engine ACURA CSX 2006 Service Repair Manual

Î
´
ECM/PCM Circuit Diagram (K20Z2 engine) (cont’d)
11-58Fuel and Emissions Systems
System Description (cont’d)
Z
C36 IG1
A44 S-NET5V
A15
IMOFPR
A31
SCS
A40
BKSW BLK/GRN
C101 2
MICU
V
PGM-FI MAIN
RELAY 2
(FUEL PUMP)
UNDER-DASH FUSE/RELAY BOX
F5
YEL
F8
PNK
F10
BRN
F11
BRN
F24
BRN
F25
LT GRN
F30
LT GRN
F31
WHT
F29
G2
ORN
G4
ORN
BRN
G16
WHT
G20
WHT
Q1
WHT
Q5
ORN
Q8
LT BLU
E9
GRN
E27
YEL
IG2
B IG1
D1
WHT
D2
BLU
C3
ORN
C1
YEL
3
AD
ST
AC
AB
O
ORN
AE
AA
YW
X
ST6
4
1
R
IGNITION SWITCH FUEL PUMPP
2
4
BLK E28
G601
IG1 HOT in ON (II)
and START (III) YEL
G12 STARTER
CUT RELAY
(ST CUT)
22
UNDER-HOOD FUSE/RELAY BOX: No. 21 DBW (THROTTLE
ACTUATOR CONTROL) (15 A) No. 18 IG COIL (15 A)
No.19FIMAIN(15A)
No.11FISUB(15A)
No.15OILLVL(7.5A)
No. 2 IG MAIN (50 A)
No. 23 BACK UP (10 A)
No.12STOP&HORN(15A)
No. 1 MAIN FUSE (100 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)
No. 10 METER (7.5 A)
08/08/21 14:13:53 61SNR030_110_0058
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ECM Circuit Diagram (K20Z3 engine)
11-59
No. 1 INJECTOR
No. 2 INJECTOR
No. 3 INJECTOR
No. 4 INJECTOR
YEL/BLK YEL/BLK YEL/BLK
YEL/BLK
CKP SENSOR
YEL/BLK
YEL/BLK
BRN/YEL
BRN/YEL 3
1 2
3
1 2
YEL
BLU
RED
BRN
YEL/BLK24P JUNCTION
CONNECTOR
CMP SENSOR B
A
BLU/YEL GRN
C8
C6
C7C5
C31
C32 INJ4
INJ2
INJ3INJ1
CMPB
CKP 18 20 19 24 23 22
21
ECM
H
BLU/WHT
CMP SENSOR A
BLK/YEL
BRN/YEL
C41
CMPA
AA
5V
3
1 2 1
2
1
2
1
2
1
2
(cont’d)
08/08/21 14:13:54 61SNR030_110_0059
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ECM Circuit Diagram (K20Z3 engine) (cont’d)
11-60Fuel and Emissions Systems
System Description (cont’d)
C22
BLU/BLK
BRN/YELROCKER ARM
OIL PRESSURE
SWITCH
MAP SENSOR
C13
C11
C14 YEL/RED
GRN/WHT
C23 BLU/WHT
C42
RED/BLU
KNOCK SENSOR1
1
GRN/RED
RED/BLU
C106
VTC OIL CONTROL
SOLENOID VALVE
B34
GRN/YEL
VTPSW VTS
VCC1
MAP
SG1
KS
VTC BLU/WHT
2
1
G101 1
10 YEL/RED
GRN/WHT GRN/RED
C B
3
2 2
3
G101 BLU/BLKROCKER ARM
OIL CONTROL
SOLENOID
1
GRN/YEL 2
2
B18
YEL
VCC2
C43 BLK/WHT
NC
GRN/BLK1
OUTPUT SHAFT
(COUNTERSHAFT)
SPEED SENSOR
12 V
BLK
AB
BLK
08/08/21 14:13:54 61SNR030_110_0060
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ÎECM Circuit Diagram (K20Z3 engine) (cont’d)
11-62Fuel and Emissions Systems
System Description (cont’d)
EVAP CANISTER
PURGE VALVE
BLK/YEL
B3
IBLK/YEL
BLK/YEL
No. 1 IGNITION COILNo. 3 IGNITION COIL
C15
C16
C17
G101BLK BLK
BLK/WHT
BLK
ICM To
SPARK
PLUG
ICM
To
SPARK
PLUG
ICM
To
SPARK
PLUG
No. 2 IGNITION COIL
17
WHT/BLU BLU/RED No. 4 IGNITION COIL
C18
BLKICM To
SPARK
PLUG
24P JUNCTION
CONNECTOR
24P JUNCTION
CONNECTOR
BLK
J
BLK/
WHT BLK/YEL
B42
YEL/GRN BLK/WHT
BLK/WHT
BRN BLK/WHT
WHT/BLU
ALTERNATOR
1
1
3
YEL/BLU
BLK/YEL
D
WHT/BLU
C106
9
B43 WHT/RED WHT/RED
WHT/GRN
B41 WHT/GRN 4
6
1
3
5
YEL C101
7
2
34
2
8
6 7
BLK/YEL
WHT/BLU
WHT/RED
WHT/GRN
PCS
IGPLS1
IGPLS2
IGPLS3
IGPLS4 ALTL
ALTF ALTC H
WHT/BLU
BLU/RED YEL/GRN
BRN
BLU
8
C101
13
1415 16
1
2
3
1
2
3
1
2
3
1
2 YEL/BLU
REVERSE LOCKOUT
SOLENOID
GRN/BLK
1
2
BLK/YEL
A27
RVS
GRN 20
C101 2
4
15
16
08/08/21 14:15:27 61SNR030_110_0062
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ÎECM Circuit Diagram (K20Z3 engine) (cont’d)
11-64Fuel and Emissions Systems
System Description (cont’d)
ECT SENSOR 2
1
A33
ECT2
2
A9
SG6 GRN
BLK
A/C PRESSURE
SENSOR
1
A19
VCC6 RED
2
A16
ACPD LT GRN
3
BLK
1
FTP SENSOR
2
A26
FTP
3
BLK
1
A10
VSV LT GRN
LT GRN
EVAP CANISTER
VENT SHUT VALVE
2
PUR
A28
NEP BLU
To
EPS CONTROL UNIT
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 12
9
10
11 8
RED
BLK
PUR C204
O Q
P BRAKE PEDAL
POSITION SWITCH
N
LT BLU Clutch pedal pressed: open
Clutch pedal released: closed
CLUTCH PEDAL
POSITION SWITCH
A41
CRMTCLS L
BLK 3 2
G401 BLU
LT GRN
LT GRN RED BLK
08/08/21 14:15:29 61SNR030_110_0064
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Î
ECM Circuit Diagram (K20Z3 engine) (cont’d)
11-66Fuel and Emissions Systems
System Description (cont’d)
GAUGE CONTROL
MODULE (TACH)
RED
A42
WEN
WHT
A36
CANH
RED
A37
CANL
BLU
A29
VSSOUT 10
RED
11
BLK
7
WHT
14
RED
5
BLU
8
WHT
10
BLK
5
RED
7
WHT
6
RED
3
ORN
9
LT BLU
7
ORN
4
LT BLU
8
WHT
C201
BRN
DATA
LINK
CONNECTOR
5
7
9
14
6 12
16
4
BLK JUNCTION BOX
G
SRS UNIT RED
WHT 9
10
15
1
1
15
EPS CONTROL UNIT
VSA MODULATOR-
CONTROL UNIT
RED WHT
7
13
14
12 11
1
2
*8 2
2
BLU BLU
To MOONROOF
CONTROL UNIT/MOTOR To AUDIO UNIT 12P
JUNCTION
CONNECTOR
12 8 5 10
911
C501 RED
WHT
10
9
76
TS
R
YAW RATE-LATERAL
ACCELERATION SENSOR 3
4
TPMS CONTROL
UNIT 15
14
CANL
CANH
CANL CANH
11
12 CANH CANL
2
11 CANH CANL
CANH CANL
WHT RED19
1
G502
CANL
CANH
4
3
(1)*9
(2)*9
*8: ’09 model
*9: With Premium Audio
08/08/21 14:15:30 61SNR030_110_0066
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Î
´
ECM Circuit Diagram (K20Z3 engine) (cont’d)
11-68Fuel and Emissions Systems
System Description (cont’d)
PGM-FI MAIN
RELAY 2
(FUEL PUMP)
UNDER-DASH FUSE/RELAY BOX
STARTER
CUT RELAY
(ST CUT)
F5
YEL
F8
PNK
F10
BRN
F11
BRN
F24
F25
LT GRN
F30
LT GRN
F31
WHT
F29
G2
ORN
G4
ORN
G12
BRN
G16
WHT
G20
WHT
Q1
WHT
Q5
ORN
Q8
LT BLU
E9
GRN
E27
YEL
IG2
B IG1
D1
WHT
D2
BLU
C3
ORN
C1
YEL
3 UOPY
V
X
C36 IG1
A44 S-NET5V
A15 IMOFPR
A31
SCS
A40
BKSW
G401 BLK/GRN
C101 2
BLK
TRS
ST6
4
1
M
IGNITION SWITCH MICU
FUEL PUMP P
2
4
BLK
1
2
CLUTCH
INTERLOCK
SWITCH ZW
Clutch pedal pressed: closed
Clutch pedal released: open
IG1 HOT in ON (II)
and START (III)
ORN
G601BRN
22
UNDER-HOOD FUSE/RELAY BOX:
No. 21 DBW (THROTTLE
ACTUATOR CONTROL) (15 A) No. 18 IG COIL (15 A)
No.19FIMAIN(15A)
No.11FISUB(15A)
No.15OILLVL(7.5A)
No. 2 IG MAIN (50 A)
No. 23 BACK UP (10 A)
No.12STOP&HORN(15A)
No. 1 MAIN FUSE (100 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)
08/08/21 14:15:32 61SNR030_110_0068
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µµ
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)
Malfunction Indicator Lamp (MIL) Indication
(In relation to Readiness Codes) Catalytic Converter Monitor and Readiness
Code
Enable Criteria
Procedure
11-69
How to Set Readiness Codes
The vehicle has certain readiness codes that are part of
the on-board diagnostics for the emissions systems. If
the vehicle’s battery has been disconnected or gone
dead, if the DTCs have been cleared, or if the ECM/PCM
has been reset, these readiness codes are reset to
incomplete. In some states, part of the emissions
testing is to make sure these codes are set to complete.
If all of them are not set to complete, the vehicle may
fail the emission test, or the test cannot be finished.
To check if the readiness codes are set to complete,
turn the ignition switch to ON (II), but do not start the
engine. The MIL will come on for 15 20 seconds. If it
then goes off, the readiness codes are set to complete.
If it flashes five times, one or more readiness codes are
not set to complete. To set readiness codes from
incomplete to complete, do the procedure for the
appropriate code.
To check the status of a specific DTC system, check the
OBD status in the DTC MENU with the HDS (see page
11-8). This screen displays the code, the current data list
of the enable criteria, and the status of the readiness
testing. NOTE:
 Do not turn the ignition switch to LOCK (0) or ACC (I) during the procedure.
 All readiness codes are cleared when the battery is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.
 Low ambient temperatures or excessive stop-and-go traffic may increase the drive time needed to switch
the readiness code from incomplete to complete.
 The readiness code will not switch to complete until all the enable criteria are met.
 If a fault in the secondary HO2S system caused the MIL to come on, the readiness code cannot be set to
complete until you correct the fault.
 ECT SENSOR 1 at 70 °C (158 °F) or more.
 IAT SENSOR at 7 °C (20 °F) or more.
 Vehicle speed (VSS) above 40 km/h (25 mph). 1. Connect the HDS to the vehicle’s data link connector (DLC), and bring up the READINESS
CODEs screen for Catalyst in the DTCs MENU.
2. Start the engine.
3. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. After about
8 km (5 miles), the readiness code should switch to
complete.
4. If the readiness code is still not set to complete, check for a Temporary DTC with the HDS. If there is
no DTC, one or more of the enable criteria were
probably not met; repeat the procedure.
(cont’d)
08/08/21 14:15:32 61SNR030_110_0069
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Evaporative Emission (EVAP) Control
System Monitor and Readiness CodeAir Fuel Ratio (A/F) Sensor Monitor and
Readiness Code
Enable Criteria
Procedure Enable Criteria
Procedure
11-70Fuel and Emissions Systems
How to Set Readiness Codes (cont’d)
NOTE: All readiness codes are cleared when the battery
is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.
 Battery voltage is more than 10.5 V.
 Engine at idle.
 ECT SENSOR 1 and ECT SENSOR 2 between 80 °C (176 °F) and 100 °C (212 °F).
 MAP SENSOR less than 46.6 kPa (350 mmHg, 14 in.Hg).
 Vehicle speed (VSS) 0 km/h (0 mph).
 IAT SENSOR between 0 °C (32 °F) and 100 °C (212 °F).
1. Connect the HDS to the DLC.
2. Start the engine.
3. Select EVAP TEST in the INSPECTION MENU with the HDS, then select the FUNCTION TEST in the
EVAP TEST MENU.
 If the result is normal, readiness is complete.
 If the result is not normal, go to the next step.
4. Check for a Temporary DTC. If there is no DTC, one or more of the enable criteria were probably not
met; repeat the procedure. NOTE:
 Do not turn the ignition switch to LOCK (0) or ACC (I) during the procedure.
 All readiness codes are cleared when the battery is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.
ECT SENSOR 1 at 60 °C (140 °F) or more. 1. Start the engine.
2. Test-drive the vehicle under stop-and-go conditions with short periods of steady cruise. During the
drive, decelerate (with the throttle fully closed) for
5 seconds. After about 5.6 km (3.5 miles), the
readiness code should switch from incomplete to
complete.
3. Check the readiness codes screen for the air fuel ratio (A/F) sensor in the DTCs MENU with the HDS.
 If the screen shows complete, readiness is complete.
 If the screen shows not complete, go to the next step.
4. Check for a Temporary DTC. If there is no DTC, the enable criteria was probably not met. Select the
DATA LIST MENU. Check the ECT SENSOR 1 in the
ALL DATA LIST with the HDS. If the ECT SENSOR 1
is less than 60 °C (140 °F), run the engine until it is
more than 60 °C (140 °F), then repeat the procedure.
08/08/21 14:15:32 61SNR030_110_0070
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µµ
Air Fuel Ratio (A/F) Sensor Heater Monitor
Readiness Code
Misfire Monitor and Readiness Code
Fuel System Monitor and Readiness Code
Comprehensive Component Monitor and
Readiness CodeEGR Monitor and Readiness Code
Procedure
Enable Criteria
Procedure
11-71
NOTE: All readiness codes are cleared when the battery
is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.
1. Start the engine, and let it idle for 1 minute. The readiness code should switch from incomplete to
complete.
2. If the readiness code is still not set to complete, check for a Temporary DTC. If there is no DTC,
repeat the procedure.
 This readiness code is always set to available because misfiring is continuously monitored.
 Monitoring pauses, and the misfire counter resets, if the vehicle is driven over a rough road.
 Monitoring also pauses, and the misfire counter holds at its current value, if the throttle position
changes more than a predetermined value, or if
driving conditions fall outside the range of any
related enable criteria.
 This readiness code is always set to available because the fuel system is continuously monitored
during closed loop operation.
 Monitoring pauses when the catalytic converter, EVAP control system, and A/F sensor monitors are
active.
 Monitoring also pauses when any related enable criteria are not being met. Monitoring resumes when
the enable criteria is again being met.
This readiness code is always set to available because
the comprehensive component monitor is continuously
running when ever the engine is cranking or running. NOTE:
 Do not turn the ignition switch to LOCK (0) or ACC (I) during the procedure.
 All readiness codes are cleared when the battery is disconnected, if the DTCs have been cleared, or if the
ECM/PCM is reset with the HDS.
ECT SENSOR 1 at 80 °C (176 °F) or more. 1. Connect the HDS to the DLC.
2. Start the engine.
3. Drive at a steady speed with the A/T in D position or M/T in 4th gear, at 80 100 km/h (50 62 mph) or
above for more than 10 seconds.
4. With the A/T in D position or M/T in 4th gear, decelerate from 100 km/h (62 mph) or above by
completely releasing the throttle for at least
5 seconds. If the engine is stopped during this
procedure, go to step 3 and do the procedure again.
5. Check the OBD status screen for DTC P0401 in the DTC’s MENU with the HDS.
 If it is PASSED, readiness is complete.
 If it is not PASSED, go to step 3 and retest.
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