2006 ACURA CSX fuel pressure

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DTC
(MIL indication ) Two Drive Cycle
Detection Detection Item MIL Note
11-12Fuel and Emissions Systems
DTC Troubleshooting Index (cont’d)
P2227 (13)
Barometric Pressure (BARO) Sensor Circuit Range/Performance
Problem ON (see page 11-176)
P2228 (13) Barometric Pressure (BARO) Sensor Circuit Low Voltage ON (see page 11-177)
P2229 (13) Barometric Pressure (BARO) Sensor Circuit High Voltage ON (see page 11-177)
P2238 (48) Air Fuel Ratio (A/F) Sensor (Sensor 1) AFS Circuit Low Voltage ON (see page 11-178)
P2252 (48) Air Fuel Ratio (A/F) Sensor (Sensor 1) AFS Circuit Low Voltage ON (see page 11-179)
P2270 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Signal Stuck Lean ON (see page 11-181)
P2271 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Signal Stuck Rich ON (see page 11-181)
P2413 (12) Exhaust Gas Recirculation (EGR) System Malfunction ON (see page 11-363)
P2422 (117) Evaporative Emission (EVAP) Canister Vent Shut Valve Stuck Closed
Malfunction ON (see page 11-402)
P2610 (132) Engine Control Module (ECM)/Powertrain Control Module (PCM)
Ignition Off Internal Timer Malfunction ON (see page 11-182)
P2646 (22) Rocker Arm Oil Pressure Switch Circuit Low Voltage ON (see page 11-284)
P2647 (22) Rocker Arm Oil Pressure Switch Circuit High Voltage ON (see page 11-287)
P2648 (21) Rocker Arm Oil Control Solenoid Circuit Low Voltage ON (see page 11-289)
P2649 (21) Rocker Arm Oil Control Solenoid Circuit High Voltage ON (see page 11-291)
P2A00 (61) Air Fuel Ratio (A/F) Sensor (Sensor 1) Circuit Range/Performance
Problem ON (see page 11-182)
U0028 (126) F-CAN Malfunction (BUS-OFF (Engine Control Module (ECM)/
Powertrain Control Module (PCM))) ON (see page 11-183)
U0122 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Vehicle Stability Assist (VSA) Modulator-
Control Unit) OFF (see page 11-184)
U0131 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Electrical Power Steering (EPS) Control Unit) OFF (see page 11-186)
U0155 (126) F-CAN Malfunction (Engine Control Module (ECM)/Powertrain
Control Module (PCM)-Gauge Control Module) ON (see page 11-188)
U0300 (131) PGM-FI System and A/T System Program Version Mismatch ON (see page 11-190)
NOTE:  The above DTCs are indicated when the PGM-FI system is selected with the HDS.
 Some automatic transmission DTCs cause the MIL to come on. If the MIL is on and no DTCs are indicated in the PGM-FI system, select the A/T system, and check for automatic transmission DTCs.
: These DTCs are indicated by a blinking MIL when the SCS line is jumped with the HDS.
1: A/T
4: K20Z2 engine
6: with VSA
4
6
1
08/08/21 14:12:36 61SNR030_110_0012
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Symptom Diagnostic procedure Also check for
11-13
Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no
DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.












Engine will not start
(MIL works OK, no DTCs set)
1.
2.
3.
4.Test the battery (see page 22-67).
Test the starter (see page 4-9).
Check the fuel pressure (see page 11-325).
Troubleshoot the fuel pump circuit (see page 11-
318).Low compression
No ignition spark
Intake air leaks
Locked up engine
Broken cam chain
Fuel contamination
Engine will not start
(MIL comes on and stays on,
no DTCs set) Troubleshoot the DLC circuit (see page 11-204).
MIL comes on and stays on,
or never comes on at all, no
DTCs set Troubleshoot the MIL circuit (see page 11-203).
Engine will not start
(MIL works OK, no DTCs set,
immobilizer indicator stays
on or flashes) Check the immobilizer system (see page 22-321).
Engine starts but stalls
immediately
(MIL works OK, no DTCs set,
immobilizer indicator stays
on or flashes) Check the immobilizer system (see page 22-323).
Engine is hard to start
(MIL works OK, no DTCs set) 1.
2.
3.Test the battery (see page 22-67).
Check the fuel pressure (see page 11-325).
Clean the throttle body (see page 11-
344).Low compression
Intake air leaks
Fuel contamination
Weak spark
Cold fast idle too low
(MIL works OK, no DTCs set) 1.
2.
3.DotheECM/PCMidlelearnprocedure(seepage
11-310).
Check the idle speed (see page 11-309).
Clean the throttle body (see page 11-
344).
Cold fast idle too high
(MIL works OK, no DTCs set) 1.
2.
3.DotheECM/PCMidlelearnprocedure(seepage
11-310).
Check the idle speed (see page 11-309).
Do the throttle position learning check (see page
11-343). Intake air leaks
Idle speed fluctuates
(MIL works OK, no DTCs set) 1.
2.
3.
4.DotheECM/PCMidlelearnprocedure(seepage
11-310).
Check the idle speed (see page 11-309).
Do the carbon accumulation check (see page 11-343).
Troubleshoot the A/C signal circuit (see page 11-306). Incorrect valve
timing or clearance
adjustment
Intake air leaks
After warming up, idle speed
is below specification without
load
(MIL works OK, no DTCs set) 1.
2.
Troubleshoot the alternator FR signal circuit
(see page 11-307).
Do the carbon accumulation check (see page 11-343). Incorrect valve
timing or clearance
adjustment
After warming up, idle speed
is above specification without
load
(MIL works OK, no DTCs set) 1.
2.
Troubleshoot the alternator FR signal circuit
(see page 11-307).
Inspect the APP sensor (see page 11-268). Intake air leaks
(cont’d)
08/08/21 14:12:36 61SNR030_110_0013
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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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ECM/PCM Electrical Connections (cont’d)
11-18 Fuel and Emissions Systems
System Description (cont’d)
D
C
EVAP CANISTER
PURGE VALVE
EVAP CANISTER
VENT SHUT VALVE
ALTERNATOR
ICM
To
SPARK
PLUG
No. 1 IGNITION COIL
To
SPARK
PLUG ICM
No. 2 IGNITION COIL
To
SPARK
PLUG ICM
No. 3 IGNITION COIL
To
SPARK
PLUG ICM
No. 4 IGNITION COIL A10 VSV B3 PCS
B42 ALTL
B43 ALTF
C15 IGPLS1
C16 IGPLS2
C17 IGPLS3
C18 IGPLS4 B41 ALTC LG1 C40 I
VTS B34 ROCKER ARM
OIL CONTROL
SOLENOID
VTC C23
AFSHTC C9
AFS C29
SHO2S C27
SO2SHTC B4
LG2 C44
AFS C30
SECONDARY
HO2S
(SENSOR 2) A/F SENSOR
(SENSOR 1)
S-NET5V A44 G
CMPA C41 K
Q
CMP SENSOR A
ROCKER ARM
OIL PRESSURE
SWITCH
P
VTPSW C22 VTC OIL CONTROL
SOLENOID VALVE
To MICU
08/08/21 14:12:38 61SNR030_110_0018
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ECM/PCM Electrical Connections (cont’d)
11-20 Fuel and Emissions Systems
System Description (cont’d)
TERMINAL LOCATIONS
*1: A/T
ECM/PCM A ( ) (44P) ECM/PCM C ( ) (44P)
ECM/PCM B ( ) (44P)
ATF TEMPERATURE SENSOR
A/T CLUTCH
PRESSURE
CONTROL
SOLENOID
VALVE A
OUTPUT SHAFT
(COUNTERSHAFT)
SPEED SENSOR
N
INPUT SHAFT
(MAINSHAFT)
SPEED SENSOR
S
A/T CLUTCH
PRESSURE
CONTROL
SOLENOID
VALVE B
A/T CLUTCH
PRESSURE
CONTROL
SOLENOID
VALVE C
TATF B27
SHA B10
SHB B11
SHC B20
SHD B26
LSA B44
NC C43
NM B17
LSB B35
LSC B25 O
M
L
J
To
SHIFT LOCK SOLENOID P
R
N
D S B15 ATPS B21 ATPD
B12 ATPN B14 ATPR B13 ATPP
A27 SLS
3RD CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH
B9 OP3SW
TRANSMISSION
RANGE SWITCH
2ND CLUTCH
TRANSMISSION FLUID
PRESSURE SWITCH B28 ATPFWD
B22 ATPRVS
B8 OP2SW
*1
SHE B24
B40 SDNP B16 SUPP
PADDLE SHIFTER
(UPSHIFT SWITCH)
PADDLE SHIFTER
(DOWNSHIFT SWITCH) SHIFT SOLENOID
VALVE A
SHIFT SOLENOID
VALVE B
SHIFT SOLENOID
VALVE C
SHIFT SOLENOID
VALVE D
SHIFT SOLENOID
VALVE E
08/08/21 14:12:40 61SNR030_110_0020
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Vacuum Distribution
K20Z2 engine
11-23
3ENGINE
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
17ATMOSPHERE
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
(cont’d)
08/08/21 14:12:41 61SNR030_110_0023
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Vacuum Distribution (cont’d)
K20Z3 engine
11-24Fuel and Emissions Systems
System Description (cont’d)
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
08/08/21 14:12:42 61SNR030_110_0024
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ECM/PCM Inputs and Outputs at Connector A ( ) (44P)
Terminal
numberWire color Terminal name DescriptionSignal
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
relayWith 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
memoryWith ignition switch ON (II): about 0 V
With ignition switch OFF: battery voltage
8 ORN IGP (POWER SOURCE) Power source for ECM/PCM circuitWith 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 relayWith 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 signalWith 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 voltageWith 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)
(cont’d)
Terminal side of female terminals
08/08/21 14:12:42 61SNR030_110_0025
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