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HOMESERVICE MANUALSACURA2005TSX AUTOMATICREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSIONSYSTEM DESCRIPTIONELECTRONIC CONTROL SYSTEMPCM INPUTS AND OUTPUTS
2005 Acura TSX Automatic
PCM Inputs and Outputs
2005 Acura TSX AutomaticSECTION PCM Inputs and Outputs
PCM CONNECTOR A (31P)
PCM CONNECTOR A (31P)
| Terminal number | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| A2 | YEL/BLK | IGP2 (POWER SOURCE) | Power source for PCM circuit | With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V |
| A3 | YEL/BLK | IGP1 (POWER SOURCE) | Power source for PCM circuit | With ignition switch ON (II): Battery voltage With ignition switch LOCK (0): About 0 V |
| A4 | BLK | PG2 (POWER GROUND) | Ground circuit for PCM | Less than 1.0 V at all times |
| A5 | BLK | PG1 (POWER GROUND) | Ground circuit for PCM | Less than 1.0 Vat all times |
| A8 | BRN/YEL | LG2 (LOGIC GROUND) | Ground circuit for PCM | Less than 1.0 Vat all times |
| A9 | BRN/YEL | LG1 (LOGIC GROUND) | Ground circuit for PCM | Less than 1.0 Vat all times |
| A18 | BLK/BLU | NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) | Detects output shaft (countershaft) speed sensor signal | With ignition switch ON (II): About 0 V or about 5.0 V With vehicle moving: About 1.5-3.5 V (pulses) |
| A20 | YEL/BLU | VCC2 (SENSOR VOLTAGE) | Provides sensor reference voltage | With ignition switch ON (II): About 5.0 V With ignition switch LOCK (0): About 0 V |
| A21 | YEL/RED | VCC1 (SENSOR VOLTAGE) | Provides sensor reference voltage | With ignition switch ON (II): About 5.0 V With ignition switch LOCK (0): About 0 V |
| A23 | GRN/YEL | SG2 (SENSOR GROUND) | Sensor ground | Less than 1.0 V at all times |
| A24 | GRN/WHT | SG1 (SENSOR GROUND) | Sensor ground | Less than 1.0 V at all times |
| A25 | RED/YEL | APSB (ACCELERATOR PEDAL POSITION (APP) SENSOR B) | Detects APP sensor B signal | With ignition switch ON (II) and accelerator pedal fully pressed: About 2.3 V With ignition switch ON (II) and accelerator pedal released: About 0.2 V |
| A26 | RED/BLU | APSA (ACCELERATOR PEDAL POSITION (APP) SENSOR A) | Detects APP sensor A signal | With ignition switch ON (II) and accelerator pedal fully pressed: About 4.5 V With ignition switch ON (II) and accelerator pedal released: About 0.5 V |
| A30 | GRN/RED | MAP (MANIFOLD ABSOLUTE PRESSURE SENSOR) | Detects MAP sensor signal | With ignition switch ON (II): About 3.0 V At idle: About 1.5 V (depending on engine speed) |
PCM CONNECTOR C (22P)
PCM CONNECTOR C (22P)
| Terminal number | Wire color | Terminal name | Description | Signal |
|---|---|---|---|---|
| C1 | RED/BLK | LS A (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A) | Drives A/T clutch pressure control solenoid valve A | With ignition switch ON (II): Current controlled |
| C2 | GRN | SHC (SHIFT SOLENOID VALVE C) | Drives shift solenoid valve C | With engine running in N, and D, D3, and M (in 1st, 3rd, and 5th gears): Battery voltage With engine running in P, R, and D, D3, and M (in 2nd and 4th gears): About 0 V |
| C3 | YEL | SHE (SHIFT SOLENOID VALVE E) | Drives shift solenoid valve E | With engine running in P and R: Battery voltage With engine running in R (Reverse inhibit in R), N, and D, D3, and M: About 0 V |
| C4 | GRN/WHT | SH B (SHIFT SOLENOID VALVE B) | Drives shift solenoid valve B | With engine running in P, R, N, and D, D3, and M (in 1st and 2nd gears): Battery voltage With engine running in D, D3, and M (in 3rd, 4th, and 5th gears): About 0 V |
| C5 | GRN/RED | SHD (SHIFT SOLENOID VALVE D) | Drives shift solenoid valve D | With engine running in D, D3, and M (in 2nd and 5th gears): Battery voltage With engine running in P, R, N, and D, D3, and M (in 1st, 3rd, and 4th gears): About 0 V |
| C6 | BLU/BLK | SH A (SHIFT SOLENOID VALVE A) | Drives shift solenoid valve A | With engine running in R, and D, D3, and M (in 1st, 4th, and 5th gears): Battery voltage With engine running in P, N, and D, D3, and M (in 2nd and 5th gears): About 0 V |
| C7 | BLU/YEL | LSC (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE C) | Drives A/T clutch pressure control solenoid valve C | With ignition switch ON (II): Current controlled |
| C9 | RED | ATP D3 (TRANSMISSION RANGE SWITCH D3) | Detects transmission range switch D3 position signal | In D3: About 0 V In any position other than D3: About 5.0 V |
| C10 | BLU/WHT | OP3SW (3RD CLUTCH TRANSMISSION FLUID PRESSURE SWITCH) | Detects 3rd clutch transmission fluid pressure switch signal | With ignition switch ON (II):
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| C11 | BLU/YEL | P-PIN SW (PARK PIN SWITCH) | Detects park pin switch signal | With ignition switch ON (II), in P: About 0 V With ignition switch ON (II), in other than P: About 5.0 V |
| C12 | RED/WHT | ATP RVS (TRANSMISSION RANGE SWITCH RVS) | Detects transmission range switch RVS signal | In R: About 0 V In any position other than R: About 5.0 V |
| C13 | BLU/RED | OP2SW (2ND CLUTCH TRANSMISSION FLUID PRESSURE SWITCH) | Detects 2nd clutch transmission fluid pressure switch signal | With ignition switch ON (II):
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| C14 | RED/YEL | ATFT (ATF TEMPERATURE SENSOR) | Detects ATF temperature sensor signal | With ignition switch ON (II): About 0.2-4.8 V (about 1.8 V at operating temperature) (depending on ATF temperature) |
| C15 | BRN/WHT | LS B(A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B) | Drives A/T clutch pressure control solenoid valve B | With ignition switch ON (II): Current controlled |
| C17 | YEL/GRN | ATP D (TRANSMISSION RANGE SWITCH D) | Detects transmission range switch D position signal | In D: About 0 V In any position other than D: About 5.0 V |
| C18 | BLU/YEL | ATP FWD (TRANSMISSION RANGE SWITCH FWD) | Detects transmission range switch FWD signal | In D and D3: About 0 V In any position other than D and D3: About 5.0 V |
| C19 | WHT/RED | NM (INPUT SHAFT (MAINSHAFT) SPEED SENSOR) | Detects input shaft (mainshaft) speed sensor signal | With ignition switch ON (II): About 0 V or about 5.0 V With engine idling in N: About 1.5-3.5 V (pulses) |
| C20 | RED/BLK | ATP N (TRANSMISSION RANGE SWITCH N) | Detects transmission range switch N position signal | In N: About 0 V In any position other than N: About 5.0 V |
PCM CONNECTOR D (17P)
PCM CONNECTOR D (17P)
| Terminal number | Wire color | Terminal name | Description | Signal | ||||
|---|---|---|---|---|---|---|---|---|
| D2 | BRN | S-MODE (SEQUENTIAL SHIFT MODE) | Detects transmission gear selection switch S mode switch signal | In M: About 0 V In any position other than M: About 5.0 V |
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| D3 | WHT/BLU(1) WHT(2) | S-UP (UPSHIFT SWITCH) | Detects transmission gear selection switch upshift switch signal | In M and shift lever pushed toward upshift position: About 0 V In M and shift lever in neutral position: About 5.0 V |
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| D5 | WHT | ATP R (TRANSMISSION RANGE SWITCH R) | Detects transmission range switch R position signal | In R: About 0 V In any position other than R: About 5.0 V |
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| D6 | BLU/BLK(1) BLU(2) | ATP P (TRANSMISSION RANGE SWITCH P) | Detects transmission range switch P position signal | In P: About 0 V In any position other than P: About 5.0 V |
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| D9 | ORN | S-DN (DOWNSHIFT SWITCH) | Detects transmission gear selection switch downshift switch signal | In M and shift lever pushed toward downshift position: About 0 V In M and shift lever in neutral position: About 5.0 V |
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| D10 | LT GRN | MET INH (METER DISPLAY INHIBIT SIGNAL) | Sends inhibit signal | With ignition switch ON (II): Battery voltage | ||||
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PCM CONNECTOR E (31P)
PCM CONNECTOR E (31P)
| Terminal number | Wire color | Terminal name | Description | Signal | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| E2 | YEL/BLK(1) YEL(2) | SLS (SHIFT LOCK SOLENOID) | Drives shift lock solenoid | With ignition switch ON (II), in P, brake pedal pressed, and accelerator released: About 0 V | ||||||
| E7 | RED/YEL(1) YEL(2) | MRLY (PGM-FIMAIN RELAY) | Drives PGM-FI main relay 1 (Fl MAIN) Power source for DTC memory | With ignition switch ON (II): About 0 V With ignition switch LOCK (0): Battery voltage |
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| E9 | BLK/YEL | IG1 (IGNITION SWITCH) | Detects ignition switch signal | With ignition switch ON (II): Battery voltage | ||||||
| E11 | WHT | CAN H (CAN COMMUNICATION SIGNAL HIGH) | Sends and receives communication signal | With ignition switch ON (II): About 2.5 V (pulses) | ||||||
| E22 | WHT/BLK | BKSW (BRAKE PEDAL POSITION SWITCH) | Detects brake pedal position switch signal | With brake pedal released: About 0 V With brake pedal pressed: Battery voltage |
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| E23 | BLU(3) | K-LINE | Sends and receives HDS signal | With ignition switch ON (II): Battery voltage | ||||||
| E24 | RED | CAN L (CAN COMMUNICATION SIGNAL LOW) | Sends and receives communication signal | With ignition switch ON (II): About 2.5 V (pulses) | ||||||
| E29 | BRN | SCS (SERVICE CHECK SIGNAL) | Detects service check signal | With the service check signal shorted using HDS: About 0 V With the service check signal open: About 5.0 V |
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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.