2006 ACURA CSX tire pressure

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General Operation
Torque Converter, Gears, and Clutches
Electronic Control
Hydraulic Control
Shift Control Mechanism
Lock-up Mechanism
14-28Automatic Transmission
System Description
The automatic transmission is a combination of a three-element torque converter and triple-shaft electronically
controlled unit which provides five speeds forward and one in reverse. The entire unit is positioned in line with the
engine.
The torque converter consists of a pump, turbine, and stator assembly in a single unit. The converter housing (pump)
is connected to the engine crankshaft and turns as the engine turns. Around the outside of the torque converter is a
ring gear which meshes with the starter drive gear when the engine is being started. The entire torque converter
assembly serves as a flywheel while transmitting power to the transmission mainshaft. The transmission has three
parallel shafts; the mainshaft, the countershaft, and the secondary shaft. The mainshaft is in line with the engine
crankshaft, and includes the 4th and 5th clutches, and gears for 5th, 4th, reverse, and idler. The mainshaft reverse gear
is integral with the mainshaft 4th gear. The countershaft includes the gears for 1st, 2nd, 3rd, 4th, 5th, reverse, park,
and the final drive. The final drive gear is integral with the countershaft. The countershaft 4th gear and the
countershaft r
everse gear can be locked to the countershaft providing 4th or r everse gear, depending on which way
the selector is moved. The secondary shaft includes the 1st, 2nd, and 3rd clutches, and gears for 1st, 2nd, 3rd, and
idler. The idler gear shaft is located between the mainshaft and the secondary shaft, and the idler gear transmits
power between the mainshaft and the secondary shaft. The gears on the mainshaft and the secondary shaft are in
constant mesh with those on the countershaft. When certain combinations of gears in the transmission are engaged
by the clutches, power is transmitted through the mainshaft, then to the secondary shaft to the countershaft, or
through the mainshaft to the countershaft to provide drive.
The electronic control system consists of the powertrain control module (PCM), sensors, and shift solenoid valves.
Shifting and lock-up are electronically controlled for comfortable driving under all conditions. The PCM is located in
the engine compartment.
The valve bodies include the main valve body, the regulator valve body, and the servo body. They are bolted to the
torque converter housing. The main valve body contains the manual valve, shift valves A, B, C, and E, the relief valve,
the lock-up control valve, the cooler check valve, the servo control valve, and the ATF pump gears. The regulator valve
body contains the regulator valve, the torque converter check valve, the lock-up shift valve, and the 1st and 3rd
accumulators. The servo body contains the servo valve, shift valve D, the accumulators for 2nd, 4th, and 5th, and shift
solenoid valves A, B, C, D, and E. Fluid from the regulator passes through the manual valve to the various control
valves. The 1st, 3rd, and 5th clutches receive fluid from their respective feed pipes, and the 2nd and 4th clutches
receive fluid from the internal hydraulic circuit.
To shift gears, the PCM controls shift solenoid valves A, B, C, D, and E, and A/T clutch pressure control solenoid valves
A, B, and C, while receiving input signals from various sensors and switches located throughout the vehicle. The shift
solenoid valves shift the positions of the shift valves to switch the port leading hydraulic pressure to the clutch. A/T
clutch pressure control solenoid valves A, B, and C regulate their respective pressure, and pressurize the clutches to
engage them and their corresponding gears. The pressure of the A/T clutch pressure control solenoid valves also
applies to the shift valves to switch the port.
The lock-up mechanism operates in D (2nd, 3rd, 4th, and 5th gears). The pressurized fluid is drained from the back of
the torque converter through a fluid passage, causing the torque converter clutch piston to be held against the torque
converter cover. As this takes place, the mainshaft rotates at the same speed as the engine crankshaft. Together with
the hydraulic control, the PCM optimizes the timing and volume of the lock-up mechanism. When shift solenoid valve
E is turned on by the PCM, shift solenoid valve E pressure switches the lock-up shift valve on and off. A/T clutch
pressure control solenoid valve A and the lock-up control valve control the degree of lock-up.
08/08/21 14:37:16 61SNR030_140_0030
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Rotational play: 0 10 mm (0 0.39 in.)
17-417-4 Steering
Steering Wheel Rotational Play
Check
Power Assist Check
1. Turn the front wheels to the straight ahead position.
2. Measure how far you can turn the steering wheel
left and right without moving the front wheels.
 If the play is within the limit, the steering gearbox and steering linkage are OK.
 If the play exceeds the limit, adjust the rack guide (see page 17-15). If the play is still excessive after
rack guide adjustment, inspect the steering
linkage and steering gearbox (see page 17-5). NOTE: This test should be done with original equipment
tires and wheels at the correct tire pressure.
1. Start the engine, and let it idle.
2. Attach a commercially available spring scale to the steering wheel. With the engine idling and the
vehicle on a clean, dry floor, pull the scale as
shown, and read it as soon as the tires begin to turn.
3. Ifthescalereadsnomorethan34N(3.5kgf,7.7lbf), the power assist is OK. If it reads more, check these
items:
 Steering linkage (see page 17-5)
 Rack guide adjustment (see page 17-15)
 EPS system (see page 17-19)
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Suspension
Front and Rear Suspension
Front Suspension
Rear Suspension............................................. .............................................
TPMS (Tire Pressure Monitoring System)
(’08-09 Models) . 18-47
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Special Tools . 18-2
Component Location Index . 18-3
Wheel Alignment . 18-5
Wheel Bearing End Play Inspection . 18-9
Wheel Runout Inspection . 18-9
Wheel Bolt Replacement . 18-10
Ball Joint Removal . 18-12
Ball Joint Boot Inspection/Replacement . 18-13
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Knuckle/Hub/Wheel Bearing Replacement . 18-14
Lower Ball Joint Replacement
. 18-20
Lower Arm Removal/Installation . 18-22
Stabilizer Link Removal/Installation . 18-25
Stabilizer Bar Replacement . 18-25
Damper/Spring Removal and Installation . 18-26
Damper/Spring Disassembly, Inspection, and Reassembly . 18-28
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Knuckle/Hub Bearing Unit Replacement
. 18-31
Upper Arm Removal/Installation . 18-35
Trailing Arm Removal/Installation . 18-36
Stabilizer Link Removal/Installation . 18-37
Stabilizer Bar Replacement . 18-38
Damper Replacement . 18-39
Spring Replacement . 18-42
08/08/21 14:56:38 61SNR030_180_0001
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Pre-Alignment Checks
Caster Inspection
Tire size (’06-08 models):Except Type S model:Front/Rear: P205/55R16 89H
Type S model: Front/Rear: P215/45R17 87V
Tire size (’09 model): Front/Rear: P215/45R17 87V
Tire Pressure (’06-08 models) (at cold): Except Type S model:Front/Rear: 220 kPa (2.2 kgf/cm , 32 psi)
Type S model: Front/Rear: 230 kPa (2.3 kgf/cm , 33 psi)
Tire Pressure (’09 model) (at cold): Front/Rear: 230 kPa (2.3 kgf/cm , 33 psi) Caster angle: 7 ° 00 ’ 1 °
2
2
2
18-5
Wheel Alignment
The suspension can be adjusted for front camber, front
toe, and rear toe. However, each of these adjustments
are related to each other. For example, when you adjust
camber, the toe will change. Therefore, you must adjust
the front wheel alignment whenever you adjust camber
or toe.
For proper inspection and adjustment of the wheel
alignment, do these checks: 1. Release the parking brake to avoid an incorrect measurement.
2. Make sure the suspension is not modified.
3. Make sure the fuel tank is full, and that the spare tire, the jack, and the tools are in place on the
vehicle.
4. Check the tire size and tire pressure.
5. Check the runout of the wheels and tires (see page 18-9). 6. Check the suspension ball joints (Hold a tire with
your hands, and move it up and down and right and
left to check for movement).
7. Before doing alignment inspections, be sure to remove all extra weight from the vehicle, and no
one should be inside the vehicle (driver or
passengers).
8. Bounce the vehicle up and down several times to stabilize the suspension.
9. Check that the steering column is set at the center tilt and telescopic position.
Use commercially available computerized four wheel
alignment equipment to measure wheel alignment
(caster, camber, toe, and turning angle). Follow the
equipment manufacturer’s instructions. 1. Check the caster angle.
 If the measurement is within specifications,measure the camber angle.
 If the measurement is not within specifications, check for bent or damaged suspension
components.
(cont’d)
08/08/21 14:56:45 61SNR030_180_0005
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Suspension
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Front and Rear Suspension . 18-2
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Front Suspension . 18-14
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Rear Suspension . 18-31
TPMS (Tire Pressure Monitoring System) (’08-09 Models)
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Component Location Index . 18-48
General Troubleshooting Information . 18-49
Memorizing the Tire Pressure Sensor ID . 18-52
Tire Pressure Sensor Location . 18-53
DTC Troubleshooting Index . 18-55
Symptom Troubleshooting Index . 18-56
System Description . 18-57
Circuit Diagram . 18-61
DTC Troubleshooting . 18-63
Symptom Troubleshooting . 18-71
TPMS Control Unit Replacement . 18-75
Tire Pressure Sensor Replacement . 18-76
08/08/21 14:58:20 61SNR030_180_0047
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18-48TPMS
Component Location Index
TIRE PRESSURE SENSOR
DATA LINK CONNECTOR (DLC) UNDER-DASH FUSE/RELAY BOX
TPMS CONTROL UNIT
TIRE PRESSURE SENSOR
TIRE PRESSURE SENSOR
TIRE PRESSURE SENSOR UNDER-HOOD FUSE/RELAY BOX
Replacement, page 18-76 Replacement, page 18-75
Replacement, page 18-76
Replacement, page 18-76
Replacement, page 18-76
08/08/21 14:58:21 61SNR030_180_0048
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System Indicator
The Low Tire Pressure Indicator
The TPMS Indicator DTC 11, 13, 15, 17
Tire Pressure Changing by Temperature
18-49
General Troubleshooting Information
Low Tire Pressure
Indicator
TPMS
Indicator
20
0 20 4060
43 2 6 8 104 1 40
psi
(kgf/cm , kPa)
38
(2. 6, 260)
35
(2. 4, 240)
32
(2. 2, 220)
29
(2. 0, 200)
26
(1. 8, 180)
23
(1. 6, 160)
20
(1. 4, 140)
2
The TPMS (tire pressure monitoring system) has the
low tire pressure indicator and the TPMS indicator.
 If the system detects low pressure in any of the four tires, the low tire pressure indicator comes on.
 When this happens, inflate the air and test-drive the vehicle at 45 km/h (28 mph) or more for at least 1
minute, and the low tire pressure indicator will go off.
 If the control unit detects a problem in the system during an indication of low tire pressure, it turns off
the low tire pressure indicator, stores the DTC(s), and
turns on the TPMS indicator.
 If a problem is detected in the system, the TPMS indicator comes on.
 If low tire pressure and a problem in the system are detected, only the TPMS indicator comes on.
If the system is OK, the TPMS indicator and the low
tire pressure indicator should come on when you turn
the ignition switch to ON (II), and then go off 2
seconds later. If they don’t, there is a problem with
the system. If the system detects low pressure in any of the four
tires, the low tire pressure indicator comes on, and the
control unit sets one or more of these codes: DTC 11,
13, 15, 17. When the tire pressure returns to normal,
and the TPMS control unit receives the normal pressure
signal from the tire pressure sensor, the control unit
turns off the indicator. However TPMS control unit still
retains the DTC(s).
NOTE: It is necessary to test-drive the vehicle at
45 km/h (28 mph) or more for at least 1 minute so that
tire pressure sensor transmits the signal.
The pressures increase slightly as the temperature in
the tires rises during driving.
Pressures can also increase or decrease slightly with
changes in outside air temperature.
A temperature change of about 10 °C (18 °F) changes
tire pressure by about 10 kPa (0.1 kgf/cm , 1.5 psi). If the
temperature drops, tire pressure could decrease just
enough to turn on the low tire pressure indicator, but
later, the tire temperature could increase enough to
turn the indicator off. To resolve a complaint of such
intermittent indications, confirm and clear the stored
DTC(s) and check the tire pressures. Then explain to the
client how temperature changes can affect the system.
(cont’d)
2
08/08/21 14:58:22 61SNR030_180_0049
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Problems That Are Not System Faults
How a Diagnostic Trouble Code (DTC) is Set How to Troubleshoot DTCs
18-50TPMS
General Troubleshooting Information (cont’d)
 Tire Sealant
Fluid sealant used to repair a punctured tire can
damage the tire pressure sensor mounted on each
wheel. It can prevent the system from detecting the
correct tire pressure, which sets a DTC 11, 13, 15, or
17 even t hough the system is normal.
 Cold Weather When the weather is extremely cold, about 40 °C
( 40 °F) or colder, the output of the lithium battery in
each tire pressure sensor may drop far enough that
the control unit sets a DTC for low battery voltage (31,
33, 35, or 37) even t hough the system is normal.
 Non-TPMS Wheels (Including Spare Tire) Vehicles equipped with TPMS must use wheels made
for the system. Every TPMS wheel has an exclusive
mark; do not use any other type of wheel.
When a flat tire is replaced with the spare tire, the
TPMS indicator comes on (DTC 32, 34, 36, or 38)
because the system is no longer receiving the signal
from the flat tire’s transmitter.
This is not a problem with the spare tire.
 When the system detects a problem, the TPMS control unit sets a code, but shifts to fail-safe mode,
and does not alert the driver to low tire pressures.
 If the TPMS control unit loses power, or fails, the TPMS indicator comes on, but no DTCs are set.
 The memory can hold all the DTCs that could possibly be set. However, when the same DTC is
detected more than once, the most recent one
overwrites the previous one, so only the latest DTC of
each type is stored.
 DTCs are indicated in ascending order, not in the order they occurred.
 Set DTCs are stored in the EEPROM (nonvolatile memory), and cannot be cleared by disconnecting the
battery. To clear a DTC, connect the HDS (Honda
Diagnostic System) to the data link connector (DLC),
and follow the screen prompts. DTC troubleshooting procedures assume the cause of
the problem is still present and the TPMS indicator is
still on. Do not use a troubleshooting procedure unless
the system has set the DTC listed for it.
NOTE: For DTCs 11, 13, 15, and 17 (tire low pressure),
the TPMS indicator comes on only if the DTCs are
caused by a system problem rather than low tire
pressure.
1. Ask the client to describe the conditions when the indicator came on, and try to reproduce the same
conditions for troubleshooting. Find out if the client
checked and/or adjusted tire pressures since the
indicator came on.
2. If an indicator does not come on during the test- drive, check for loose terminals, poor contact due
to damaged terminals, etc. Before you start
troubleshooting.
3. After troubleshooting, repair and clear the DTCs, and test-drive the vehicle. Make sure no indicators
come on.
4. Check for DTCs from other control units that are connected via the F-CAN. If there are DTCs that are
related to the F-CAN, the most likely cause was that
the ignition switch was turned to ON (II) with the
TPMS control unit connector disconnected. Clear
the DTCs. Check for PGM-FI and TPMS codes, and
troubleshoot those first.
08/08/21 14:58:22 61SNR030_180_0050
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