power steering ACURA CSX 2006 Service Repair Manual

ItemMeasurement Qualification Specification
2-21
MANUAL
TRANSMISSION
(5-speed)Type Synchronized, five-speed forward, one reverse
Primary reduction Direct 1:1
Gear ratio 1st 3.267
2nd 1.880
3rd 1.212
4th 0.921
5th 0.738
Reverse 3.583
Final reduction Type Single helical gear Gear ratio 4.839
MANUAL
TRANSMISSION
(6-speed) Type Synchronized, six-speed forward, one reverse
Primary reduction Direct 1:1
Gear ratio 1st 3.267
2nd 2.130
3rd 1.517
4th 1.147
5th 0.921
6th 0.659
Reverse 3.583
Final reduction Type Single helical gear Gear ratio 4.765
AUTOMATIC
TRANSMISSION Type Electronically-controlled automatic, five-speed forward, one
reverse three-element torque converter with lock-up clutch
Primary reduction Direct 1:1
Gear ratio 1st 2.651 2nd 1.516
3rd 1.081
4th 0.772
5th 0.566
Reverse 2.000
Final reduction Type Single helical gear Gear ratio 4.562
STEERING Type Electrical power-assisted rack and pinion Overall ratio 13.62
Turns, lock-to-lock 2.65
Steering wheel diameter 360 mm (14.2 in.)
SUSPENSION Type Front Independent strut with stabilizer, coil spring Rear Independent double wishbone with stabilizer, coil spring
Shock absorber Front and rear Telescopic, hydraulic, nitrogen gas-filled
TIRES Size of front and rear tires (’06-08 models) Except TYPE S P205/55R16 89H
TYPE S P215/45R17 87V
Size of front and rear tires
(’09 model) P215/45R17 87V
Size of spare tire (’06-07 models) Except TYPE S T125/70D15 95M TYPE S T135/80R16 101M
Size of spare tire (’08-09 models) T135/80R16 101M
(cont’d)
08/08/21 14:07:26 61SNR030_020_0021
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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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Throttle Body
Brake Pedal Position Switch
Electrical Power Steering (EPS) Signal
Fuel Cutoff Control
Fuel Pump Control
PGM-FI Main Relay 1 and 2
Idle Control System
Fuel Supply System
11-36Fuel and Emissions Systems
System Description (cont’d)
THROTTLE VALVE
THROTTLE POSITION
(TP) SENSOR and
THROTTLE ACTUATOR
The throttle body is a single-barrel side draft type. The
lower portion of the throttle valve is heated by engine
coolant from the cylinder head to prevent icing of the
throttle plate. When the engine is cold, the A/C compressor is on, the
transmission is in gear, the brake pedal is pressed, the
power steering load is high, or the alternator is
charging, the ECM/PCM sends signal to the throttle
position to maintain the correct idle speed.
The brake pedal position switch signals the ECM/PCM
when the brake pedal is pressed.
The EPS signals the ECM/PCM when the power steering
load is high.
During deceleration with the throttle valve closed,
current to the injectors is cut off to improve fuel
economy at engine speeds over 1,000 rpm. Fuel cutoff
control also occurs when the engine speed exceeds
6,900 rpm (K20Z3: 8,200 rpm), regardless of the
position of the throttle valve, to protect the engine from
over-revving. When the vehicle is st
opped, the ECM/
PCM cuts the fuel at engine speeds over 5,000 rpm
(K20Z3: 7,700 rpm). On a cold engine, fuel cut occurs at
a lower engine speed.
When the ignition switch is turned to ON (II), the ECM/
PCM grounds PGM-FI main relay 2 (FUEL PUMP) which
feeds current to the fuel pump for 2 seconds to
pressurize the fuel system. With the engine running, the
ECM/PCM grounds PGM-FI main relay 2 (FUEL PUMP)
and feeds current to the fuel pump. When the engine is
not running and the ignition is turned to ON (II), the
ECM/PCM cuts ground to PGM-FI main relay 2 (FUEL
PUMP) which cuts current to the fuel pump.
PGM-FI main relay 1 is energized whenever the ignition
switch is ON (II), to supply battery voltage to the ECM/
PCM, power to the injectors, and power for PGM-FI
main relay 2 (FUEL PUMP). PGM-FI main relay 2 (FUEL
PUMP) is energized to supply power to the fuel pump
for 2 seconds when the ignition switch is turned to
ON (II), and when the engine is cranking or running.
08/08/21 14:13:39 61SNR030_110_0036
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YES
NO
YES
NO YES
NO
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NO
11-139
24. Compare the value of ECT SENSOR 1 and the
ambient temperature, and the value of ECT
SENSOR 2 and the ambient temperature
individually.
Replace the sensor that differed more than
3 °C (5.4 °F) from the ambient temperature, then go
to step 25.
Check and repair any problems with the
following items. Repair or replace them if needed,
then go to step 25. If every item is OK, go to step
32.
 Engine compression and cylinder leakdown
 VTEC system
 Engine oil
 A/C system
 Power steering
25. Turn the ignition switch to ON (II).
26. Reset the ECM/PCM with the HDS.
27. Do the ECM/PCM idle learn procedure (see page 11-310).
28. Let the engine cool until the value of ECT SENSOR 1 is 50 °C (122 °F) or less.
29. Start the engine, and let it idle for 10 seconds or more.
30. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the CKP sensor, the throttle body, the
MAF sensor/IAT sensor, ECT sensor 1, ECT sensor
2, and the ECM/PCM, then go to step 1.
Go to step 31. 31. Monitor the OBD STATUS for DTC P050B in the
DTCs MENU with the HDS.
Troubleshooting is complete. If any other
Temporary DTCs or DTCs were indicated in step 30,
go to the indicated DTC’s troubleshooting.
If the screen indicates FAILED, check for poor
connections or loose terminals at the CKP sensor,
the throttle body, the MAF sensor/IAT sensor, ECT
sensor 1, ECT sensor 2, and the ECM/PCM, then go
to step 1. If the screen indicates EXECUTING, keep
idling until a result comes on. If the screen
indicates OUT OF CONDITION, go to step 28.
32. 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).
33. Let the engine cool until the value of ECT SENSOR 1 is 50 °C (122 °F) or less.
34. Start the engine, and let it idle for 10 seconds or more.
35. Check for Temporary DTCs or DTCs with the HDS.
Check for poor connections or loose
terminals at the CKP sensor, the throttle body, the
MAF/IAT sensor, 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 33. If the ECM/PCM was substituted,
go to step 1.
Go to step 36.
(cont’d)
Does ei t her sensor d i f f er mor e t han 3 ° C ( 5 .4 ° F )f r om t he ambi ent t emper at ur e?
Is DT C P050B ind icated ? Does t he scr een i nd i cat e PASSE D?
Is DT C P050B ind icated ?
08/08/21 14:18:56 61SNR030_110_0139
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Electronic Control System (cont’d)
S Position Automatic Shift Mode and Sequential Sportshift Mode
14-44 Automatic Transmission
System Description (cont’d)
SHIFT INDICATOR
’’M’’ INDICATOR
The S position has two shifting modes; the automatic shift mode and the sequential sportshift mode. In the S position
automatic shift mode, the transmission upshifts and downshifts automatically from 1st through 4th gear, and the
paddle shifters are ready to be activated to switch to the sequential sportshift mode. In the automatic shift mode, the
shift indicator and the M indicator in the gauge control module (tach) do not come on.
When the paddle shifter (upshift switch) or the paddle shifter (downshift switch) is pressed, the automatic shift
mode is canceled and the sequential sportshift mode comes into operation. The shift indicator displays the number of
the selected gear, and the M indicator comes on. In the sequential sportshift mode, the driver can shift up and down
manually from 1st through 5th gear by using the paddle shifters, much like a manual transmission. The paddle shifters
are installed on the back of the steering wheel, and the driver can shift gears by pressing the paddle shifters without
taking either hand off the steering wheel.
In the sequential sportshift mode, the transmission must be shifted up and down by pressing the paddle shifters.
However, the transmission cannot downshift and stays in the current gear if the paddle shifter is pressed while the
vehicle is coasting at a speed that would cause the engine to over-rev by downshifting the transmission, and the shift
indicator blinks the number of the selected gear several times, then returns to the number of the current gear. If the
vehicle speed reaches an appropriate speed while the shift indicator is blinking the number of the selected gear, the
transmission downshifts and the shift indicator displays the selected gear. The transmission also cannot upshift and
stays in the current gear if the paddle shifter is pressed while driving below an appropriate upshifting speed, the
shift indicator blinks the number of the selected gear several times, then returns to the number of the current gear. If
the vehicle speed reaches an appropriate upshift speed while the shift indicator is blinking the number of the selected
gear, the transmission upshifts and the shift indicator displays the selected gear.
This mode has automatic downshifting areas so the vehicle can run smoothly with more power to cope with upcoming
acceleration. When coasting in 5th gear or 4th gear, the transmission downshifts to the next lower gear if the vehicle
slows down to the programmed speed, or by pressing the brake pedal.
When the transmission decelerates to a stop, the transmission shifts to 1st gear automatically. The transmission can
be shifted to 2nd gear by pressing the paddle shifter while the vehicle is stopped, and the vehicle can start off in 2nd
gear.
The sequential sportshift mode is canceled when moving the shift lever to any position other than S.
08/08/21 14:38:23 61SNR030_140_0046
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14-278A/T Interlock System
Component Location Index
STEERING LOCK ASSEMBLY
KEY INTERLOCK SOLENOID
DATA LINK
CONNECTOR (DLC) PARK PIN SWITCH SHIFT LOCK SOLENOID
POWERTRAIN CONTROL
MODULE (PCM)TRANSMISSION
RANGE SWITCH
Key Interlock System Circuit
Troubleshooting, page 14-285
Key Interlock System Circuit Troubleshooting, page 14-285
Test, page 14-289
Replacement, page 14-269 Shift Lock System Circuit
Troubleshooting, page 14-280
Test, page 14-287
Replacement, page 14-287
08/08/21 14:50:04 61SNR030_140_0280
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Steering
Steering
EPS (Electrical Power Steering) Components
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Special Tools
. 17-2
Component Location Index . 17-3
Steering Wheel Rotational Play Check . 17-4
Power Assist Check . 17-4
Steering Linkage and Gearbox Inspection . 17-5
Steering Wheel Removal . 17-6
Steering Wheel Disassembly/Reassembly . 17-7
Steering Wheel Installation . 17-8
Column Cover Removal and Installation . 17-9
Steering Column Removal and Installation . 17-10
Steering Column Inspection . 17-14
Steering Lock Replacement . 17-14
Rack Guide Adjustment . 17-15
Tie-rod End Ball Joint Boot Replacement . 17-16
Gearbox Mount Cushion Replacement . 17-17
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Component Location Index
. 17-18
General Troubleshooting Information . 17-19
Memorizing the Torque Sensor Neutral Position . 17-22
DTC Troubleshooting Index . 17-23
Symptom Troubleshooting Index . 17-25
System Description . 17-26
Circuit Diagram . 17-30
DTC Troubleshooting . 17-33
Symptom Troubleshooting . 17-60
EPS Motor Removal and Installation . 17-63
Steering Gearbox Removal and Installation . 17-65
Rack End Removal and Installation . 17-79
Rack Guide Removal/Installation . 17-83
EPS Control Unit Removal/Installation . 17-84
08/08/21 14:53:09 61SNR030_170_0002
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17-3
Component Location Index
DRIVER’S AIRBAG
POWER STEERING GEARBOX STEERING COLUMN
STEERING WHEELReplacement,
page 24-188
Rack Guide Adjustment, page 17-15
Tie-rod End Ball Joint Boot Replacement, page 17-16
Gearbox Mount Cushion Replacement, page 17-17
EPS Component, page 17-18 Column Cover Removal and Installation,
page 17-9
Removal and Installation, page 17-10
Inspection, page 17-14
Steering Lock Replacement, page 17-14 Removal, page 17-6
Disassembly/ Reassembly,
page 17-7
Installation, page 17-8
08/08/21 14:53:12 61SNR030_170_0004
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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)
08/08/21 14:53:13 61SNR030_170_0005
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Special Tools Required
Specified return angle: 7 3 °
17-15
Rack Guide Adjustment
AB
07MAA-SL0020A
A
B A
73°
B
44 N·m
(4.5 kgf·m, 33 lbf·ft)
Locknut wrench, 43 mm 07MAA-SL0020A1. Set the wheels in the straight ahead position.
2. Loosen the rack guide screw locknut (A) with the locknut wrench, then remove the rack guide screw
(B).
3. Remove the old sealant from the rack guide screw (A), and apply new sealant (Three Bond 1215 or
Loctite 5699) to the middle of the threads (B).
Loosely install the rack guide screw on the steering
gearbox.
NOTE: If more than 5 minutes has passed after
applying the sealant, remove the old sealant and
residue, and reapply new sealant. 4. Tighten the rack guide screw (A) to 25 N·m
(2.5 kgf·m, 18 lbf·ft), then loosen it.
5. Retighten the rack guide screw to 3.9 N·m (0.4 kgf·m, 2.9 lbf·ft), then back it off to the specified
angle.
6. Hold the rack guide screw stationary with a wrench, and tighten the locknut (B) by hand until it’s fully
seated.
7. Install the locknut wrench on the locknut, and hold the rack guide screw stationary with a wrench.
Tighten the locknut to the specified torque.
8. Check for unusual steering effort through the complete turning range.
9. Check the steering wheel rotational play (see page 17-4) and the power assist (see page 17-4).
08/08/21 14:53:19 61SNR030_170_0016
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