | Below 3.0V |
| HT1A (E4-4) - E03 (E4-5) | P-W-B | Heated oxygen sensor heater (Sensor 1) | Ignition switch ON | Between 9V and 14V |
| OX1B (E4-21) - E1 (E4-7) | W - BR | Heated oxygen sensor (Sensor 2) | Engine speed maintained 2,500 rpm for 2 minutes after warming up sensor | Pulse generation (see WAVEFORM 6 ) |
| HT1B (E5-4) - E03 (E4-5) | P-B-W-B | Heated oxygen sensor heater (Sensor 2) | Idling | Below 3.0V |
| HT1B (E5-4) - E03 (E4-5) | P-B-W-B | Heated oxygen sensor heater (Sensor 2) | Ignition switch ON | Between 9V and 14V |
| THW (E3-1 9) - E2 (E3-28) | W - BR | Engine c00lanttempera-ture sensor | Idling, Engine coolant temperature 80°C (176°F) | Between 0.2V and 1.0V |
| G2 (E3-26) - NE- (E3-34) | B-W | Camshaft position sensor | Idling | Pulse generation (see WAVEFORM 7 ) |
| NE+ (E3-27) - NE- (E3-34) | B-W | Crankshaft position sensor | Idling | Pulse generation (see WAVEFORM 7 ) |
| THA (E3-20) - E2 (E3-28) | Y-B - BR | Intake air temperature sensor | Idling, Intake air temperature 20°C (68°F) | Between 0.5V and 3.4V |
| VTA (E3-21) - E2 (E3-28) | LG - BR | Throttle position sensor | Ignition switch ON, Throttle valve fully closed | Between 0.3V and 1.0V |
| VTA (E3-21) - E2 (E3-28) | LG - BR | Throttle position sensor | Ignition switch ON, Throttle valve fully open | Between 3.2V and 4.9V |
| #10 (E3-1) - E01 (E3-7) #20 (E3-2) - E01 (E3-7) #30 (E3-3) - E01 (E3-7) #40 (E3-4) - E01 (E3-7) |
Y-W-B B-W-B W-W-B L-W-B |
Injector | Ignition switch ON | Between 9V and 14V |
| #10 (E3-1) - E01 (E3-7) #20 (E3-2) - E01 (E3-7) #30 (E3-3) - E01 (E3-7) #40 (E3-4) - E01 (E3-7) |
Y-W-B B-W-B W-W-B L-W-B |
Injector | Idling | Pulse generation (see WAVEFORM 8 ) |
| IGT1 (E3-8) - E1 (E4-7) IGT2 (E3-9) - E1 (E4-7) IGT3 (E3-10) - E1 (E4-7) IGT4 (E3-11) - E1 (E4-7) |
R-L-BR Y-G-BR GR-BR W-BR |
Ignition coil with igniter (ignition signal) | Idling | Pulse generation (see WAVEFORM 9 ) |
| IGF (E3-23) - E1 (E4-7) | L-Y - BR | Ignition coil with igniter (ignition confirmation signal) | Ignition switch ON | Between 4.5V and 5.5V |
| IGF (E3-23) - E1 (E4-7) | L-Y - BR | Ignition coil with igniter (ignition confirmation signal) | Idling | Pulse generation (see WAVEFORM 9 ) |
| RSO (E3-5) - E01 (E3-7) | B-L - W-B | Idle air control valve | Ignition switch ON | Between 9V and 14V |
| OCV+ (E3-15) - OCV- (E3-14) | Y-B-Y | Camshaft timing oil control valve | Ignition switch ON | Pulse generation (see WAVEFORM 10 ) |
| KNK1 (E4-1) - EKNK (E4-2) | B-W | Knock sensor | Engine speed maintained 4,000 rpm after warming up engine | Pulse generation (see WAVEFORM 11 ) |
| TC (E6-20) - E1 (E4-7) | P-B - BR | Terminal TC of DLC 3 | Ignition switch ON | Between 9V and 14V |
| SIL (E6-18) - E1 (E4-7) | L-R - BR | Terminal SIL of DLC3 | Connect hand-held tester or OBD II scan tool to DLC3 | Pulse generation (see WAVEFORM 12 ) |