2006 ACURA CSX brake




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9-11
Exhaust Manifold Removal and Installation
A B
A
B
1. Relieve the fuel pressure (see page 11-322).
2. Loosen the drain plug in the radiator, and drain the
engine coolant (see page 10-8).
3. Remove the under-cowl panel (see step 4 on page 20-164).
4. Disconnect the evaporative emission (EVAP) canister hose (A) and the brake booster vacuum
hose (B).
5. Remove the quick-connect fitting cover (A), then disconnect the fuel feed hose (B) (see page 11-329). 6. Disconnect the heater hoses.
7. Remove the rocker arm oil control valve (see page
11-296).
8. Remove the intermediate shaft heat shield (see step 3 on page 16-23).
(cont’d)
08/08/21 14:37:37 61SNR030_090_0011
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DYNOMITE -2009-

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Fuel and Emissions
Fuel and Emissions Systems
PGM-FI System
Electronic Throttle Control System
VTEC/VTC
Idle Control SystemFuel Supply System
Intake Air System
Catalytic Converter System
EGR System
PCV System
EVAP System..................................................
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Special Tools . 11-2
General Troubleshooting Information . 11-3
DTC Troubleshooting Index . 11-9
Symptom Troubleshooting Index . 11-13
System Description . 11-15
How to Set Readiness Codes . 11-69
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Component Location Index . 11-72
DTC Troubleshooting . 11-74
F-CAN Circuit Troubleshooting . 11-191
MIL Circuit Troubleshooting . 11-203
DLC Circuit Troubleshooting . 11-204
Injector Replacement . 11-219
A/F Sensor Replacement . 11-221
Secondary HO2S Replacement . 11-221
CMP Sensor B Replacement . 11-222
CKP Sensor Replacement . 11-222
Output Shaft (Countershaft) Speed Sensor
Replacement . 11-223
Knock Sensor Replacement . 11-223
MAP Sensor Replacement . 11-224
MAF Sensor/IAT Sensor Replacement . 11-224
ECT Sensor 1 Replacement . 11-225
ECT Sensor 2 Replacement . 11-225
ELD Replacement . 11-226
ECM/PCM Update . 11-227
ECM/PCM Replacement . 11-228
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Component Location Index . 11-231
DTC Troubleshooting . 11-232
APP Sensor Signal Inspection . 11-268
Accelerator Pedal Module
Removal/Installation . 11-269
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Component Location Index
. 11-273
DTC Troubleshooting . 11-274
VTC Oil Control Solenoid Valve Removal/Test/Installation . 11-294
CMP Sensor A Replacement . 11-295
Rocker Arm Oil Control Valve Removal/Installation . 11-296
Rocker Arm Oil Pressure Switch Removal/Installation . 11-296
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Component Location Index
. 11-297
DTC Troubleshooting . 11-298
A/C Signal Circuit Troubleshooting . 11-306
Alternator FR Signal Circuit Troubleshooting . 11-307
Brake Pedal Position Switch Signal Circuit Troubleshooting . 11-308
Idle Speed Inspection . 11-309
ECM/PCM Idle Learn Procedure . 11-310 ..........................
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Component Location Index
. 11-311
DTC Troubleshooting . 11-313
Fuel Pump Circuit Troubleshooting . 11-318
Fuel Pressure Relieving . 11-322
Fuel Pressure Test . 11-325
Fuel Tank Draining . 11-325
Fuel Line Inspection . 11-326
Fuel Line/Quick-Connect Fitting Precautions . 11-328
Fuel Line/Quick-Connect Fitting Removal . 11-329
Fuel Line/Quick-Connect Fitting Installation . 11-331
Fuel Tank Unit Removal and Installation . 11-334
Fuel Pressure Regulator Replacement . 11-337
Fuel Filter Replacement . 11-337
Fuel Pump/Fuel Gauge Sending Unit Replacement . 11-338
Fuel Tank Replacement . 11-339
Fuel Gauge Sending Unit Test . 11-340
Low Fuel Indicator Test . 11-341
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Component Location Index
. 11-342
Throttle Body Test . 11-343
Throttle Body Cleaning . 11-344
Intake Air Bypass Control Thermal Valve Test . 11-344
Air Cleaner Removal/Installation . 11-345
Air Cleaner Element Inspection/Replacement . 11-346
Intake Air Resonator Removal/Installation . 11-346
Throttle Body Removal/Installation . 11-348
Throttle Body Disassembly/Reassembly . 11-350
Intake Air Bypass Control Thermal Valve Replacement . 11-351
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Component Location Index
. 11-352
DTC Troubleshooting . 11-353
Catalytic Converter Removal/Installation . 11-355
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Component Location Index
. 11-356
DTC Troubleshooting . 11-357
EGR Valve Replacement . 11-370
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Component Location Index
. 11-371
PCV Valve Inspection . 11-372
PCV Valve Replacement . 11-373
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Component Location Index
. 11-374
DTC Troubleshooting . 11-375
Fuel Cap Warning Message System Troubleshooting . 11-405
EVAP Canister Replacement . 11-407
FTP Sensor Replacement . 11-408
EVAP Canister Vent Shut Valve Replacement . 11-409
EVAP Canister Purge Valve Replacement . 11-409
08/08/21 14:12:30 61SNR030_110_0001
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DYNOMITE -2009-

SymptomDiagnostic procedure Also check for
11-14Fuel and Emissions Systems
Symptom Troubleshooting Index (cont’d)










Low power
(MIL works OK, no DTCs set)
Check the fuel pressure (see page 11-325). Low compression
Incorrect camshaft
timing
Incorrect engine oil
level
Exhaust restriction
Engine stalls
(MIL works OK, no DTCs set) 1.
2.
3.
4.DotheECM/PCMidlelearnprocedure(seepage
11-310).
Check the fuel pressure (see page 11-325).
Check the idle speed (see page 11-309).
Troubleshoot the brake pedal position switch signal
circuit (see page 11-308). Intake air leaks
Faulty harness and
sensor
connections
Fuel contamination
Difficult to refuel
(MIL works OK, no DTCs set) 1.
2.
3.Check the fuel vent tube between the EVAP canister
and the fuel tank.
Check the fuel tank vapor recirculation tube between
thefuelpipeandthefueltank.
Replace the fuel tank (see page 11-339). Malfunctioning gas
station filling
nozzle.
Filler neck
restriction
Faulty fuel tank
vapor control valve
Fuel overflows during
refueling
(No DTCs set) Replace the fuel tank (see page 11-339). Malfunctioning gas
station filling nozzle.
HDS does not communicate
with the ECM/PCM or the
vehicle Troubleshoot the DLC circuit (see page 11-204).
Fuel cap warning message
stays on
(MIL works OK, no DTCs set)
(K20Z3 engine) Troubleshoot the fuel cap warning message system
(see page 11-405).
08/08/21 14:12:36 61SNR030_110_0014
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Î
´µ
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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DYNOMITE -2009-

µ
Ø
ECM/PCM Inputs and Outputs at Connector A ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-26Fuel and Emissions Systems
System Description (cont’d)
NOTE: Standard battery voltage is about 12 V.
24 GRY VCC5 (SENSOR VOLTAGE) Provides sensor reference voltageWith ignition switch ON (II): about 5.0 V
25 BRN VCC4 (SENSOR VOLTAGE) Provides sensor reference voltageWith ignition switch ON (II): about 5.0 V
26 LT GRN FTP (FUEL TANK PRESSURE (FTP) SENSOR) Detects FTP sensor signal With ignition switch ON (II) and fuel fill cap
removed: about 2.5 V
27 PNK SLS (SHIFT LOCK SOLENOID) Drives shift lock solenoid With ignition switch ON (II), in P, brake pedal
pressed, and accelerator released:
battery voltage
27 GRN RVS (REVERSE LOCKOUT SOLENOID) Drives reverse lockout
solenoidWith vehicle speed below 9 mph (15 km/h):
battery voltage
With vehicle speed above 13 mph (20 km/h):
about 0 V
28 BLU NEP (ENGINE SPEED PULSE) Outputs engine speed pulse With engine running: pulses
29 BLU VSSOUT (VEHICLE SPEED SIGNAL OUTPUT) Sends vehicle speed signal Depending on vehicle speed: pulses
31 BRN SCS (SERVICE CHECK SIGNAL) Detects service check signal With service check signal shorted using HDS:
about 0 V
With service check signal opened: about 5.0 V
33 GRN ECT2 (ENGINE COOLANT TEMPERATURE (ECT)
SENSOR 2) Detects ECT sensor 2 signal With ignition switch ON (II): about 0.1 4.8 V
(depending on engine coolant temperature)
34 LT BLU SG5 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
35 BLU SG4 (SENSOR GROUND) Sensor ground Less than 1.0 V at all times
36 WHT CANH (CAN COMMUNICATION SIGNAL
HIGH) Sends communication
signal
With ignition switch ON (II): about 2.5 V (pulses)
37 RED CANL (CAN COMMUNICATION SIGNAL
LOW) Sends communication
signal
With ignition switch ON (II): about 2.5 V (pulses)
1: A/T
3: K20Z3 engine
1
3
Terminal side of female terminals
08/08/21 14:12:43 61SNR030_110_0026
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DYNOMITE -2009-

Ø
ECM/PCM Inputs and Outputs at Connector A ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
11-27
NOTE: Standard battery voltage is about 12 V.
39 BRN BKSWNC (BRAKE PEDAL POSITION SWITCH) Detects brake pedal
position switch signalWith ignition switch ON (II) and brake pedal
released: battery voltage
With ignition switch ON (II) and brake pedal
pressed: about 0 V
40 LT GRN BKSW (BRAKE PEDAL POSITION SWITCH) Detects brake pedal
position switch signalWith brake pedal released: about 0 V
With brake pedal pressed: battery voltage
41 LT BLU CRMTCLS (CRUISE CLUTCH PEDAL POSITION
SIGNAL) Detects clutch pedal
position switch signal
With ignition switch ON (II) and clutch pedal
released: about 0 V
With ignition switch ON (II) and clutch pedal
pressed: battery voltage
42 RED WEN (WRITE ENABLE SIGNAL) Detects write enable signal With ignition switch ON (II): about 0 V
44 PNK S-NET5V (SERIAL COMMUNICATION FOR
IMMOBILIZER) Sends serial
communication signal
With ignition switch ON (II): pulses
With ignition switch OFF: about 5.0 V
2: M/T
(cont’d)
2
Terminal side of female terminals
08/08/21 14:12:43 61SNR030_110_0027
ProCarManuals.com
DYNOMITE -2009-

Throttle Body
Brake Pedal Position Switch
Electrical Power Steering (EPS) Signal
Fuel Cutoff Control
Fuel Pump Control
PGM-FI Main Relay 1 and 2
Idle Control System
Fuel Supply System
11-36Fuel and Emissions Systems
System Description (cont’d)
THROTTLE VALVE
THROTTLE POSITION
(TP) SENSOR and
THROTTLE ACTUATOR
The throttle body is a single-barrel side draft type. The
lower portion of the throttle valve is heated by engine
coolant from the cylinder head to prevent icing of the
throttle plate. When the engine is cold, the A/C compressor is on, the
transmission is in gear, the brake pedal is pressed, the
power steering load is high, or the alternator is
charging, the ECM/PCM sends signal to the throttle
position to maintain the correct idle speed.
The brake pedal position switch signals the ECM/PCM
when the brake pedal is pressed.
The EPS signals the ECM/PCM when the power steering
load is high.
During deceleration with the throttle valve closed,
current to the injectors is cut off to improve fuel
economy at engine speeds over 1,000 rpm. Fuel cutoff
control also occurs when the engine speed exceeds
6,900 rpm (K20Z3: 8,200 rpm), regardless of the
position of the throttle valve, to protect the engine from
over-revving. When the vehicle is st
opped, the ECM/
PCM cuts the fuel at engine speeds over 5,000 rpm
(K20Z3: 7,700 rpm). On a cold engine, fuel cut occurs at
a lower engine speed.
When the ignition switch is turned to ON (II), the ECM/
PCM grounds PGM-FI main relay 2 (FUEL PUMP) which
feeds current to the fuel pump for 2 seconds to
pressurize the fuel system. With the engine running, the
ECM/PCM grounds PGM-FI main relay 2 (FUEL PUMP)
and feeds current to the fuel pump. When the engine is
not running and the ignition is turned to ON (II), the
ECM/PCM cuts ground to PGM-FI main relay 2 (FUEL
PUMP) which cuts current to the fuel pump.
PGM-FI main relay 1 is energized whenever the ignition
switch is ON (II), to supply battery voltage to the ECM/
PCM, power to the injectors, and power for PGM-FI
main relay 2 (FUEL PUMP). PGM-FI main relay 2 (FUEL
PUMP) is energized to supply power to the fuel pump
for 2 seconds when the ignition switch is turned to
ON (II), and when the engine is cranking or running.
08/08/21 14:13:39 61SNR030_110_0036
ProCarManuals.com
DYNOMITE -2009-

Î

´
µ
ECM/PCM Circuit Diagram (K20Z2 engine) (cont’d)
11-48Fuel and Emissions Systems
System Description (cont’d)
1
2
3
BLK/YEL
4
GRN/BLK
5
RED/YEL
B30
VG
RED/BLK
B32
VG BLK/BLU
G
B33
SG2 GRN/BLK
B31
IAT RED/YEL F
N *1
ECT SENSOR 1
B23
ECT1
RED/WHT GRN/BLK
RED/WHT
B36
PG1 BLK
B1
PG2 BLK/RED
(BLK)*4
C2
PGMETCS BLK
G101
3
A39
BKSWNC BRN Brake pedal pressed: closed
Brake pedal released: open
Brake pedal pressed: open
Brake pedal released: closed
4
YEL 1
WHT 2
LT GRN
SU T BRAKE PEDAL
POSITION SWITCH
LT BLU Clutch pedal pressed: open
Clutch pedal released: closed
CLUTCH PEDAL
POSITION SWITCH
A41
CRMTCLS
3 2
G401 BLK
*2 C40
LG1
BRN/YEL
C44
LG2 BRN/YEL
G101D
IJ
H
18
1920 BRN
BRN
BRN/YEL C101
AF
AG
BRN/
YEL BRN/
YEL
21
*4
*3*4 1 2
MAF
SENSOR
IAT
SENSOR
6 5
*1: A/T
*2: M/T
*3: ’06 model
*4: ’07-09 models
08/08/21 14:13:46 61SNR030_110_0048
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DYNOMITE -2009-