Subaru Crosstrek Service Manual: Engine control module (ecm) i/o signal Electrical specification
ENGINE (DIAGNOSTICS)(H4DO) > Engine Control Module (ECM) I/O Signal
ELECTRICAL SPECIFICATION
1. 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 | ||
Electrical component location Location
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General diagnostic table Inspection
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Other materials:
Front differential assembly Note
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Location
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Removal
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