Engine Control Module (ECM)
| Description | Connector No. | Terminal No. | Signal (V) | Note | ||
|---|---|---|---|---|---|---|
| Ignition SW ON (Engine OFF) | Engine ON (Idling) | |||||
| Crankshaft position sensor | (+) signal | B136 | 16 | 5 | 0 or 5 | Waveform* |
| (-) signal | B136 | 27 | 0 | 0 | - | |
| Front oxygen (A/F) sensor | (+) signal | B136 | 19 | 2.8 - 3.2 | 2.8 - 3.2 | - |
| (-) signal | B136 | 18 | 2.4 - 2.7 | 2.4 - 2.7 | - | |
| Rear oxygen sensor | Signal | B136 | 21 | 0 | 0 - 0.9 | - |
| Front oxygen (A/F) sensor heater signal | B136 | 5 | Battery voltage | 0 or battery voltage | Waveform | |
| Rear oxygen sensor heater signal | B134 | 6 | Battery voltage | 0 or battery voltage | Waveform | |
| Oxygen sensor | Shield | B136 | 30 | 0 | 0 | - |
| Engine coolant temperature sensor | Signal | B134 | 30 | 1 - 1.4 | 1 - 1.6 | - |
| Air flow sensor | Signal | B137 | 22 | - | 0.3 - 4.5 | - |
| Shield | B137 | 28 | 0 | 0 | - | |
| Ground | B137 | 29 | 0 | 0 | - | |
| Intake air temperature sensor signal | B137 | 12 | 0.3 - 4.6 | 0.3 - 4.6 | - | |
| Engine oil temperature sensor signal | B134 | 20 | 1 - 1.4 | 1 - 1.6 | - | |
| Starter switch | B137 | 17 | Waveform | Waveform | Model without push button start: Waveform Models with push button start: Waveform | |
| Accessory cut request | B135 | 32 | Waveform | Waveform | Model without push button start: Waveform Models with push button start: Waveform | |
| Starter switch 2 | B137 | 14 | Waveform | Waveform | Model without push button start: Waveform Models with push button start: Waveform | |
| Starter cut relay | B135 | 34 | Waveform | Waveform | Model without push button start: Waveform Models with push button start: Waveform | |
| Ignition switch | B137 | 27 | Battery voltage | Battery voltage | - | |
| Neutral position switch | B137 | 16 | ON: 0 OFF: Battery voltage |
ON: 0 OFF: Battery voltage |
- | |
| Delivery mode switch | B137 | 13 | Battery voltage | Battery voltage | When fuse is installed: 0 | |
| Knock sensor | Signal | B136 | 28 | 2.5 | 2.5 | - |
| Shield | B136 | 29 | 0 | 0 | - | |
| Back-up power supply | B137 | 2 | Battery voltage | Battery voltage | - | |
| Control module power supply | B136 | 6 | Battery voltage | Battery voltage | - | |
| B137 | 1 | Battery voltage | Battery voltage | - | ||
| Sensor power supply | B134 | 19 | 5 | 5 | - | |
| B135 | 22 | 5 | 5 | - | ||
| Ignition control | #1 | B134 | 21 | 0 | 0 or 5 | Waveform |
| #2 | B134 | 10 | 0 | 0 or 5 | Waveform | |
| #3 | B134 | 31 | 0 | 0 or 5 | Waveform | |
| #4 | B134 | 8 | 0 | 0 or 5 | Waveform | |
| Fuel injector | #1 | B134 | 12 | Battery voltage | 0 or battery voltage | Waveform |
| #2 | B134 | 22 | Battery voltage | 0 or battery voltage | Waveform | |
| #3 | B134 | 32 | Battery voltage | 0 or battery voltage | Waveform | |
| #4 | B134 | 13 | Battery voltage | 0 or battery voltage | Waveform | |
| Fuel pump relay control | B135 | 19 | Battery voltage | ON: 0.5 or less OFF: Battery voltage |
- | |
| A/C relay control | B135 | 35 | ON: 0.5 or less OFF: Battery voltage |
ON: 0.5 or less OFF: Battery voltage |
- | |
| A/C switch | B137 | 26 | ON: Battery voltage OFF: 0 |
ON: Battery voltage OFF: 0 |
Manual A/C model | |
| Blower fan switch | B137 | 20 | ON: 0 OFF: Battery voltage |
ON: 0 OFF: Battery voltage |
Manual A/C model | |
| A/C middle pressure switch | B137 | 8 | ON: 0 OFF: Battery voltage |
ON: 0 OFF: Battery voltage |
- | |
| Main fan relay control | B135 | 12 | ON: 0.5 or less OFF: Battery voltage |
ON: 0.5 or less OFF: Battery voltage |
- | |
| Sub fan relay control | B135 | 11 | ON: 0.5 or less OFF: Battery voltage |
ON: 0.5 or less OFF: Battery voltage |
- | |
| Engine speed output | B135 | 15 | - | 0 or battery voltage | Waveform | |
| Purge control solenoid valve | B134 | 11 | Battery voltage | Battery voltage | When in operation: 0 or battery voltage | |
| EGR control valve | Signal 1 | B136 | 11 | Battery voltage | 0 or battery voltage | - |
| Signal 2 | B136 | 13 | Battery voltage | 0 or battery voltage | - | |
| Signal 3 | B136 | 31 | Battery voltage | 0 or battery voltage | - | |
| Signal 4 | B136 | 32 | Battery voltage | 0 or battery voltage | - | |
| Manifold absolute pressure sensor signal | B136 | 20 | 3.4 - 3.8 | 1 - 1.6 | - | |
| Electronic throttle control | Main signal | B134 | 18 | Approx. 0.7 | Approx. 0.6 - 0.7 | Fully closed: Approx. 0.6 Fully open: Approx. 4.0 |
| Sub signal | B134 | 28 | Approx. 1.6 | Approx. 1.5 - 1.6 | Fully closed: Approx. 1.5 Fully open: Approx. 4.2 |
|
| Electronic throttle control motor (+) | B134 | 2 | Duty waveform | Duty waveform | Drive frequency: 500 Hz | |
| Electronic throttle control motor (-) | B134 | 1 | Duty waveform | Duty waveform | Drive frequency: 500 Hz | |
| Electronic throttle control motor power supply | B135 | 7 | Battery voltage | Battery voltage | - | |
| Electronic throttle control motor relay | B135 | 17 | 0 | 0 | - | |
| Intake oil control solenoid RH | B134 | 17 | Battery voltage | 0 or battery voltage | Waveform | |
| Intake oil control solenoid LH | B134 | 16 | Battery voltage | 0 or battery voltage | Waveform | |
| Exhaust oil control solenoid RH | B134 | 7 | Battery voltage | 0 or battery voltage | Waveform | |
| Exhaust oil control solenoid LH | B134 | 5 | Battery voltage | 0 or battery voltage | Waveform | |
| Intake camshaft position sensor RH | B136 | 26 | 0 or 5 | 0 or 5 | Waveform* | |
| Intake camshaft position sensor LH | B136 | 15 | 0 or 5 | 0 or 5 | Waveform* | |
| Exhaust camshaft position sensor RH | B136 | 14 | 0 or 5 | 0 or 5 | Waveform* | |
| Exhaust camshaft position sensor LH | B136 | 25 | 0 or 5 | 0 or 5 | Waveform* | |
| Camshaft position sensor ground | B136 | 34 | 0 | 0 | - | |
| Accelerator pedal position sensor | Main signal | B135 | 23 | Fully closed: 0.4 - 1 Fully opened: 2.4 - 3.7 |
Fully closed: 0.4 - 1 Fully opened: 2.4 - 3.7 |
- |
| Main power supply | B135 | 21 | 5 | 5 | - | |
| Ground (main) | B135 | 29 | 0 | 0 | - | |
| Sub signal | B135 | 31 | Fully closed: 0.3 - 1.1 Fully opened: 2.3 - 3.8 |
Fully closed: 0.3 - 1.1 Fully opened: 2.3 - 3.8 |
- | |
| Starter relay | B135 | 26 | Waveform | Waveform | Model without push button start: Waveform Models with push button start: Waveform | |
| Clutch switch | B137 | 15 | ON: 0 OFF: Battery voltage |
ON: 0 OFF: Battery voltage |
- | |
| Brake switch 1 (Brake switch) | B137 | 7 | When brake pedal is depressed: 0 When brake pedal is released: Battery voltage |
When brake pedal is depressed: 0 When brake pedal is released: Battery voltage |
- | |
| Brake switch 2 (Stop light switch) | B137 | 3 | When brake pedal is depressed: Battery voltage When brake pedal is released: 0 |
When brake pedal is depressed: Battery voltage When brake pedal is released: 0 |
- | |
| Cruise control command switch | B137 | 30 | When operating nothing: 3.5 - 4.5 When operating RES/ACC: 2.5 - 3.5 When operating SET/COAST: 0.5 - 1.5 When operating CANCEL:0 - 0.5 |
When operating nothing:3.5 - 4.5 When operating RES/ACC: 2.5 - 3.5 When operating SET/COAST: 0.5 - 1.5 When operating CANCEL:0 - 0.5 |
- | |
| Cruise control main switch | B137 | 23 | ON: 0 OFF: 5 |
ON: 0 OFF: 5 |
- | |
| CAN communication (MAIN-CAN) | (Hi) | B137 | 19 | - | - | - |
| (Lo) | B137 | 18 | - | - | - | |
| Self-shutoff control | B135 | 13 | 0 | 0 | - | |
| Generator control | B135 | 18 | 0 or 6.5 | 0 or 6.5 | Waveform | |
| Battery current sensor | B137 | 11 | 2.6 - 2.8 | 2.4 - 2.6 | - | |
| Battery temperature sensor | B137 | 24 | 1.1 - 2.4 | 1.1 - 2.4 | When battery temperature is 20 - 50°C (68 - 122°F) | |
| Oil level switch | B136 | 24 | 0 | 0 | Oil level LOW: Battery voltage |
|
| Tumble generator valve opening angle switch signal RH | B136 | 23 | 0 | Fully closed: 0.5 or less Fully opened: 4.5 or more |
When in operation: Waveform | |
| Tumble generator valve actuator RH open | B134 | 25 | 0 | 0 | When in operation: Waveform | |
| Tumble generator valve actuator RH closed | B134 | 14 | 0 | 0 | When in operation: Waveform | |
| Tumble generator valve opening angle switch signal LH | B136 | 9 | 0 | Fully closed: 0.5 or less Fully opened: 4.5 or more |
When in operation: Waveform | |
| Tumble generator valve actuator LH open | B134 | 23 | 0 | 0 | When in operation: Waveform | |
| Tumble generator valve actuator LH closed | B134 | 24 | 0 | 0 | When in operation: Waveform | |
| Immobilizer communication | B135 | 25 | - | - | - | |
| Leak check valve assembly | Switching valve | B135 | 1 | Battery voltage | Battery voltage | Operating: 0 |
| Pressure sensor | B135 | 20 | 1 - 4 | 1 - 4 | - | |
| Vacuum pump | B135 | 8 | Battery voltage | Battery voltage | Operating: 0 | |
| Ground | Sensor | B134 | 29 | 0 | 0 | - |
| B135 | 30 | 0 | 0 | - | ||
| Engine 1 | B134 | 4 | 0 | 0 | - | |
| Engine 2 | B134 | 3 | 0 | 0 | - | |
| Engine 3 | B136 | 1 | 0 | 0 | - | |
| Engine 4 | B136 | 2 | 0 | 0 | - | |
| Engine 5 | B136 | 3 | 0 | 0 | - | |
| Body | B137 | 4 | 0 | 0 | - | |
NOTE:
- Perform measurement after warming up the engine.
- Place the select lever in "P" range or "N" range.
- Turn the A/C to OFF.
- Turn all the accessory switches to OFF.
- Waveforms vary depending on a measurement environment and vehicle condition.
*Waveform
NOTE:
- For measurement of the waveform of the crankshaft position sensor, we recommend using the DST-i oscilloscope function or a general oscilloscope.
- The waveform of the crankshaft position sensor may appear as shown in figure (B) when measured by the Subaru Select Monitor oscilloscope function.
This is because the output unit of the crankshaft position sensor is smaller than the minimal measurement unit of the Subaru Select Monitor, and therefore this phenomenon is not a malfunction of either the Subaru Select monitor or the crankshaft position sensor.
| Measured terminal | Crankshaft position sensor (+) signal (B136) No. 16 (+) - Engine ground 3 (B136) No. 1 (-): |
| Intake camshaft position sensor RH (B136) No. 26 (+) - Engine ground 3 (B136) No. 1 (-): | |
| Intake camshaft position sensor LH (B136) No. 15 (+) - Engine ground 3 (B136) No. 1 (-): | |
| Exhaust camshaft position sensor RH (B136) No. 14 (+) - Engine ground 3 (B136) No. 1 (-): | |
| Exhaust camshaft position sensor LH (B136) No. 25 (+) - Engine ground 3 (B136) No. 1 (-): | |
| Measuring condition | While engine idling |