Terminals Of ECM
Each ECM terminal's standard voltage is shown in the table below.
In the table, first follow the information under "Condition". Next look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "Specific Condition". Use the illustration above as a reference for the ECM terminals.
ECM CONNECTOR TERMINALS VOLTAGE CONDITIONS
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specific Condition |
|---|---|---|---|---|
| BATT (E5-3) - E1 (E7-1) | BR - BR | Battery (for measuring battery voltage and for ECM memory) | Always | 9 to 14 V |
| +BM (E6-6) - E1 (E7-1) | W - BR | Power source of throttle motor | Always | 9 to 14 V |
| IGSW (E5-9) - E1 (E7-1) | P - BR | Ignition switch | Ignition switch ON | 9 to 14 V |
| +B (E5-1) - E1 (E7-1) | W - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| +B2 (E5-2) - E1 (E7-1) | W - BR | Power source of ECM | Ignition switch ON | 9 to 14 V |
| OC1+ (E9-16) - OC1- (E9-15) | G-W - G-R | Camshaft timing (OCV) | Ignition switch ON | Pulse generation (See DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT, DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT, DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT ) |
| OC2+ (E9-14) - OC2- (E9-13) | L-R - G-B | Camshaft timing (OCV) | Ignition switch ON | Pulse generation (See DTC P0100 MASS OR VOLUME AIR FLOW CIRCUIT, DTC P0102 MASS OR VOLUME AIR FLOW CIRCUIT LOW INPUT, DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT ) |
| MREL (E5-8) - E1 (E7-1) | B - BR | EFI relay | Ignition switch ON | 9 to 14 V |
| VC (E7-18) - E2 (E7-28) | Y - BR | Power source of sensor (specific voltage) | Ignition switch ON | 4.5 to 5.5 V |
| VG (E7-30) - E2G (E7-29) | R - L-W | Mass air flow meter | Idling, shift lever position P or N, A/C switch OFF | 0.5 to 3.0 V |
| THA (E7-20) - E2 (E7-28) | L-B - BR | Intake air temperature sensor | Idling, intake air temp. 20°C (68°F) | 0.5 to 3.4 V |
| THW (E7-19) - E2 (E7-28) | G-B - BR | Engine coolant temperature sensor | Idling, engine coolant temp. 80°C (176°F) | 0.2 to 1.0 V |
| VTA1 (E7-21) - E2 (E7-28) | R-W - BR | Throttle position sensor (for engine control) | Ignition switch ON, throttle valve fully closed | 0.5 to 1.2 V |
| VTA1 (E7-21) - E2 (E7-28) | R-W - BR | Throttle position sensor (for engine control) | Ignition switch ON, throttle valve fully open | 3.2 to 4.8 V |
| VTA2 (E7-31) - E2 (E7-28) | B-R - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, accelerator pedal released | 2.1 to 3.1 V |
| VTA2 (E7-31) - E2 (E7-28) | B-R - BR | Throttle position sensor (for sensor malfunction detection) | Ignition switch ON, accelerator pedal depressed | 4.5 to 5.5 V |
| VPA (E5-22) - EPA (E5-28) | B - R | Accelerator pedal position sensor (for engine control) | Ignition switch ON, accelerator pedal released | 0.5 to 1.1 V |
| VPA (E5-22) - EPA (E5-28) | B - R | Accelerator pedal position sensor (for engine control) | Ignition switch ON, accelerator pedal depressed | 2.6 to 4.5 V |
ECM CONNECTOR TERMINALS VOLTAGE CONDITIONS
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specific Condition |
|---|---|---|---|---|
| VPA2 (E5-23) - EPA2 (E5-29) | W - BR | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, accelerator pedal released | 1.2 to 2.0 V |
| VPA2 (E5-23) - EPA2 (E5-29) | W - BR | Accelerator pedal position sensor (for sensor malfunction detection) | Ignition switch ON, accelerator pedal depressed | 3.4 to 5.3 V |
| VCPA (E5-26) - EPA (E5-28) | G - R | Power source of accelerator pedal position sensor (for VPA) | Ignition switch ON | 4.5 to 5.5 V |
| VCP2 (E5-27) - EPA2 (E5-29) | L - BR | Power source of accelerator pedal position sensor (for VPA2) | Ignition switch ON | 4.5 to 5.5 V |
| HA1H (E8-5) - E04 (E8-7) HA2A (E8-4) - E05 (E8-6) | B-W - W-B R-W - W-B | A/F sensor heater | Idling | Below 3.0 V |
| HA1H (E8-5) - E04 (E8-7) HA2A (E8-4) - E05 (E8-6) | B-W - W-B R-W - W-B | A/F sensor heater | Ignition switch ON | 9 to 14 V |
| A1A+ (E8-22) - E1 (E7-1) | BR - BR | A/F sensor | Ignition switch ON | 3.0 to 3.6 V |
| A2A+ (E8-23) - E1 (E7-1) | P - BR | A/F sensor | Ignition switch ON | 3.0 to 3.6 V |
| A1A- (E8-30) - E1 (E7-1) | Y - BR | A/F sensor | Ignition switch ON | 2.7 to 3.3 V |
| A2A- (E8-31) - E1 (E7-1) | L - BR | A/F sensor | Ignition switch ON | 2.7 to 3.3 V |
| HT1B (E8-25) - E2 (E7-28) HT2B (E8-33) - E2 (E7-28) | R-Y - BR W-L - BR | Heated oxygen sensor heater | Idling | Below 3.0 V |
| HT1B (E8-25) - E2 (E7-28) HT2B (E8-33) - E2 (E7-28) | R-Y - BR W-L - BR | Heated oxygen sensor heater | Ignition switch ON | 9 to 14 V |
| OX1B (E8-21) - E2 (E7-28) OX2B (E8-29) - E2 (E7-28) | W - BR B - BR | Heated oxygen sensor | Maintain engine speed at 2,500 RPM for 2 minutes after warning up | Pulse generation |
| #10 (E7-1) - E01 (E7-7) #20 (E7-2) - E01 (E7-7) #30 (E7-3) - E01 (E7-7) #40 (E7-4) - E01 (E7-7) #50 (E7-5) - E01 (E7-7) #60 (E8-3) - E01 (E7-7) | L - W-B Y - W-B B - W-B W - W-B B-W - W-B G - W-B | Injector | Ignition switch ON | 9 to 14 V |
| #10 (E7-1) - E01 (E7-7) #20 (E7-2) - E01 (E7-7) #30 (E7-3) - E01 (E7-7) #40 (E7-4) - E01 (E7-7) #50 (E7-5) - E01 (E7-7) #60 (E8-3) - E01 (E7-7) | L - W-B Y - W-B B - W-B W - W-B B-W - W-B G - W-B | Injector | Idling | Pulse generation (See DTC P0300 RANDOM/MULTIPLE CYLINDER MISFIRE DETECTED, DTC P0301 CYLINDER 1 MISFIRE DETECTED, DTC P0302 CYLINDER 2 MISFIRE DETECTED, DTC P0303 CYLINDER 3 MISFIRE DETECTED, DTC P0304 CYLINDER 4 MISFIRE DETECTED, DTC P0305 CYLINDER 5 MISFIRE DETECTED, DTC P0306 CYLINDER 6 MISFIRE DETECTED ) |
| KNK1 (E8-1) - EKNK (E8-28) | B - W | Knock sensor | Maintain engine speed at 4,000 RPM after warming up | Pulse generation (See DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR), DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR), DTC P0332 KNOCK SENSOR 2 CIRCUIT LOW INPUT (BANK 2), DTC P0333 KNOCK SENSOR 2 CIRCUIT HIGH INPUT (BANK 2) ) |
| KNK2 (E8-2) - EKN2 (E8-20) | R - G | Knock sensor | Maintain engine speed at 4,000 RPM after warming up | Pulse generation (See DTC P0327 KNOCK SENSOR 1 CIRCUIT LOW INPUT (BANK 1 OR SINGLE SENSOR), DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR), DTC P0332 KNOCK SENSOR 2 CIRCUIT LOW INPUT (BANK 2), DTC P0333 KNOCK SENSOR 2 CIRCUIT HIGH INPUT (BANK 2) ) |
| VV1+ (E9-27) - NE- (E9-24) | B-W - G | VVT sensor | Idling | Pulse generation (See DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT, DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT ) |
| VV2+ (E9-26) - NE- (E9-24) | L - G | VVT sensor | Idling | Pulse generation (See DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT, DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT ) |
| NE+ (E9-25) - NE- (E9-24) | R - G | Crankshaft position sensor | Idling | Pulse generation (See DTC P0335 CRANKSHAFT POSITION SENSOR "A" CIRCUIT, DTC P0339 CRANKSHAFT POSITION SENSOR "A" CIRCUIT INTERMITTENT ) |
| IGT1 (E7-8) - E1 (E7-1) IGT2 (E7-9) - E1 (E7-1) IGT3 (E7-10) - E1 (E7-1) IGT4 (E7-11) - E1 (E7-1) IGT5 (E7-12) - E1 (E7-1) IGT6 (E7-13) - E1 (E7-1) | R-L - BR P - BR Y-B - BR L-Y - BR G-Y - BR L-R - BR | Ignition coil with igniter (ignition signal) | Idling | Pulse generation (See DTC P0351 IGNITION COIL "A" PRIMARY/SECONDARY CIRCUIT, DTC P0352 IGNITION COIL "B" PRIMARY/SECONDARY CIRCUIT, DTC P0353 IGNITION COIL "C" PRIMARY/SECONDARY CIRCUIT, DTC P0354 IGNITION COIL "D" PRIMARY/SECONDARY CIRCUIT, DTC P0355 IGNITION COIL "E" PRIMARY/SECONDARY CIRCUIT, DTC P0356 IGNITION COIL "F" PRIMARY/SECONDARY CIRCUIT ) |
ECM CONNECTOR TERMINALS VOLTAGE CONDITIONS
| Symbols (Terminal No.) | Wiring Color | Terminal Description | Condition | Specific Condition |
|---|---|---|---|---|
| IGF1 (E7-24) - E1 (E7-1) | W-R - BR | Ignition coil with igniter (ignition confirmation signal) | Ignition switch ON | 4.5 to 5.5 V |
| IGF1 (E7-24) - E1 (E7-1) | W-R - BR | Ignition coil with igniter (ignition confirmation signal) | Idling | Pulse generation (See DTC P0351 IGNITION COIL "A" PRIMARY/SECONDARY CIRCUIT, DTC P0352 IGNITION COIL "B" PRIMARY/SECONDARY CIRCUIT, DTC P0353 IGNITION COIL "C" PRIMARY/SECONDARY CIRCUIT, DTC P0354 IGNITION COIL "D" PRIMARY/SECONDARY CIRCUIT, DTC P0355 IGNITION COIL "E" PRIMARY/SECONDARY CIRCUIT, DTC P0356 IGNITION COIL "F" PRIMARY/SECONDARY CIRCUIT ) |
| PRG (E7-34) - E1 (E7-1) | G - BR | EVAP VSV | Ignition switch ON | 9 to 14 V |
| CCV (E7-27) - E1 (E7-1) | L - BR | CCV | Ignition switch ON | 9 to 14 V |
| PTNK (E5-21) - E1 (E7-1) | L - BR | Vapor pressure sensor | Ignition switch ON | 2.9 to 3.7 V |
| PTNK (E5-21) - E1 (E7-1) | L - BR | Vapor pressure sensor | Ignition switch ON, apply vacuum 4.0 kPa (30 mmHg, 1.18 in.Hg) | Below 0.5 V |
| SPD (E6-17) - E1 (E7-1) | Y - BR | Speed signal from combination meter | Ignition switch ON, rotate driving wheel slowly | Pulse generation (See DTC P0500 VEHICLE SPEED SENSOR "A", DTC P0503 VEHICLE SPEED SENSOR "A" INTERMITTENT/ERRATIC/HIGH ) |
| STA (E7-17) - E1 (E7-1) | B - BR | Starter signal | Cranking | 6 V or higher |
| STP (E6-19) - E1 (E7-1) | BR - BR | Stop lamp switch | Ignition switch ON, brake pedal is depressed | 7.5 to 14 V |
| STP (E6-19) - E1 (E7-1) | BR - BR | Stop lamp switch | Ignition switch ON, brake pedal is released | Below 1.5 V |
| ST1- (E6-12) - E1 (E7-1) | V - BR | Stop lamp switch (opposite to stop) | Ignition switch ON, brake pedal is depressed | Below 1.5 V |
| ST1- (E6-12) - E1 (E7-1) | V - BR | Stop lamp switch (opposite to stop) | Ignition switch ON, brake pedal is released | 7.5 to 14 V |
| NSW (E7-16) - E1 (E7-1) | B-R - BR | PNP switch | Ignition switch ON, shift lever position in P or N | Below 3.0 V |
| NSW (E7-16) - E1 (E7-1) | B-R - BR | PNP switch | Ignition switch ON, shift lever position in P or N | 9 to 14 V |
| M+ (E9-3) - ME01 (E9-4) M- (E9-2) - ME01 (E9-4) | B - W-B W - W-B | Throttle motor | Idling | Pulse generation |
| FC (E5-10) - E1 (E7-1) | Y - BR | Fuel pump control | Ignition switch ON | 9 to 14 V |
| FC (E5-10) - E1 (E7-1) | Y - BR | Fuel pump control | Idling | 0 to 3 V |
| W (E5-11) - E1 (E7-1) | SB - BR | MIL | Ignition switch ON | Below 3.0 V |
| W (E5-11) - E1 (E7-1) | SB - BR | MIL | Idling | 9 to 14 V |
| ELS2 (E5-12) - E1 (E7-1) | G - BR | Electric load | Power outlet OFF | 0 to 1.5 V |
| ELS2 (E5-12) - E1 (E7-1) | G - BR | Electric load | Power outlet ON | 7.5 to 14 V |
| TC (E5-20) - E1 (E7-1) | O - BR | Terminal TC of DLC 3 | Ignition switch ON | 9 to 14 V |
| SIL (E5-18) - E1 (E7-1) | R - BR | Terminal SIL of DLC3 | During transmission | Pulse generation |
| TACH (E5-5) - E1 (E7-1) | B - BR | Engine speed | Idling | Pulse generation |
| ACIS (E7-15) - E1 (E7-1) | R-Y - BR | VSV for ACIS | Ignition switch ON | 9 to 14 V |
| ACM (E9-6) - E1 (E7-1) | Y-G - BR | VSV for ACM | Ignition switch ON | 9 to 14 V |
| ENG+ (E5-24) - ENG- (E5-30) | V - R | Electric load (from skid control ECU) | Idling | Pulse generation |
| TRC+ (E5-25) - TRC- (E5-31) | Y - G | Electric load (from skid control ECU) | Idling | Pulse generation |
| PSW (E9-10) - E1 (E9-1) | R-W - BR | PS pressure switch | Ignition switch ON | 9 to 14 V |