radiator ACURA CSX 2006 Service Workshop Manual

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YES
NO
10-30 Fan Controls
Radiator Fan High Speed Circuit Troubleshooting (cont’d)
FAN CONTROL RELAY 5P SOCKET
FANH (GRY)
ECM/PCM CONNECTOR A (44P)
22. Check for continuity between fan control relay 5P socket terminal No. 3 and ECM/PCM connector
terminal A5.
Update the ECM/PCM if it does not have the
latest software (see page 11-227), or substitute a
known-good ECM/PCM (see page 11-7), then
recheck. If the symptom goes away with a known-
good ECM/PCM, replace the original ECM/PCM
(see page 11-228).
Repair open in the wire between fan control
relay 5P socket terminal No. 3 and ECM/PCM
connector terminal A5.
Terminal side of female terminals
Terminal side of female terminals
Is there continuity?
08/08/21 14:40:34 61SNR030_100_0030
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Learn Procedure (without the HDS)How to End a Troubleshooting Session
(required after any troubleshooting)
11-5
1. Start the engine. Hold the engine speed at
3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on.
2. Test-drive the vehicle on a level road: Decelerate (with the throttle fully closed) from an engine speed
of 2,500 rpm down to 1,000 rpm with the A/T in
S in 1st or 2nd, or M/T in 1st.
3. Test-drive the vehicle on a level road: Decelerate (with the throttle fully closed) from an engine speed
of 5,000 rpm down to 3,000 rpm with the A/T in
S in 1st or 2nd, or M/T in 1st.
4. Repeat step 2 and 3 several times.
5. Turn the ignition switch to LOCK (0).
6. Turn the ignition switch to ON (II), and wait 30 seconds. 1. Reset the ECM/PCM with the HDS.
2. Do the ECM/PCM idle learn procedure (see page
11-310).
3. Turn the ignition switch to LOCK (0).
4. Disconnect the HDS from the DLC. NOTE: The ECM/PCM is part of the immobilizer
system. If you replace the ECM/PCM, it will have a
different immobilizer code. For the engine to start,
you must rewrite the immobilizer code with the
HDS.
(cont’d)
08/08/21 14:12:33 61SNR030_110_0005
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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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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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11-57
ETCS
CONTROL
RELAY
A/C COMPRESSOR
CLUTCH RELAY
ELD BATTERY
UNDER-HOOD FUSE/RELAY BOX
WHT
BRN D1
ORN D4
WHT D8
YEL A1
ORN A3
BLK A2
G301 GRY
PUR E6
BLU E7
ORN
E5
E1
LT BLU
C1
IG1ETCS 21
WHT P
M
A23
ELD U RED
F20
PNK
F16 F14
GRN
F9 F7
ORN
F6
YEL
F5
A14
ACC A21
SUBRLY A5
FANH A6
MRLY A4
FANL A8
IGP A20
ETCSRLY
ORN L
AD
AC AE
ABAA
Z PGM-FI
SUBRELAY
PGM-FI
MAIN
RELAY 1
IGNITION
COIL
RELAYA/C
CONDENSER
FAN RELAY
COOLING
FAN
CONTROL
RELAY
RADIATOR
FAN RELAY
9
10
ORN
ORN YEL/BLK
A
AH
F19
H1
C101 PUR
C101
PUR
G1
15
3
(cont’d)
08/08/21 14:13:52 61SNR030_110_0057
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11-67
ETCS
CONTROL
RELAY
A/C COMPRESSOR
CLUTCH RELAY
ELD BATTERY
UNDER-HOOD FUSE/RELAY BOX
WHT H1
BRN D1
ORN D4
WHT D8
YEL A1
ORN A3
BLK A2
G301 GRY
PUR E6
BLU E7
ORN
E5 E1
LT BLU
C1
IG1ETCS 21
C101
WHT K
J
A23
ELD Q RED
F20
PUR
F19
F16 F14
GRN
F9
F7
ORN
F6
YEL
F5
A14
ACC A21
SUBRLY A5
FANH A6
MRLY A4
FANL A8
IGP A20
ETCSRLY
ORN I
U
Y Z
XW
V N
PGM-FI
SUBRELAYPGM-FI
MAIN
RELAY 1
IGNITION
COIL
RELAYA/C
CONDENSER
FAN RELAY
COOLING
FAN
CONTROL
RELAY
RADIATOR
FAN RELAY
G1
9
10
ORN
ORN C101
YEL/BLK
A
PURPNK
15
3
(cont’d)
08/08/21 14:15:31 61SNR030_110_0067
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DTC P0101:
YES
NO
YES
NO
YES
NO YES
NO
YES
NO
YES
NO
11-74
PGM-FI System
DTC Troubleshooting
MAF Sensor Circuit Range/
Performance Problem
NOTE:
 Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
 If DTC P1128, P1129, P2228, and/or P2229 are stored at the same time as DTC P0101, troubleshoot those
DTCs first, then recheck for DTC P0101.
1. Check for poor connections or damage to these parts:
 PCV hose
 Intake air duct
 Air cleaner
 Purge (PCS) line
 Brake booster
 Brake booster hose
Go to step 2.
Repair or replace the damaged part(s), then
go to step 17.
2. Check for damage or looseness at the air duct in the air cleaner.
Go to step 3.
Reconnect or replace the air duct in the air
cleaner, then go to step 15.
3. Check for a dirty air cleaner element.
Replace the air cleaner element (see page
11-346), then go to step 15.
Go to step 4. 4. Turn the ignition switch to LOCK (0).
5. Turn the ignition switch to ON (II).
6. Check the MAF SENSOR in the DATA LIST with the
HDS.
Go to step 7.
Go to step 13.
7. Start the engine.
8. Vary the engine speed between 2,000 rpm and 3,000 rpm.
9. Check the MAF SENSOR in the DATA LIST with the HDS.
Go to step 10.
Go to step 13.
10. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in neutral) until the radiator fan
comes on, then let it idle.
11. Test-drive the vehicle for several minutes in the range of these recorded freeze data parameters:
 ENGINE S PEED
 VSS
 MAP SENSOR
 MAF SENSOR
12. Monitor the OBD STATUS for DTC P0101 in the DTCs MENU with the HDS.
Go to step 13.
If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the MAF
sensor/IAT sensor and the ECM/PCM. If the screen
indicates NOT COMPLETED, go to step 11 and
recheck.
Ar e t he par t s OK ?
Is it OK ?Is it dirty? Is t her e about 0.2 gm/ s or 0.5 V ?
Does t he r ead i ng change?
Does t he scr een i nd i cat e F AILE D?
08/08/21 14:15:37 61SNR030_110_0074
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DTC P0116:
YES
NO
YES
NO YES
NO
YES
NO
11-90PGM-FI System
DTC Troubleshooting (cont’d)
ECT Sensor 1 Circuit Range/
Performance Problem
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Check ECT SENSOR 1 in the DATA LIST with the HDS.
Go to step 6.
Go to step 3.
3. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
4. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
5. Check ECT SENSOR 1 in the DATA LIST with the HDS.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at ECT sensor 1 and the ECM/PCM.
Go to step 11.
6. Note the value of ECT SENSOR 1 in the DATA LIST with the HDS.
7. Turn the ignition switch to LOCK (0).
8. Open the hood, and let the engine cool for 3 hours.
9. Turn the ignition switch to ON (II). 10. Check ECT SENSOR 1 in the DATA LIST with the
HDS.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at ECT sensor 1 and the ECM/PCM.
Go to step 11.
11. Turn the ignition switch to LOCK (0).
12. Replace ECT sensor 1 (see page 11-225).
13. Turn the ignition switch to ON (II).
14. Reset the ECM/PCM with the HDS.
15. Do the ECM/PCM idle learn procedure (see page 11-310).
16. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at ECT sensor 1 and the ECM/PCM, then
go to step 1.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs are indicated, go to the
indicated DTC’s troubleshooting.
I s about 80 ° C ( 17 6 ° F ) or mor e, or 0.7 8 V or l ess indicated?
Does E CT SE N SOR 1 change 10 ° C ( 18 ° F ) ormor e? Does E CT SE N SOR 1 change 10 ° C ( 18 ° F ) or
mor e?
Is DTC P0116 indicated?
08/08/21 14:15:42 61SNR030_110_0090
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DTC P0128:
YES
NO
YES
NO YES
NO
YES
NO
YES
NO
11-96PGM-FI System
DTC Troubleshooting (cont’d)
Cooling System Malfunction
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Make sure the blower switch is OFF.
4. Check the FAN CTRL in the DATA LIST with the HDS.
Go to step 5.
Wait until the FAN CTRL is off, then go to step
5.
5. Check the radiator fan operation.
Check the radiator fan high speed circuit
(see page 10-26), and the radiator fan relay
(see page 22-70). If the circuit and the relay are OK,
go to step 19.
Go to step 6.
6. Let the engine cool until the coolant temperature is 40 °C (104 °F) or less.
7. Note the value of ECT SENSOR 1 and ECT SENSOR 2intheDATALISTwiththeHDS.
8. Start the engine, and let it idle.
9. Let the engine idle until ECT SENSOR 1 goes up 22 °C (40 °F) or more from the recorded
temperature.
10. Check ECT SENSOR 2 in the DATA LIST with the HDS. 11. Compare the recorded value of ECT SENSOR 2 and
the present value of ECT SENSOR 2.
Intermittent failure, the system is OK at this
time. Check for poor connections or loose terminals
at ECT sensor 1, ECT sensor 2, and the ECM/PCM.
Test the thermostat (see page 10-5), then go
to step 12.
12. Turn the ignition switch to ON (II).
13. Reset the ECM/PCM with the HDS.
14. Let the engine cool until the coolant temperature is between 6 °C (21 °F) and 40 °C (104 °F).
15. Do the ECM/PCM idle learn procedure (see page 11-310).
16. Test-drive at a steady speed between 24 120 km/h (15 75 mph) for 10 minutes.
17. Check for Temporary DTCs or DTCs with the HDS.
Check the cooling system (see page 10-2),
then go to step 1.
Go to step 18.
18. Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 17,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check the
coolingsystem(seepage10-2),thengotostep1.If
the screen indicates NOT COMPLETED, go to step
14.
Is it OFF?
Does t he r ad i at or f an k eep r unni ng? Di d t emper at ur e r i se 8 ° C ( 14 ° F ) or mor e f r om t he
r ecor d ed t emper at ur e?
Is DTC P0128 indicated?Does t he scr een i nd i cat e PASSE D?
08/08/21 14:17:17 61SNR030_110_0096
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YES
NO
YES
NO
YES
NO
DTC P0133:
11-9711-97
19. Update the ECM/PCM if it does not have the latest
software (see page 11-227), or substitute a known-
good ECM/PCM (see page 11-7).
20. Let the engine cool until the coolant temperature is between 6 °C (21 °F) and 40 °C (104 °F).
21. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
22. Test-drive at a steady speed between 24 120 km/h (15 75 mph) for 10 minutes.
23. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at ECT sensor 1, ECT sensor 2, and the
ECM/PCM. If the ECM/PCM was updated, substitute
a known-good ECM/PCM (see page 11-7), then go
to step 20. If the ECM/PCM was substituted, go to
step 1.
Go to step 24.
24. Monitor the OBD STATUS for DTC P0128 in the DTCs MENU with the HDS.
If the ECM/PCM was updated,
troubleshooting is complete. If the ECM/PCM was
substituted, replace the original ECM/PCM
(see page 11-228). If any other Temporary DTCs or
DTCs were indicated in step 23, go to the indicated
DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at ECT sensor 1,
ECT sensor 2, and the ECM/PCM. If the ECM/PCM
was updated, substitute a known-good ECM/PCM
(see page 11-7), then go to step 20. If the ECM/PCM
was substituted, go to step 1. If the screen indicates
NOT COMPLETED, go to step 20. NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot, and review the general
troubleshooting information (see page 11-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine. Hold the engine speed at 3,000 rpm without load (A/T in P or N, M/T in
neutral) until the radiator fan comes on, then let it
idle.
4. Test-drive under these conditions:  Engine coolant temperature (ECT SENSOR 1)above70°C(158°F)
 A/TinD,M/Tin3rdor4th
 Drive the vehicle at 40 km/h (25 mph) or less for 5 minutes, then drive at a steady speed between
41 130 km/h (26 81 mph).
5. Monitor the OBD STATUS for DTC P0133 in the DTCs MENU with the HDS.
Go to step 6.
If the screen indicates PASSED, intermittent
failure, the system is OK at this time. Check for
poor connections or loose terminals at the A/F
sensor (Sensor 1) and the ECM/PCM. If the screen
indicates EXECUTING, keep driving until a result
comes on. If the screen indicates OUT OF
CONDITION, go to step 3 and recheck.
6. Turn the ignition switch to LOCK (0).
7. Replace the A/F sensor (Sensor 1) (see page 11-221).
8. Turn the ignition switch to ON (II).
9. Reset the ECM/PCM with the HDS.
(cont’d)A/F Sensor (Sensor 1)
Malfunction/Slow Response
Is DTC P0128 indicated?
Does t he scr een i nd i cat e PASSE D? Does t he scr een i nd i cat e F AILE D?
08/08/21 14:17:17 61SNR030_110_0097
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