Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA2015RLXREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALMECHANICALENGINE CONTROL SYSTEM / ENGINE MECHANICAL - SERVICE, TESTING & TROUBLESHOOTING (EXCEPT HYBRID)CONNECTOR VIEWPCM INPUTS AND OUTPUTS (2018 2019 2020)PCM CONNECTOR B (Δ) (51P) (FEMALE TERMINALS)
2015 Acura RLX
PCM Connector B (Δ) (51P) (female terminals)
2015 Acura RLXSECTION PCM Connector B (Δ) (51P) (female terminals)
| Terminal number | Terminal name | Description |
|---|---|---|
| 1 | IG1(VBSOL) (POWER SOURCE FOR SOLENOID VALVES) | Power source for solenoid valves |
| 2 | Not used | |
| 3 | Not used | |
| 4 | Not used | |
| 5 | Not used | |
| 6 | Not used | |
| 7 | Not used | |
| 8 | Not used | |
| 9 | Not used | |
| 10 | IGP (POWER SOURCE) | Power source for PCM |
| 11 | GND1 PG (POWER GROUND) | Ground for PCM |
| 12 | Not used | |
| 13 | Not used | |
| 14 | INJ Ti 1 (No. 1 INJECTOR CONTROL DRIVE SIGNAL) | No. 1 injector drive signal |
| 15 | INJ Ti 2 (No. 2 INJECTOR CONTROL DRIVE SIGNAL) | No. 2 injector drive signal |
| 16 | INJ Ti 3 (No. 3 INJECTOR CONTROL DRIVE SIGNAL) | No. 3 injector drive signal |
| 17 | INJ Ti 4 (No. 4 INJECTOR CONTROL DRIVE SIGNAL) | No. 4 injector drive signal |
| 18 | INJ Ti 5 (No. 5 INJECTOR CONTROL DRIVE SIGNAL) | No. 5 injector drive signal |
| 19 | INJ Ti 6 (No. 6 INJECTOR CONTROL DRIVE SIGNAL) | No. 6 injector drive signal |
| 20 | GND2 LG (LOGIC GROUND) | Ground for PCM |
| 21 | IGN PULSE5 (No. 5 IGNITION COIL PULSE) | Drives No. 5 ignition coil |
| 22 | IGN PULSE6 (No. 6 IGNITION COIL PULSE) | Drives No. 6 ignition coil |
| 23 | Not used | |
| 24 | Not used | |
| 25 | Not used | |
| 26 | Not used | |
| 27 | Not used | |
| 28 | Not used | |
| 29 | Not used | |
| 30 | Not used | |
| 31 | THL1 (THROTTLE POSITION (TP) SENSOR A) | Detects TP sensor A signal |
| 32 | IGN PULSE3 (No. 3 IGNITION COIL PULSE) | Drives No. 3 ignition coil |
| 33 | IGN PULSE4 (No. 4 IGNITION COIL PULSE) | Drives No. 4 ignition coil |
| 34 | Not used | |
| 35 | PF (FUEL RAIL PRESSURE SENSOR) | Detects fuel rail pressure sensor signal |
| 36 | Not used | |
| 37 | Not used | |
| 38 | Not used | |
| 39 | Not used | |
| 40 | THL2 (THROTTLE POSITION (TP) SENSOR B) | Detects TP sensor B signal |
| 41 | IGN PULSE1 (No. 1 IGNITION COIL PULSE) | Drives No. 1 ignition coil |
| 42 | IGN PULSE2 (No. 2 IGNITION COIL PULSE) | Drives No. 2 ignition coil |
| 43 | VCC2 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 44 | VCC5 (SENSOR VOLTAGE) | Provides sensor reference voltage |
| 45 | SG2 (SENSOR GROUND) | Sensor ground |
| 46 | SG5 (SENSOR GROUND) | Sensor ground |
| 47 | OP SENSOR (ENGINE OIL PRESSURE) | Detects rocker arm oil pressure sensor signal |
| 48 | Not used | |
| 49 | Not used | |
| 50 | LIN (LOCAL INTERCONNECT NETWORK) | Sends and receives communication signal |
| 51 | TDC (CAMSHAFT POSITION (CMP) SENSOR) | Detects CMP sensor signal |
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.