ECD SYSTEM TERMINALS OF ECM
Tech Tips
The standard voltage between each terminal is shown in the table below. In the table, first follow the information under "Condition".
Look under "Symbols (Terminal No.)" for the terminals to be inspected. The standard voltage between the terminals is shown under "STD Voltage". Use the illustration above as a reference for the ECM terminals.
| Symbols (Terminal No.) | Terminal Description | Condition | STD Voltage (V) |
|---|---|---|---|
| BATT (B53-28) - E1 (B53-38) | Battery (for measuring battery voltage and for ECM memory) | Always | 11 to 14 |
| MREL (B54-14) - E1 (B53-38) | EFI main relay | Ignition switch ON | 11 to 14 |
| MREL (B54-14) - E1 (B53-38) | EFI main relay | Ignition switch OFF | 0 to 1.5 |
| +B1 (B54-19) - E1 (B53-38) | EFI main relay | Ignition switch ON | 11 to 14 |
| +B1 (B54-19) - E1 (B53-38) | EFI main relay | Ignition switch OFF | 0 to 1.5 |
| +B2 (B54-22) - E1 (B53-38) | EFI main relay | Ignition switch ON | 11 to 14 |
| +B2 (B54-22) - E1 (B53-38) | EFI main relay | Ignition switch OFF | 0 to 1.5 |
| +B3 (B54-23) - E1 (B53-38) | EFI main relay | Ignition switch ON | 11 to 14 |
| +B3 (B54-23) - E1 (B53-38) | EFI main relay | Ignition switch OFF | 0 to 1.5 |
| VG (B54-1) - E1 (B53-38) | Mass air flow meter | Idling, A/C switch OFF | - |
| EVG (B54-8) - E1 (B53-38) | Mass air flow meter (Intake air temperature sensor) | Idling, intake air temperature at 20 °C | - |
| DIAG (B53-16) - E2 (B54-12) | Glow plug Relay | Cranking | - |
| DIAG (B53-16) - E2 (B54-12) | Glow plug Relay | Idling | - |
| COM (B53-33) - E2 (B54-12) | Glow plug Relay | Cranking | - |
| COM (B53-33) - E2 (B54-12) | Glow plug Relay | Idling | - |
| THW (B53-37) - ETHW (B54-2) | Engine coolant temperature sensor | Idling, engine coolant temperature at 20 °C | - |
| THF (B54-3) - ETHF (B53-34) | Fuel temperature sensor | Ignition switch ON | - |
| THIA (B53-2) - ETHIA (B53-15) | Turbocharger air temperature sensor | Idling, turbocharger air temperature at 20 °C | - |
| VPC (B53-13) - EPC (B54-7) | Fuel pressure sensor | Ignition switch ON | 4.5 to 5.5 |
| PC (B54-6) - EPC (B54-7) | Fuel pressure sensor | Ignition switch ON, Idling | - |
| VG (B53-10) - G- (B53-18) | Camshaft position sensor | Ignition switch ON | 4.5 to 5.5 |
| G+ (B54-9) - G- (B53-18) | Camshaft position sensor | Ignition switch ON, Idling | Pulse generation 1 |
| VNE (B53-7) - NE- (B53-20) | Crankshaft position sensor | Ignition switch ON | 4.5 to 5.5 |
| NE+ (B53-19) - NE- (B53-20) | Crankshaft position sensor | Ignition switch ON, Idling | Pulse generation 2 |
| VPIM (B53-11) - EPIM (B53-22) | Turbo pressure sensor | Ignition switch ON | 4.5 to 5.5 |
| PIM (B54-5) - EPIM (B53-22) | Turbo pressure sensor | Ignition switch ON, Idling | Pulse generation 3 |
| SGE (A35-31) - SS2E (A35-26) (LHD) | Accelerator position sensor | Ignition switch ON | 4.5 to 5.5 |
| SGE (A36-31) - SS2E (A36-26) (RHD) | Accelerator position sensor | Ignition switch ON | 4.5 to 5.5 |
| PVS1 (A35-27) - SS2E (A35-26) (LHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully released | Pulse generation 4 |
| PVS1 (A35-27) - SS2E (A35-26) (LHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully depressed | Pulse generation 4 |
| PVS1 (A36-27) - SS2E (A36-26) (RHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully released | Pulse generation 4 |
| PVS1 (A36-27) - SS2E (A36-26) (RHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully depressed | Pulse generation 4 |
| PVS2 (A35-10) - SS2E (A35-26) (LHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully released | Pulse generation 4 |
| PVS2 (A35-10) - SS2E (A35-26) (LHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully depressed | Pulse generation 4 |
| PVS2 (A36-10) - SS2E (A36-26) (RHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully released | Pulse generation 4 |
| PVS2 (A36-10) - SS2E (A36-26) (RHD) | Accelerator position sensor | Ignition switch ON, Accelerator pedal fully depressed | Pulse generation 4 |
| VBK (A35-11) - GND1 (A35-28) (LHD) | Stop light switch | Ignition switch ON | 11 to 14 |
| VBK (A36-11) - GND1 (A36-28) (RHD) | Stop light switch | Ignition switch ON | 11 to 14 |
| BRKR (A35-20) - GND1 (A35-28) (LHD) | Stop light switch | Ignition switch ON, Brake pedal fully released | 11 to 14 |
| BRKR (A35-20) - GND1 (A35-28) (LHD) | Stop light switch | Ignition switch ON, Brake pedal fully depressed | 0 to 3 |
| BRKR (A36-20) - GND1 (A36-28) (RHD) | Stop light switch | Ignition switch ON, Brake pedal fully released | 11 to 14 |
| BRKR (A36-20) - GND1 (A36-28) (RHD) | Stop light switch | Ignition switch ON, Brake pedal fully depressed | 0 to 3 |
| W (B54-15) - E1 (B53-38) | MIL | MIL illuminated | 0 to 3 |
| W (B54-15) - E1 (B53-38) | MIL | MIL not illuminated | 11 to 14 |
| CANH (A35-4) - GND1 (A35-28) (LHD) | Terminal CANH of DLC3 | Ignition switch ON | 2.5 to 3.5 |
| CANH (A36-4) - GND1 (A36-28) (RHD) | Terminal CANH of DLC3 | Ignition switch ON | 2.5 to 3.5 |
| CANL (A35-3) - GND1 (A35-28) (LHD) | Terminal CANL of DLC3 | Ignition switch ON | 1.5 to 2.5 |
| CANL (A36-3) - GND1 (A36-28) (RHD) | Terminal CANL of DLC3 | Ignition switch ON | 1.5 to 2.5 |
| TROT (B53-47) - E2 (B54-12) | Throttle valve (for EGR) | Ignition switch ON, Idling | Pulse generation 5 |
| VCV (B53-48) - E2 (B54-12) | Fuel flow regulator valve | Ignition switch ON, Idling | Pulse generation 6 |
| PCV (B53-44) - E2 (B54-12) | Pressure control valve | Ignition switch ON, Idling | Pulse generation 7 |
| #10 (B54-28) - PINJ1 (B54-29) | Injector | Ignition switch ON, Idling | Pulse generation 8 |
| #20 (B54-25) - PINJ2 (B54-30) | Injector | Ignition switch ON, Idling | Pulse generation 8 |
| #30 (B54-26) - PINJ3 (B54-32) | Injector | Ignition switch ON, Idling | Pulse generation 8 |
| #40 (B54-27) - PINJ4 (B54-31) | Injector | Ignition switch ON, Idling | Pulse generation 8 |
| EGR+ (B53-31) - EGR- (B53-29) | EGR valve (Motor) | Ignition switch ON, Idling | Pulse generation 9 |
| VEGLS (B53-4) - EEGLS (B53-36) | EGR valve (Position sensor) | Ignition switch ON | 4.5 to 5.5 |
| EGLS (B53-23) - EEGLS (B53-36) | EGR valve (Position sensor) | Ignition switch ON, Idling | - |
| GIND (B54-16) - E2 (B54-12) | Glow indicator light | Cranking | 0 to 3 |
| GIND (B54-16) - E2 (B54-12) | Glow indicator light | Idling | 11 to 14 |
| SPD (B54-10) - E2 (B54-12) | Speed signal | Ignition switch ON, rotate driving wheel slowly | - |
| TACH (B54-21) - E2 (B54-12) | Terminal TAC of DLC3 | Idling | - |
| ALT (B54-17) - E2 (B54-12) | Generator (alternator) duty ratio | Idling | Pulse generation |
| KLIN (A35-8) - GND1 (A35-28) (LHD) | Terminal SIL of DLC3 | Connect the intelligent tester to DLC3 | - |
| KLIN (A36-8) - GND1 (A36-28) (RHD) | Terminal SIL of DLC3 | Connect the intelligent tester to DLC3 | - |
| 5V (A35-22) - GND (A35-24) (LHD) | A/C pressure sensor | Ignition switch ON | 4.5 to 5.5 |
| 5V (A36-22) - GND (A36-24) (RHD) | A/C pressure sensor | Ignition switch ON | 4.5 to 5.5 |
| PDIN (A35-30) - GND (A35-24) (LHD) | A/C pressure sensor | Ignition switch ON, AC switch ON, Idling | - |
| PDIN (A36-30) - GND (A36-24) (RHD) | A/C pressure sensor | Ignition switch ON, AC switch ON, Idling | - |
| RXIM (A35-12) - E1 (B53-38) (LHD) | Transponder key ECU | Ignition switch ON | - |
| RXIM (A36-12) - E1(B53-38) (RHD) | Transponder key ECU | Ignition switch ON | - |
| TXIM (A35-14) - E1 (B53-38) (LHD) | Transponder key ECU | Ignition switch ON | - |
| TXIM (A36-14) - E1 (B53-38) (RHD) | Transponder key ECU | Ignition switch ON | - |
| HOT (B54-20) - E2 (B54-12) | Water temperature warning light | Water temperature warning light is illuminated | - |
| HOT (B54-20) - E2 (B54-12) | Water temperature warning light | Water temperature warning light is not illuminated | - |
| GMV (B54-4) - E2 (B54-12) | Cooling fan resistor | Ignition switch ON | - |
| GMV1 (B54-18) - E2 (B54-12) | Cooling fan resistor | Cooling fan rotating | - |
| GMV1 (B54-18) - E2 (B54-12) | Cooling fan resistor | Cooling fan not rotating | - |
| GMV2 (A35-16) - E2 (B54-12) (LHD) (w/ A/C) | Cooling fan resistor | Cooling fan rotating | - |
| GMV2 (A35-16) - E2 (B54-12) (LHD) (w/ A/C) | Cooling fan resistor | Cooling fan not rotating | - |
| GMV2 (A36-16) - E2 (B54-12) (RHD) (w/ A/C) | Cooling fan resistor | Cooling fan rotating | - |
| GMV2 (A36-16) - E2 (B54-12) (RHD) (w/ A/C) | Cooling fan resistor | Cooling fan not rotating | - |
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Pulse generation 1
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The waveform between terminals G+ and G- of the ECM connectors with the engine idling.
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Pulse generation 2
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The waveform between terminals NE+ and NE- of the ECM connectors with the engine idling.
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Pulse generation 3
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The waveform between terminals PIM and EPIM of the ECM connectors with the engine idling.
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Pulse generation 4
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The waveform between terminals PVS1, PVS2 and SS2E of the ECM connectors.
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Pulse generation 5
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The waveform between terminals TROT and E2 of the ECM connectors with the engine idling.
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Pulse generation 6
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The waveform between terminals VCV and E2 of the ECM connectors with the engine idling.
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Pulse generation 7
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With the engine idling, the waveform between terminals PCV and E2 of the ECM connector.
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Pulse generation 8
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The waveform between terminals #10 to #40 and PINJ1 to PINJ4 of the ECM connectors with the engine idling.
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Pulse generation 9
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The waveform between terminals EGR+ and EGR- of the ECM connector.
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