2006 ACURA CSX coolant temperature

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K20Z3 engine
10-3
THERMOSTAT
RADIATOR
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
WATER PUMP
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY WATER OUTLET
COOLANT SEPARATOR
OIL COOLER
WATER PASSAGE
Test, page 10-5
Replacement, page 10-10
Replacement, page 10-19
Inspection, page 10-6
Replacement, page 10-6
Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-19
Fan Motor Test, page 10-5 Replacement, page 10-16
Replacement, page 10-11
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K20Z2 engine
Engine Coolant Capacities (Including the coolant
reservoir capacity of 0.4 L (0.11 US gal))
M/T model:
After Coolant Change: 4.3 L (1.14 US gal)
After Engine Overhaul: 6.6 L (1.74 US gal)
A/T model:
After Coolant Change: 4.2 L (1.11 US gal)
After Engine Overhaul: 6.5 L (1.72 US gal)
K20Z3 engine
Engine Coolant Capacities (Including the coolant
reservoir capacity of 0.4 L (0.11 US gal))
After Coolant Change: 4.5 L (1.19 US gal)
After Engine Overhaul: 6.8 L (1.80 US gal)
10-8
Cooling System
Coolant Replacement
A
A
1. Wait until the engine is cool, then carefully removethe radiator cap.
2. Start the engine. Set the heater temperature control dial to maximum heat, then turn the ignition switch
to LOCK (0). Make sure the engine and the radiator
are cool to the touch.
3. Loosen the drain plug (A), and drain the coolant.
4. After the coolant has drained, tighten the radiator drain plug securely.
5. Remove, drain, and reinstall the coolant reservoir.
6. Fill the coolant reservoir to the MAX mark (A) with Honda Long Life Antifreeze/Coolant Type 2 (P/N
CA66688). 7. Pour Honda Long Life Antifreeze/Coolant Type 2
into the radiator up to the base of the filler neck.
NOTE: Always use Honda Long Life Antifreeze/Coolant Type 2. Using a non-Acura coolant can result in
corrosion, causing the cooling system to
malfunction or fail.
 Honda Long Life Antifreeze/Coolant Type 2 is a mixture of 50 % antifreeze and 50 % water. Do
not add water.
08/08/21 14:39:59 61SNR030_100_0008
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10-9
8. Loosely install the radiator cap.
9. Set the heater temperature control dial tomaximum heat.
10. Start the engine, and let it run until it warms up (the radiator fan comes on at least twice).
11. Turn off the engine. Check the level in the radiator, and add Honda Long Life Coolant/Antifreeze
Type 2, if needed.
12. Install the radiator cap securely, then start the engine again, and check for leaks.
13. Clean up any spilled engine coolant.
14. If the maintenance minder required engine coolant replacement, reset the maintenance minder
(see page 3-6), and this procedure is complete. If
the maintenance minder did not require engine
coolant replacement, go to step 15.
15. Turn the ignition switch to LOCK (0).
16. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3).
17. Turn the ignition switch to ON (II).
18. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain
control module (PCM). If it does not communicate,
troubleshoot the DLC circuit (see page 11- 204).
19. Select GAUGES in the BODY ELECTRICAL menu with the HDS.
20. Select ADJUSTMENT in the GAUGES with the HDS.
21. Select SERVICE REMINDER in the ADJUSTMENT menu with the HDS.
22. Select RESET in the SERVICE REMINDER menu with the HDS.
23. Select MAINTENACE SUB ITEM 5 RESET menu with the HDS.
08/08/21 14:39:59 61SNR030_100_0009
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10-21
BA
C
A B
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft)
A
6x1.0mm
10 N·m (1.0 kgf·m, 7.2 lbf·ft) C
9. Disconnect the engine coolant temperature (ECT)
sensor 2 connector (A), and remove the harness
clamp (B).
10. Disconnect the lower radiator hose (C) from the radiator.
11. A/T model: Disconnect the automatic transmission fluid (ATF) cooler hoses (A), then plug the lines and
the hoses. 12. Lower the vehicle on the lift.
13. Remove the condenser bracket mounting bolts (A)
and the bulkhead mounting bolts (B), then remove
the bulkhead (C).
(cont’d)
08/08/21 14:40:28 61SNR030_100_0021
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10-22Cooling System
Radiator and Fan Replacement (cont’d)
RADIATOR FAN MOTOR
6x1.0mm
7 N·m
(0.7 kgf·m, 5 lbf·ft) RADIATOR FAN
UPPER RADIATOR HOSE
LOWER RADIATOR HOSE
O-RING
RADIATOR CAP
RADIATOR
O-RING LOWER CUSHION
DRAIN PLUG
6x1.0mm
7 N·m
(0.7 kgf·m, 5 lbf·ft)
A/C CONDENSER
FAN/SHROUD ASSEMBLY
RADIATOR FAN SHROUD
ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2
12 N·m (1.2 kgf·m, 8.7 lbf·ft)
3.85 N·m
(0.393 kgf·m, 2.84 lbf·ft)
6.0 N·m
(0.61 kgf·m, 4.4 lbf·ft)
QUICK CONNECTOR
O-RING
14. Pull up the radiator, then remove the fan shroud assemblies and other parts from the radiator.
15. Install the radiator in the reverse order of removal. Make sure the upper and lower cushions are set securely.
16. Connect the lower radiator hose to the radiator.
17. Install the bulkhead in the reverse order of removal. Apply body paint to the bulkhead mounting bolts.
18. Do the battery installation procedure (see page 22-69).
19. Fill the radiator with engine coolant, and bleed the air from the cooling system with heater valve open (see step 6 on page 10-8).
20. Clean up any spilled engine coolant.
Replace. Replace.
Replace.
08/08/21 14:40:29 61SNR030_100_0022
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10-23
Fan Controls
Component Location Index
FAN CONTROL RELAY
UNDER-HOOD FUSE/RELAY BOX
RADIATOR FAN RELAY
A/C CONDENSER FAN ASSEMBLY RADIATOR FAN ASSEMBLY ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 2ENGINE COOLANT TEMPERATURE
(ECT) SENSOR 1
A/C CONDENSER FAN RELAY
Test, page 22-70
Test, page 22-70
Motor Test, page 10-5
Replacement, page 10-19 Motor Test, page 10-5
Replacement, page 10-19 Replacement, page 11-225Replacement, page 11-225
Test, page 22-70
08/08/21 14:40:31 61SNR030_100_0023
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10-25
Circuit Diagram
ECT2
SG6
SG2
ECT1 FANH
FANL
SUBRLY IG2HOTinON(II)
PNK
5V No. 15 (7.5 A)
A21
PUR
ECM/PCM
2G301
BLK
2
1
No. 11 (15 A)
(10 A) No. 36
B23
RED/WHT GRN/BLK B33
BLU GRY
BRN
A33
BLK GRN A9 IGNITION SWITCH
IG2
BAT
RED
3
2 5
4 1
A4
A5 13
4
2
1 2 23 4
1 No. 2 (50 A)
BLK
UNDER-HOOD FUSE/RELAY BOX
BATTERY
G301No. 1 (100 A)
No. 6 (20 A)
A/C
CONDENSER
FAN RELAY
ENGINE COOLANT
TEMPERATURE
(ECT) SENSOR 1
A/C
CONDENSER
FAN MOTOR
FAN
CONTROL
RELAY
RADIATOR
FAN
MOTOR
ENGINE COOLANT
TEMPERATURE
(ECT) SENSOR 2 RADIATOR
FAN
RELAY
PGM-FI
SUB RELAY
H1
3 4
ORN
G12
D1
F16
F7
F2
F12
F14
F1
F11 No. 7 (20 A)
21
1 UNDER-DASH
FUSE/RELAY
BOX
BRN
WHT
43
12 C3
08/08/21 14:40:32 61SNR030_100_0025
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DTC
(MIL indication ) Two Drive Cycle
Detection Detection Item MIL Note
11-9
DTC Troubleshooting Index
P0010 (56)
Variable Valve Timing Control (VTC) Oil Control Solenoid Valve
Malfunction ON (see page 11-274)
P0011 (56) Variable Valve Timing Control (VTC) System Malfunction ON (see page 11-276)
P0101 (50) Mass Air Flow (MAF) Sensor Circuit Range/Performance Problem ON (see page 11-74)
P0102 (50) Mass Air Flow (MAF) Sensor Circuit Low Voltage ON (see page 11-75)
P0103 (50) Mass Air Flow (MAF) Sensor Circuit High Voltage ON (see page 11-78)
P0107 (3) Manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage ON (see page 11-80)
P0108 (3) Manifold Absolute Pressure (MAP) Sensor Circuit High Voltage ON (see page 11-82)
P0111 (10) Intake Air Temperature (IAT) Sensor Circuit Range/Performance
Problem ON (see page 11-85)
P0112 (10) Intake Air Temperature (IAT) Sensor Circuit Low Voltage ON (see page 11-86)
P0113 (10) Intake Air Temperature (IAT) Sensor Circuit High Voltage ON (see page 11-87)
P0116 (86) Engine Coolant Temperature (ECT) Sensor 1 Circuit Range/
Performance Problem ON (see page 11-90)
P0117 (6) Engine Coolant Temperature (ECT) Sensor 1 Circuit Low Voltage ON (see page 11-91)
P0118 (6) Engine Coolant Temperature (ECT) Sensor 1 Circuit High Voltage ON (see page 11-92)
P0122 (7) Throttle Position (TP) Sensor A Circuit Low Voltage ON (see page 11-232)
P0123 (7) Throttle Position (TP) Sensor A Circuit High Voltage ON (see page 11-234)
P0125 (86) Engine Coolant Temperature (ECT) Sensor 1 Malfunction/Slow
Responce ON (see page 11-95)
P0128 (87) Cooling System Malfunction ON (see page 11-96)
P0133 (61) Air Fuel Ratio (A/F) Sensor (Sensor 1) Malfunction/Slow Response ON (see page 11-97)
P0134 (41) Air Fuel Ratio (A/F) Sensor (Sensor 1) Heater System Malfunction ON (see page 11-98)
P0135 (41) Air Fuel Ratio (A/F) Sensor (Sensor 1) Heater Circuit Malfunction ON (see page 11-99)
P0137 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit Low Voltage ON (see page 11-104)
P0138 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Circuit High Voltage ON (see page 11-106)
P0139 (63) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Slow Response ON (see page 11-109)
P0141 (65) Secondary Heated Oxygen Sensor (Secondary HO2S (Sensor 2))
Heater Circuit Malfunction ON (see page 11-110)
P0171 (45) Fuel System Too Lean ON (see page 11-113)
P0172 (45) Fuel System Too Rich ON (see page 11-113)
P0222 (7) Throttle Position (TP) Sensor B Circuit Low Voltage ON (see page 11-236)
P0223 (7) Throttle Position (TP) Sensor B Circuit High Voltage ON (see page 11-239)
P0300 (75)
and any
combination of
the following:
P0301 (71)
P0302 (72)
P0303 (73)
P0304 (74) Random Misfire Detected
ON (see page 11-115)
P0301 (71) No. 1 Cylinder Misfire Detected ON (see page 11-118)
P0302 (72) No. 2 Cylinder Misfire Detected ON (see page 11-118)
P0303 (73) No. 3 Cylinder Misfire Detected ON (see page 11-118)
P0304 (74) No. 4 Cylinder Misfire Detected ON (see page 11-118)
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.
4: K20Z2 engine
5: K20Z3 engine
(cont’d)
4
5 4
5
08/08/21 14:12:35 61SNR030_110_0009
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