LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Honda >> 2010 >> CR-V EX, 2.4 RE4 >> Repair and Diagnosis >> Engine Performance >> System >> Fuel And Emissions Systems >> System Description >> PCM Inputs and Outputs at PCM Connector B (Δ) (49P)
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PCM Inputs and Outputs at PCM Connector B (Δ) (49P)

Fig 1: Identifying PCM Connector B (49P) Terminals
G06610213Courtesy of AMERICAN HONDA MOTOR CO., INC.
PCM CONNECTOR B (49P) REFERENCE

Terminal number Wire color Terminal name Description Signal
1 BLK PG2 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
3 YEL/BLU PCS (EVAPORATIVE EMISSION (EVAP) CANISTER PURGE VALVE) Drives EVAP canister purge valve With engine running, engine coolant below 149 °F (65 °C) battery voltage
With engine running, engine coolant above 149 °F (65 °C). duty controlled
4 BLK/WHT SO2SHTC (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) (SENSOR 2) HEATER) Drives secondary HO2S (sensor 2) heater With ignition switch ON (II). battery voltage With warmed up engine running: duty controlled
7 YEL/RED OPSW (OIL PRESSURE SWITCH) Detects engine oil pressure signal With ignition switch ON (II) about 0 V With engine running battery voltage
8 BLU/RED OP2SW (TRANSMISSION FLUID PRESSURE SWITCH A (2ND CLUTCH)) Detects transmission fluid pressure switch A (2nd clutch) input With ignition switch ON (II)
  • Without 2nd clutch pressure: about 5.0 V
  • With 2nd clutch pressure about 0 V
9 BLU/WHT OP3SW (TRANSMISSION FLUID PRESSURE SWITCH B (3RD CLUTCH)) Detects transmission fluid pressure switch B (3rd clutch) input With ignition switch ON (II)
  • Without 3rd clutch pressure: about 5.0 V
  • With 3rd clutch pressure: about 0 V
10 BLK PG1 (POWER GROUND) Ground circuit for PCM Less than 0.2 V at all times
11 BLU/BLK SHA (SHIFT SOLENOID VALVE A) Drives shift solenoid valve A With engine running in R, D (in 1st, 4th, and 5th gears), D3 (in 1st gear), and 1: battery voltage With engine running in P, N, D, and D3 (in 2nd and 3rd gears) and 2 about 0 V
12 GRN/WHT SHB (SHIFT SOLENOID VALVE B) Drives shift solenoid valve B With engine running in P, R, N, D, and D3 (in 1st and 2nd gears), 2, and 1 battery voltage With engine running in D (in 3rd, 4th, 5th gears), D3 (in 3rd gear), 2, and 1 about 0 V
13 RED/BLK ATPN (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
14 BLU/BLK ATPP (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
15 WHT ATPR (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
16 BRN ATP1 (TRANSMISSION RANGE SWITCH 1) Detects transmission range switch 1 position signal In 1 about 0 V In any position other than 1 battery voltage
17 BLU ATP2 (TRANSMISSION RANGE SWITCH 2) Detects transmission range switch 2 position signal In 2: about 0 V In any position other than 2 battery voltage
18 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 position about 2 5V (pulses)
19 YEL/BLU VCC2 (SENSOR VOLTAGE) Provides sensor reference voltage With ignition switch ON (II). about 5.0 V
21 GRN SHC (SHIFT SOLENOID VALVE C) Drives shift solenoid valve C With engine running in N, D (in 1st, 3rd, and 5th gears), D3 (in 1st and 3rd gears), and 1 battery voltage With engine running in P, R, D (in 2nd and 4th gears), D3 (in 2nd gear), and 2 about 0 V
22 YEL/GRN ATPD (TRANSMISSION RANGE SWITCH D) Detects transmission range switch D position signal In D. about 0 V In any position other than D battery voltage
23 RED/WHT ATPRVS (TRANSMISSION RANGE SWITCH RVS) Detects transmission range switch R position signal In R. about 0 V In any position other than R battery voltage
24 RED/WHT ECT1 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1) Detects ECT sensor 1 signal With ignition switch ON (II). about 0 1-4.8 V (depending on engine coolant temperature)
25 YEL SHE (SHIFT SOLENOID VALVE E) Drives shift solenoid valve E With engine running in P and R battery voltage With engine running in, N, D and D3 (in 1st gear), 2, and 1. about 0 V
26 BLU/YEL LSC (AT CLUTCH PRESSURE CONTROL SOLENOID VALVE C) Drives A/T clutch pressure control solenoid valve C With ignition switch ON (II). current controlled
27 GRN/RED SHD (SHIFT SOLENOID VALVE D) Drives shift solenoid valve D With engine running in D (in 2nd and 5th gears), D3 (in 2nd gear), and 2 battery voltage With engine running in P, R, N, D (in 1st, 3rd and 4th gears), D3 (in 1st and 3rd gears), and 1. about 0 V
28 RED/YEL TATF (ATF TEMPERATURE SENSOR) Detects ATF temperature sensor signal With ignition switch ON (II) about 0.2-4.8 V (depending on ATF temperature)
29 BLU/YEL ATPFWD (TRANSMISSION RANGE SWITCH FWD) Detects transmission range switch D, D3, 2 positions signal In D, D3, and 2. about 0 V In any position other than D, D3, and 2 battery voltage
31 RED/BLK VG+ (MASS AIR FLOW (MAF) SENSOR +SIDE) Detects MAF sensor signal At idle with warmed up engine and no electrical load: about 1.3 V
32 RED/YEL IAT (INTAKE AIR TEMPERATURE (IAT) SENSOR) Detects IAT sensor signal With ignition switch ON (II): about 0.1 -4.0 V (about 1.8 V at normal operating temperature)
33 BLK/BLU VG- (MASS AIR FLOW (MAF) SENSOR-SIDE) Ground for MAF sensor signal  
34 GRN/BLK SG2 (SENSOR GROUND) Sensor ground Less than 0.2 V at all times
35 GRN/YEL VTS (ROCKER ARM OIL CONTROL SOLENOID) Drives rocker arm oil control solenoid At idle about 0 V
36 WHT/RED SHO2S (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) SENSOR 2) Detects secondary HO2S (sensor 2) signal With throttle fully opened from idle and warmed up engine*. above 0.8 V While throttle quickly closed: below 0.1 V
38 BLK/WHT 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 While driving. about 2.5 V (pulses)
40 BRN LSB (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE B) Drives A/T clutch pressure control solenoid valve B With ignition switch ON (II) current controlled
45 WHT/GRN ALTC (ALTERNATOR CONTROL) Sends alternator control signal With warmed up engine running: about 7.5 V (depending on electrical load)
46 WHT/BLU ALTL (ALTERNATOR L SIGNAL) Detects alternator L signal With ignition switch ON (II). about 0 V With engine running. battery voltage
47 WHT/RED ALTF (ALTERNATOR FR SIGNAL) Detects alternator FR signal With engine running. about 0.5-2.7 V (depending on electrical load)
48 RED/BLK LSA (A/T CLUTCH PRESSURE CONTROL SOLENOID VALVE A) Drives A/T clutch pressure control solenoid valve A With ignition switch ON (II): current controlled