2006 ACURA CSX engine oil

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ECM/PCM Electrical Connections
11-16Fuel and Emissions Systems
System Description (cont’d)
IGNITION
SWITCH
IG1
ST B
IG2
IG1 HOT in ON (II)
and START (III) IGNITION COIL
RELAY
ELD PGM-FI MAIN
RELAY 2 (FUEL PUMP)P
FUEL PUMP
PGM-FI MAIN
RELAY 1
BATTERY A/C CONDENSER
FAN RELAYRADIATOR
FAN RELAY
A/C COMPRESSOR
CLUTCH RELAY
To
COOLING
FAN CONTROL
RELAY E
A8 IGPC36 IG1
A14 ACC
A5 FANH A23 ELD
A4 FANL GF
C
B
D
A
PG1 B36PG2 B1
MRLY A6
IMOFPR A15
SUBRLY A21
ETCSRLY A20 STARTER CUT
RELAY (ST CUT)
PGMETCS C2 PGM-FI
SUBRELAY
ETCS CONTROL
RELAY
I
IG1ETCS C1
ECM/PCM
CLUTCH
INTERLOCK
SWITCH
H
J*2
*1
T
*3
*1: A/T
*2: M/T
*3: K20Z3 engine
UNDER-HOOD
FUSE/RELAY BOX:
No. 1 MAIN FUSE (100 A)
No.19FIMAIN(15A)
No. 2 IG MAIN (50 A)
No. 23 BACK UP (10 A)
No. 12 STOP & HORN
(15 A) No. 18 IG COIL (15 A)
UNDER-DASH
FUSE/RELAY BOX: No. 3 ALTERNATOR
(10 A) No. 2 FUEL PUMP (15 A)
No. 36 IG2 HAC (A/C)
(10 A)
UNDER-HOOD
FUSE/RELAY BOX: No.15OILLVL(7.5A)
No. 11 FI SUB (15 A)
No. 21 DBW (THROTTLE
ACTUATOR CONTROL) (15 A)
08/08/21 14:12:37 61SNR030_110_0016
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11-19
A42 WEN
A31 SCS OIL PRESSURE
SWITCH
B
BRAKE PEDAL
POSITION SWITCH
BKSW A40
BKSWNC A39 H
VSSOUT A29 To
MOONROOF
CONTROL UNIT/MOTOR,
AUDIO UNIT
A37 CANL
FTP SENSOR
A19 VCC6
A26 FTP
A9 SG6
A36 CANH
E OPSW B7
Q
R
P
CRMTCLS A41 CLUTCH PEDAL
POSITION SWITCH
S
THROTTLE
ACTUATOR
THROTTLE BODY C12 VCC3
C20 TPSA
C21 TPSB
C39 SG3
C4 ETCSM
C3 ETCSM ECT SENSOR 2
R
S
A/C PRESSURE
SENSOR *2
VCC4 A25 APSA A17 SG4 A35
VCC5 A24
APSB A18 SG5 A34
ETC2 A33
ACPD A16
To MICU *3
T
RVS A27
GAUGE CONTROL MODULE (TACH)
B A
REVERSE LOCKOUT
SOLENOID
TP SENSOR A/B A
DATA LINK
CONNECTOR
B APP SENSOR A/B
*2: M/T
*3: K20Z3 engine
(cont’d)
08/08/21 14:12:39 61SNR030_110_0019
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ECM/PCM Inputs and Outputs at Connector B ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-28Fuel and Emissions Systems
System Description (cont’d)
NOTE: Standard battery voltage is about 12 V.




1BLK/RED
(BLK) PG2 (POWER GROUND) Ground circuit for ECM/
PCMLess than 1.0 V at all times
2 BLU/RED EGR (EXHAUST GAS RECIRCULATION (EGR)
VALVE) Drives EGR valve With EGR operating: duty controlled
With EGR not operating: about 0 V
3 YEL/BLU PCS (EVAPORATIVE EMISSION (EVAP)
CANISTER PURGE VALVE) Drives EVAP canister purge
valve
With engine running, engine coolant below 60 °C
(140 °F): battery voltage
With engine running, engine coolant above 60 °C
(140 °F): duty controlled
4 BLK/WHT SO2SHTC (SECONDARY HEATED OXYGEN SENSOR
(SECONDARY HO2S)
HEATER (SENSOR 2)) Drives secondary HO2S
heater (sensor 2)
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
signalWith ignition switch OFF: about 0 V
With engine running: battery voltage
8 BLU/RED OP2SW (2ND CLUTCH TRANSMISSION FLUID
PRESSURE SWITCH) Detects 2nd clutch
transmission fluid pressure
switch inputWith ignition switch ON (II):
Without 2nd clutch pressure: about 5.0 V
With 2nd clutch pressure: about 0 V
9 BLU/WHT OP3SW (3RD CLUTCH TRANSMISSION FLUID
PRESSURE SWITCH) Detects 3rd clutch
transmission fluid pressure
switch inputWith ignition switch ON (II):
Without 3rd clutch pressure: about 5.0 V
With 3rd clutch pressure: about 0 V
10 BLU/BLK SHA (SHIFT SOLENOID VALVE A) Drives shift solenoid
valve AWith engine running in R, D, and S (in 1st, 4th, or
5th gears): battery voltage
With engine running in P, N, D, and S (in 2nd and
3rd gears): about 0 V
11 GRN/WHT SHB (SHIFT SOLENOID VALVE B) Drives shift solenoid
valve BWith engine running in P, R, N, D, and S (in 1st and
2nd gears): battery voltage
With engine running in D and S (in 3rd, 4th, 5th
gears): about 0 V
12 RED/BLK ATPN (TRANSMISSION RANGE SWITCH N) Detects transmission range
switch N position signal
inputIn N: about 0 V
In any position other than N: about 5.0 V
13 BLU/BLK ATPP (TRANSMISSION RANGE SWITCH P) Detects transmission range
switch P position signal
inputIn P: about 0 V
In any position other than P: about 5.0 V
14 WHT ATPR (TRANSMISSION RANGE SWITCH R) Detects transmission range
switch R position signal
inputIn R: about 0 V
In any position other than R: about 5.0 V
15 RED ATPS (TRANSMISSION RANGE SWITCH S) Detects transmission range
switch S position signal
inputIn S: about 0 V
In any position other than S: battery voltage
1: A/T
4: K20Z2 engine
5: ’07-09 models
5
4
1
1
1
1
1
1
1
1
Terminal side of female terminals
08/08/21 14:12:43 61SNR030_110_0028
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ECM/PCM Inputs and Outputs at Connector B ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-30Fuel and Emissions Systems
System Description (cont’d)
NOTE: Standard battery voltage is about 12 V.


30 RED/BLK VG (MASS AIR FLOW
(MAF) SENSOR SIDE) Detects MAF sensor signal At idle: about 1.1 1.6 V
(between VG terminal and VG terminal)
31 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)
32 BLK/BLU VG (MASS AIR FLOW (MAF) SENSOR SIDE) Ground for MAF sensor
signal
33 GRN/BLK SG2 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
34 GRN/YEL VTS (ROCKER ARM OIL CONTROL SOLENOID) Drives rocker arm oil
control solenoidAt idle: about 0 V
35 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
36 BLK PG1 (POWER GROUND) Ground circuit for ECM/ PCMLess than 1.0 V at all times
40 BRN SDNP (PADDLE SHIFTER (DOWN SHIFT SWITCH)) Detects paddle shifter
(downshift switch) signalIn S:
With paddle shifter (downshift switch) pressed:
about 0 V
With paddle shifter (downshift switch) released:
about 5.0 V
41 WHT/GRN ALTC (ALTERNATOR CONTROL) Sends alternator control
signalWith warmed up engine running: about 5.0 V
(depending on electrical load)
42 WHT/BLU ALTL (ALTERNATOR L SIGNAL) Detects alternator L signal With ignition switch ON (II): about 0 V
With engine running: battery voltage
43 WHT/RED ALTF (ALTERNATOR FR SIGNAL) Detects alternator FR signal With engine running: about 2.6 3.4 V
(depending on electrical load)
44 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
1: A/T
1
1
1
Terminal side of female terminals
08/08/21 14:12:44 61SNR030_110_0030
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ECM/PCM Inputs and Outputs at Connector C ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-31
NOTE: Standard battery voltage is about 12 V.
1 WHT IG1ETCS (IGNITION SIGNAL ETCS) Detects ignition signal With ignition switch ON (II): battery voltage
2 BLK PGMETCS (POWER GROUND ETCS) Ground circuit for ECM/
PCMLess than 1.0 V at all times
3 GRN/YEL ETCSM (THROTTLE ACTUATOR SIDE) Ground for throttle actuator With ignition switch ON (II): about 0 V
4 BLU/RED ETCSM (THROTTLE ACTUATOR SIDE) Drives throttle actuator With ignition switch ON (II): about 0 V
5 BRN INJ1 (No. 1 INJECTOR) Drives No. 1 injector At idle: duty controlled With ignition switch ON (II): battery voltage
6 RED INJ2 (No. 2 INJECTOR) Drives No. 2 injector
7 BLU INJ3 (No. 3 INJECTOR) Drives No. 3 injector
8 YEL INJ4 (No. 4 INJECTOR) Drives No. 4 injector
9 WHT/GRN AFSHTC (AIR FUEL RATIO
(A/F) SENSOR HEATER
CONTROL (SENSOR 1)) Drives A/F sensor heater
(sensor 1)
With ignition switch ON (II): battery voltage
With fully warmed up engine running: about 0 V
11 GRN/RED MAP (MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR) Detects MAP sensor signal With ignition switch ON (II): about 3.0 V
At idle: about 1.0 V (depending on engine speed)
12 BLU VCC3 (SENSOR VOLTAGE) Provides sensor reference voltageWith ignition switch ON (II): about 5.0 V
13 YEL/RED VCC1 (SENSOR VOLTAGE) Provides sensor reference voltageWith ignition switch ON (II): about 5.0 V
14 GRN/WHT SG1 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
15 YEL/GRN IGPLS1 (No. 1 IGNITION COIL PULSE) Drives No. 1 ignition coil With ignition switch ON (II): about 0 V
With engine running: pulses
16 BLU/RED IGPLS2 (No. 2 IGNITION COIL PULSE) Drives No. 2 ignition coil
17 WHT/BLU IGPLS3 (No. 3 IGNITION COIL PULSE) Drives No. 3 ignition coil
18 BRN IGPLS4 (No. 4 IGNITION COIL PULSE) Drives No. 4 ignition coil
20 RED/BLK TPSA (THROTTLE POSITION (TP) SENSOR A) Detects TP sensor A signal With throttle fully open: about 3.9 V
With throttle fully closed: about 0.9 V
21 RED/BLU TPSB (THROTTLE POSITION (TP) SENSOR B) Detects TP sensor B signal With throttle fully open: about 4.1 V
With throttle fully closed: about 1.7 V
(cont’d)
Terminal side of female terminals
08/08/21 14:13:36 61SNR030_110_0031
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ECM/PCM Inputs and Outputs at Connector C ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-32Fuel and Emissions Systems
System Description (cont’d)
NOTE: Standard battery voltage is about 12 V.
22 BLU/BLK VTPSW (ROCKER ARM OIL PRESSURE SWITCH) Detects rocker arm oil
pressure switch signalWith engine at low speed: about 0 V
With engine at high speed: battery voltage
23 BLU/WHT VTC (VTC OIL CONTROL SOLENOID VALVE) Drives VTC oil control
solenoid valvewith ignition switch ON (II): about 0 V
27 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: about 0.6 V
With throttle quickly closed: below 0.4 V
29 RED AFS (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1)SIDE) Detects A/F sensor
(sensor 1) signal
30 RED/YEL AFS (AIR FUEL RATIO (A/F) SENSOR (SENSOR 1)SIDE) Detects A/F sensor
(sensor 1) signal
31 GRN CMPB (CAMSHAFT POSITION (CMP) SENSOR
B) Detects CMP sensor B
signal
With engine running: pulses
32 BLU/YEL CKP (CRANKSHAFT POSITION (CKP) SENSOR) Detects CKP sensor signal With engine running: pulses
36 BLK/GRN IG1 (IGNITION SIGNAL) Detects ignition signal With ignition switch ON (II): battery voltage
39 GRN SG3 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
40 BRN/YEL LG1 (LOGIC GROUND) Ground circuit for ECM/ PCMLess than 1.0 V at all times
41 BLU/WHT CMPA (CAMSHAFT POSITION (CMP) SENSOR
A) Detects CMP sensor A
signal
With engine running: pulses
42 RED/BLU KS (KNOCK SENSOR) Detects knock sensor signal With engine knocking: pulses
43 BLK/WHT NC (OUTPUT SHAFT (COUNTERSHAFT) SPEED
SENSOR) Detects output shaft
(countershaft) speed sensor
signalsWith ignition switch ON (II): pulses
With vehicle moving: about 5.0 V (pulses)
44 BRN/YEL LG2 (LOGIC GROUND) Ground circuit for ECM/ PCMLess than 1.0 V at all times
Terminal side of female terminals
08/08/21 14:13:36 61SNR030_110_0032
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i-VTEC
11-37
LOW SPEED CAMHIGH SPEED CAM
HIGH
ENGINE SPEED HIGH
LOW
LOW
ENGINE
LOAD
TORQUE CURVE
 The i-VTEC system has a variable valve timing control (VTC) mechanism on the intake camshaft in addition to the
usual VTEC.
This system improves fuel efficiency and reduces exhaust emissions at all levels of engine speed, vehicle speed,
and engine load.
 The VTEC system changes the valve lift and timing by using more than one cam profile.
 The VTC system changes the phase of the intake camshaft via oil pressure. It changes the intake valve timing continuously.
Driving Condition VTC Control Description
Light-load Base Position For stable combustion, the cam angle is retarded, and reduces the entry of exhaust gas into the cylinder.
Medium/high-load Advance Control Cam phase angle is controlled to optimize valve timing, improving fuel efficiency and reducing
emissions.
High speed Advance-Base Position To reduce pumping loss, the intake valve is closed quickly. This gives the air/fuel mixture a charging
effect that helps to maximize engine power.
(cont’d)
08/08/21 14:13:39 61SNR030_110_0037
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Exhaust Gas Recirculation (EGR) System
(K20Z2 engine)
Evaporative Emission (EVAP) Control
System
EGR Valve
EVAP Canister
EVAP Canister Purge Valve
Fuel Tank Pressure (FTP) Sensor
EVAP Canister Vent Shut Valve
11-41
TERMINAL
COIL
OUT
IN O-RING
TERMINAL
SENSOR UNIT
O-RING VALVE O-RING TERMINAL
Refer to the system diagram to see a functional layout
of the system.
The EGR valve lowers peak combustion temperatures
and reduces oxides of nitrogen emissions (NOx) by
recirculating exhaust gas through the intake manifold
and into the combustion chambers.
Refer to the system diagram to see a functional layout
of the system.
The EVAP canister temporarily stores fuel vapor from
the fuel tank until it can be purged back into the engine
and burned.
When the engine coolant temperature is below 60 °C
(140 °F), the ECM/PCM turns off the EVAP canister
purge valve which cuts vacuum to the EVAP canister. The FTP sensor converts fuel tank absolute pressure
into an electrical input to the ECM/PCM.
The EVAP canister vent shut valve is on the EVAP
canister.
The EVAP canister vent shut valve controls the venting
of the EVAP canister.
(cont’d)
08/08/21 14:13:42 61SNR030_110_0041
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