Acura CSX. Manual — part 87
06
K20Z3 engine
11-22
Fuel and Emissions Systems
EVAPORATIVE EMISSION
(EVAP) CANISTER PURGE VALVE
To
EVAPORATIVE
EMISSION (EVAP)
CANISTER
INTAKE AIR
BYPASS CONTROL
THERMAL VALVE
FRONT OF
VEHICLE
08/08/21 14:12:40 61SNR030_110_0022
*04
Vacuum Distribution
K20Z2 engine
11-23
3
ENGINE
COOLANT
9
5
18
4
6
7
8
20
19
2
26
16
15
25
11
13
14
10
21
23
12
ATMOSPHERE
1
ENGINE
COOLANT
24
17
ATMOSPHERE
22
MASS AIR FLOW (MAF) SENSOR/
INTAKE AIR TEMPERATURE (IAT) SENSOR
AIR FUEL RATIO (A/F) SENSOR (SENSOR 1)
SECONDARY HEATED OXYGEN SENSOR
(SECONDARY HO2S) (SENSOR 2)
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1
CRANKSHAFT POSITION (CKP) SENSOR
KNOCK SENSOR
CAMSHAFT POSITION (CMP) SENSOR B
CAMSHAFT POSITION (CMP) SENSOR A
THROTTLE BODY
INJECTOR
FUEL PRESSURE REGULATOR
FUEL FILTER
FUEL PUMP
FUEL TANK
INTAKE AIR RESONATOR
POSITIVE CRANKCASE VENTILATION (PCV) VALVE
THREE WAY CATALYTIC CONVERTER
EVAPORATIVE EMISSION (EVAP) CANISTER
EVAPORATIVE EMISSION (EVAP) CANISTER
PURGE VALVE
EVAPORATIVE EMISSION (EVAP) CANISTER
VENT SHUT VALVE
FUEL TANK PRESSURE (FTP) SENSOR
INTAKE AIR BYPASS CONTROL THERMAL VALVE
FUEL TANK VAPOR CONTROL VALVE
AIR CLEANER
EXHAUST GAS RECIRCULATION (EGR) VALVE and
POSITION SENSOR
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*05
K20Z3 engine
11-24
Fuel and Emissions Systems
3
ENGINE
COOLANT
9
5
17
4
6
7
8
19
18
2
25
16
15
24
11
13
14
10
20
22
12
ATMOSPHERE
1
ENGINE
COOLANT
23
ATMOSPHERE
21
MASS AIR FLOW (MAF) SENSOR/
INTAKE AIR TEMPERATURE (IAT) SENSOR
AIR FUEL RATIO (A/F) SENSOR (SENSOR 1)
SECONDARY HEATED OXYGEN SENSOR
(SECONDARY HO2S) (SENSOR 2)
MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
ENGINE COOLANT TEMPERATURE (ECT) SENSOR 1
CRANKSHAFT POSITION (CKP) SENSOR
KNOCK SENSOR
CAMSHAFT POSITION (CMP) SENSOR B
CAMSHAFT POSITION (CMP) SENSOR A
THROTTLE BODY
INJECTOR
FUEL PRESSURE REGULATOR
FUEL FILTER
FUEL PUMP
FUEL TANK
INTAKE AIR RESONATOR
POSITIVE CRANKCASE VENTILATION (PCV) VALVE
THREE WAY CATALYTIC CONVERTER
EVAPORATIVE EMISSION (EVAP) CANISTER
EVAPORATIVE EMISSION (EVAP) CANISTER
PURGE VALVE
EVAPORATIVE EMISSION (EVAP) CANISTER
VENT SHUT VALVE
FUEL TANK PRESSURE (FTP) SENSOR
INTAKE AIR BYPASS CONTROL THERMAL VALVE
FUEL TANK VAPOR CONTROL VALVE
AIR CLEANER
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−
−
05
□
ECM/PCM Inputs and Outputs at Connector A (
) (44P)
Terminal
number
Wire color
Terminal name
Description
Signal
11-25
NOTE: Standard battery voltage is about 12 V.
4
PUR
FANL (RADIATOR FAN
CONTROL)
Drives radiator fan relay
With radiator fan running: about 0 V
With radiator fan stopped: battery voltage
5
GRY
FANH (RADIATOR FAN
CONTROL)
Drives A/C condenser fan
relay
With A/C condenser fan running: about 0 V
With A/C condenser fan stopped: battery voltage
6
GRN
MRLY (PGM-FI MAIN
RELAY 1)
Drives PGM-FI main relay 1
Power source for DTC
memory
With ignition switch ON (II): about 0 V
With ignition switch OFF: battery voltage
8
ORN
IGP (POWER SOURCE)
Power source for ECM/PCM
circuit
With ignition switch ON (II): battery voltage
9
BLK
SG6 (SENSOR GROUND)
Sensor ground
Less than 1.0 V at all times
10
LT GRN
VSV (EVAPORATIVE
EMISSION (EVAP)
CANISTER VENT SHUT
VALVE)
Drives EVAP canister vent
shut valve
With ignition switch ON (II): battery voltage
14
RED
ACC (A/C COMPRESSOR
CLUTCH RELAY)
Drives A/C compressor
clutch relay
With compressor ON: about 0 V
With compressor OFF: battery voltage
15
BRN
IMOFPR (IMMOBILIZER
FUEL PUMP RELAY)
Drives PGM-FI main relay 2
(FUEL PUMP)
About 0 V for 2 seconds after turning ignition switch
ON (II), then battery voltage
16
LT GRN
ACPD (A/C PRESSURE
SENSOR)
Detects A/C pressure
sensor signal
With A/C switch ON: about 1.7
4.8 V
(depending on A/C pressure)
17
YEL
APSA (ACCELERATOR
PEDAL POSITION (APP)
SENSOR A)
Detects APP sensor A signal
With ignition switch ON (II) and accelerator pedal
pressed: about 4.7 V
With ignition switch ON (II) and accelerator pedal
released: about 0.5 V
18
PUR
APSB (ACCELERATOR
PEDAL POSITION (APP)
SENSOR B)
Detects APP sensor B signal
With ignition switch ON (II) and accelerator pedal
pressed: about 2.3 V
With ignition switch ON (II) and accelerator pedal
released: about 0.25 V
19
RED
VCC6 (SENSOR VOLTAGE)
Provides sensor reference
voltage
With ignition switch ON (II): about 5.0 V
20
YEL
ETCSRLY (ELECTRONIC
THROTTLE CONTROL
SYSTEM (ETCS) CONTROL
RELAY)
Drives electronic throttle
control system (ETCS)
control relay
With ignition switch ON (II): about 0 V
(4.0 V momentarily)
21
PNK
SUBRLY (PGM-FI
SUBRELAY)
Drives PGM-FI subrelay
With ignition switch ON (II): about 0 V
23
ORN
ELD (ELECTRICAL LOAD
DETECTOR (ELD))
Detects ELD signal
With ignition switch ON (II): about 0.1
4.8 V
(depending on electrical load)
Terminal side of female terminals
08/08/21 14:12:42 61SNR030_110_0025
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