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Home >> Acura >> 2007 >> TL Base >> Repair and Diagnosis (Single Page) >> Engine Mechanical >> Auxiliary Emission Control Systems >> Fuel And Emissions Systems >> System Description >> ECM/PCM Inputs and Outputs at Connector B (24P)
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ECM/PCM Inputs and Outputs at Connector B (24P)

Fig 1: Identifying ECM/PCM Inputs And Outputs At Connector B (24P) Terminals
G05457881Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE: Standard battery voltage is about 12 V.
TERMINALS REFERENCE CHART

Terminal number Wire color Terminal name Description Signal
1 BLU/RED CKPB (CRANKSHAFT POSITION (CKP) SENSOR B) Drives CKP sensor B signal With engine running: pulses
2 RED/YEL 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
3 WHT/RED IMT- (INTAKE MANIFOLD TUNING (IMT) ACTUATOR - SIDE) Ground for IMT actuator With ignition switch ON (II): battery voltage
4 WHT/BLU IMT+ (INTAKE MANIFOLD TUNING (IMT) ACTUATOR +SIDE) Drives IMT actuator With ignition switch ON (II): battery voltage
5 BLU/RED EGR (EXHAUST GAS RECIRCULATION(EGR) VALVE) Drives EGR valve With EGR operating: duty controlled
With EGR not operating: about 0 V
6 RED/BLU KS (KNOCK SENSOR) Detects knock sensor signal With engine knocking: pulses
7 BLU/YEL MCS (ENGINE MOUNT CONTROL SOLENOID VALVE) Drives engine mount control solenoid valve At idle: about 0 V
Above idle: battery voltage
8 YEL CMP (CAMSHAFT POSITION (CMP) SENSOR) Detects CMP sensor signal With engine running: pulses
9 GRN SHO2SB1 (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) BANK 1, SENSOR 2) Detects rear secondary HO2S (Bank 1, sensor 2) signal With throttle fully opened from idle with fully warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V
10 GRN FANH (RADIATOR FAN RELAY, FAN CONTROL RELAY HIGH) Drives radiator fan relay and fan control relay With ignition switch ON (II): battery voltage
11 WHT/BLK IMTM (INTAKE MANIFOLD TUNING (IMT) ACTUATOR MONITOR) Detects IMT actuator position With engine running: about 0 V
With engine speed above 4,000 rpm: about 5.0 V


Fig 1: Identifying ECM/PCM Inputs And Outputs At Connector B (24P) Terminals
G05457882Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE: Standard battery voltage is about 12 V.
TERMINALS REFERENCE CHART

Terminal number Wire color Terminal name Description Signal
12 BLU VSB1 (VSCELL+BANK1) Detects rear A/F sensor (Bank 1, sensor DVS CELL signal With engine running: about 3.4-4.8 V
13 RED VCENTB1 (VIRTUAL GROUND BANK 1) Reference voltage supply for rear A/F sensor (Bank 1, sensor 1) With fully warmed up engine at idle: about 3.4-3.8 V
14 GRN IPB1 (IPCELL+BANK1) Detects rear A/F sensor (Bank 1, sensor 1) pump cell With engine running: about 2.0-5.6 V
15 BRN/YEL LG2 (LOGIC GROUND) Ground circuit for ECM/PCM Less than 1.0 Vat all times
17 BLU CKPA (CRANKSHAFT POSITION (CKP) SENSOR A) Detects CKP sensor A signal With engine running: pulses
18 WHT SHO2SB2 (SECONDARY HEATED OXYGEN SENSOR (SECONDARY HO2S) BANK 2, SENSOR 2) Detects front secondary HO2S (Bank 2, sensor 2) signal With throttle fully opened from idle with fully warmed up engine: above 0.6 V
With throttle quickly closed: below 0.4 V
19 BLU NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR) Detects output shaft (countershaft) speed sensor signals With ignition switch ON (II) and front wheels rotated by hand: pulses
20 RED/BLU VSB2 (VSCELL+BANK2) Reference voltage supply for front A/F sensor (Bank 2, sensor 1) With fully warmed up engine at idle: about 3.4-4.8 V
21 RED/WHT VCENTB2 (VIRTUAL GROUND BANK 2) Detects front A/F sensor (Bank 2, sensor DVS CELL signal With engine running with fully warmed up engine: about 3.4-4.8 V
22 GRN/RED IPB2 (IPCELL+BANK2) Detects front A/F sensor (Bank 2, sensor 1) pump cell With engine running: about 2.0-5.6 V
23(1) RED/BLK ATPN (TRANSMISSION RANGE SWITCH N) Detects transmission range switch N position signal In N position: about 0 V
In any position other than N: battery voltage
24 GRN/RED ECT2 (ENGINE COOLANT TEMPERATURE (ECT) SENSOR 2) Detects ECT sensor 2 signal With ignition switch ON (II): about 0.1-4.8V (depending on engine coolant temperature)
(1) A/T