2006 ACURA CSX check engine

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DTC U0155:
YES
NO
YES
NO
YES
NO YES
NO
14-207
F-CAN Malfunction (PCM-Gauge
Control Module)
NOTE: Before you troubleshoot, record all freeze data
and any on-board snapshot with the HDS, and review
General Troubleshooting Information (see page 14-3).
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs in the PGM-FI SYSTEM with the HDS.
Go to the DTC U0155 troubleshooting in the
PGM-FI SYSTEM (see page 11-188).
Go to step 4.
4. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Go to step 5.
Intermittent failure, the system is OK at this
time. If any other Temporary DTCs or DTCs were
indicated, go to the indicated DTC’s
troubleshooting.
5. Update the PCM if it does not have the latest software (see page 11-227), or substitute a known-
good PCM (see page 11-7).
6. Start the engine, and wait for at least 2 minutes.
7. Check for Temporary DTCs or DTCs in the A/T SYSTEM with the HDS.
Check for poor connections or loose
terminals between the gauge control module and
the PCM. If the PCM was updated, substitute a
known-good PCM (see page 11-7), then go to step
6. If the PCM was substituted, go to step 1.
Go to step 8. 8. Monitor the OBD STATUS for U0155 in the DTCs
MENU with the HDS.
If the PCM was updated, troubleshooting is
complete. If the PCM was substituted, replace the
original PCM (see page 11-228). If any other
Temporary DTCs or DTCs were indicated in step 7,
go to the indicated DTC’s troubleshooting.
If the HDS indicates FAILED, check for poor
connections or loose terminals between the gauge
control module and the PCM. If the PCM was
updated, substitute a known-good PCM (see page
11-7), then go to step 6. If the PCM was substituted,
go to step 1. If the HDS indicates NOT COMPLETED,
go to step 6.
Is DT C U0155 indicated in the PGM-F I SY ST EM?
Is DT C U0155 indicated in the A/ T SY ST EM?
Is DT C U0155 indicated in the A/ T SY ST EM? Does the HDS ind icate PASSED?
08/08/21 14:45:31 61SNR030_140_0209
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Upshift: D Position
APP sensor A voltage: 1.3 V
APP sensor A voltage: 2.5 V
Fully-opened throttle
APP sensor A voltage: 4.4 V
Downshift: D Position APP sensor A voltage: 1.3 V
APP sensor A voltage: 2.5 V
Fully-opened throttle
APP sensor A voltage: 4.4 V
14-209
14. Review each snapshot individually, and compare the Shift Control, the APP Sensor A Voltage, and
the Vehicle Speed to the following table.
1st 2nd 14 18 km/h (9 11 mph)
2nd 3rd 29 35 km/h (18 22 mph)
3rd 4th 41 49 km/h (25 30 mph)
4th 5th 62 72 km/h (39 45 mph)
Lock-up ON 48 56 km/h (30 35 mph)
1st 2nd 24 30 km/h (15 19 mph)
2nd 3rd 49 59 km/h (30 37 mph)
3rd 4th 81 93 km/h (50 58 mph)
4th 5th 155 171 km/h (96 106 mph)
Lock-up ON 177 193 km/h (110 120 mph)
1st 2nd 54 64 km/h (34 40 mph)
2nd 3rd 100 112 km/h (62 70 mph)
3rd 4th 148 162 km/h (92 101 mph)
Lock-up OFF 46 54 km/h (29 34 mph)
5th 4th 47 57 km/h (29 35 mph)
4th 3rd 29 35 km/h (18 22 mph)
3rd1st 713km/h(48mph)
Lock-up OFF 106 118 km/h (66 73 mph)
Lock-up OFF 173 189 km/h (108 117 mph)
5th 4th 182 198 km/h (113 123 mph)
4th 3rd 123 137 km/h (76 85 mph)
3rd 2nd 84 96 km/h (52 60 mph)
2nd 1st 42 52 km/h (26 32 mph)
15. Drive the vehicle in 4th or 5th gear with the shift lever in S with the sequential sportshift mode, then
decelerate and downshift to 2nd gear by pressing
the paddle shifter (downshift switch). The
vehicle should immediately begin to slow down
from the engine braking, then slow to a stop.
16. Shift to R, accelerate from a stop at full throttle momentarily, and check for abnormal noise and
clutch slippage. 17. Park the vehicle on a slope (about 16-degrees),
apply the brake, and shift into P. Release the brake;
the vehicle should not move.
NOTE: Always use the brake to hold the vehicle,
when stopped on an incline in gear. Depending on
the grade of the incline, the vehicle could roll
backwards if the brake is released.
08/08/21 14:46:41 61SNR030_140_0211
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Pressure Fluid Pressure
Standard Service Limit Problem Probable causes
14-214Automatic Transmission
Pressure Test (cont’d)
27. Bring the engine back to an idle, then apply the
brake pedal to stop the wheels from rotating.
28. Shift to R, then release the brake pedal. Measure the 4th clutch pressure at the 4th clutch pressure
inspection port (F) while holding the engine speed
at 2,000 rpm.
4th clutch
(F) in R 890 970 kPa
(9.1 9.9 kgf/cm ,
130 140 psi) 840 kPa
(8.6 kgf/cm ,
120 psi)
29. Turn the engine off, then disconnect the A/T oil pressure gauge from the 3rd, 4th, and 5th clutch
pressure inspection ports.
30. Install the sealing bolts in the 3rd, 4th, and 5th clutch pressure inspection ports with new sealing
washers, and tighten the bolts to 18 N·m (1.8 kgf·m,
13 lbf·ft). Do not reuse the old sealing washers. 31. If the pressures are out of the service limit, the
problems and probable causes are listed in the
table.


















No or low line
pressure
Torque converter
ATF pump
Regulator valve
Torque converter
check valve
Clogged ATF strainer
No or low 1st clutch
pressure 1st clutch
O-rings
No or low 2nd clutch
pressure 2nd clutch
O-rings
No or low 3rd clutch
pressure 3rd clutch
O-rings
No or low 4th clutch
pressure 4th clutch
O-rings
No or low 5th clutch
pressure 5th clutch
O-rings
No or low 4th clutch
pressure in R Servo valve
4th clutch
O-rings
32. Install the splash shield.
33. Check the ATF level (see page 14-231).
22
08/08/21 14:46:43 61SNR030_140_0216
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14-231
ATF Level Check
A
A
B
ATF
NOTE: Keep all foreign particles out of the transmission. 1. Park the vehicle on the level ground.
2. Warm up the engine to normal operating temperature (the radiator fan comes on), and turn
the engine off. Do not allow the engine to warm up
more than two cycles of the cooling fan.
NOTE: Check the ATF level within 60 90 seconds
after turning the engine off. Higher ATF level may
be indicated if the radiator fan comes on twice or
more.
3. Remove the ATF dipstick (yellow loop) (A), and wipe it with a clean cloth.
4. Insert the dipstick into the transmission.
5. Remove the dipstick and check the ATF level. It should be between the upper mark (A) and the
lower mark (B). 6. If the ATF level is below the lower mark, check for
fluid leaks at the transmission, the hoses, and the
line joints. If a problem is found, fix it before f illing
the transmission with ATF.
NOTE: If the vehicle is driven when the ATF level is
below the lower mark, one or more of these
symptoms may occur:  The transmission damage.
 The vehicle may not move in any gear.
 The vehicle may accelerates poorly, and flares when starting off in D, S, and R.
 Vibration when the engine is idling.
7. If the ATF level is above the upper mark, drain the
ATF to proper level (see step 3 on page 14-232).
NOTE: If the vehicle is driven when the ATF level is
above the upper mark, the vehicle may creep
forward while in N, or have problems shifting.
8. If necessary, fill the transmission with ATF through the dipstick hole to bring the fluid level to midway
between the upper mark and the lower mark of the
dipstick. Do not fill the fluid above the upper mark.
Always use genuine Acura ATF-Z1 automatic
transmission fluid (ATF). Using a non-Acura ATF
can affect shift quality.
9. Insert the dipstick back into the transmission with the letters ‘‘ATF’’ pointing toward the front of the
vehicle.
08/08/21 14:46:52 61SNR030_140_0233
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Automatic Transmission Fluid Capacity:
2.9 L (3.1 US qt) at change
6.5 L (6.9 US qt) at overhaul
14-232 Automatic Transmission
ATF Replacement
A
18 x 1.5 mm
49 N·m
(5.0 kgf·m,
36 lbf·ft)
B
ATF
A
NOTE: Keep all foreign particles out of the transmission. 1. Park the vehicle on the level ground.
2. Warm up the engine to normal operating temperature (the radiator fan comes on), and turn
the engine off.
3. Remove the drain plug (A), and drain the automatic transmission fluid (ATF).
4. Reinstall the drain plug with a new sealing washer (B).
5. Refill the transmission with ATF into the dipstick hole to bring the fluid level between the upper
mark and the lower mark of the dipstick. Always
use Acura ATF-Z1 automatic transmission fluid
(ATF). Using a non-Acura ATF can affect shift
quality.
6. Check that the ATF level is between the upper mark
and the lower mark of the dipstick.
7. Insert the dipstick back into the transmission with the letters ‘‘ATF’’ pointing toward the front of the
vehicle. 8. If the maintenance minder required to replace the
ATF, reset the maintenance minder (see page 3-4),
and this procedure is complete. If the maintenance
minder did not require you to replace the ATF, go
to step 9.
9. Connect the HDS to the DLC (A) located under the driver’s side of the dashboard.
10. Turn the ignition switch to ON (II). Make sure the HDS communicates with the PCM. If it does not, go
to the DLC circuit troubleshooting (see page
11-204).
11. Select BODY ELECTRICAL with the HDS.
12. Select ADJUSTMENT in the GAUGES MENU with the HDS.
13. Select RESET in the MAINTENANCE MINDER MENU with the HDS.
14. Select RESETTING THE ATF with the HDS.
NOTE: If you changed the engine oil at the same
time with the ATF, select RESETTING THE ENGINE
OIL LIFE AND ATF with the HDS instead.
Replace.
08/08/21 14:46:53 61SNR030_140_0234
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14-252Automatic Transmission
Transmission Installation (cont’d)
54. Refill the transmission with ATF (see step 5 on page
14-232).
55. Install the battery tray, the battery base, and the resonator.
56. Install the air cleaner assembly (see page 11-345) and the intake air duct (see page 11-348).
57. Install the front grille cover (see page 20-163).
58. Install the under-cowl lower panel and the cowl cover (see page 20-163).
59. Do the battery installation procedure (see page 22-69).
60. Install the front wheels.
61. Set the parking brake. Start the engine, and shift the transmission through all positions three times.
62. Check the shift lever operation, the A/T gear position indicator operation, and the shift cable
adjustment.
63. Check and adjust the front wheel alignment (see page 18-5).
64. Install the splash shield.
65. Start the engine with the shift lever in P or N, and warm it up to normal operating temperature (the
radiator fan comes on). Turn off the engine, and
check the ATF level (see page 14-231).
66. Road-test the vehicle (see page 14-208).
08/08/21 14:48:50 61SNR030_140_0254
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14-268A/T Gear Position Indicator
Transmission Range Switch Replacement (cont’d)
A
C
B
6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft) 6x1.0mm
12 N·m (1.2 kgf·m, 8.7 lbf·ft)A
7. Install the transmission range switch (A) gently on
the selector control shaft (B) while holding it in the
N position with the 2.0 mm (0.08 in.) blade (C).
8. Tighten the bolts on the transmission range switch while you continue to holding the N position. Do
not move the transmission range switch when
tightening the bolts. Remove the feeler gauge. 9. Check the connectors for rust, dirt, or oil, clean or
repair if necessary, then connect the connector
securely.
10. Turn the ignition switch to ON (II). Move the shift lever through all positions, and check the
transmission range switch synchronization with the
A/T gear position indicator.
11. Check that the engine will start with the shift lever in P and N, and will not start in any other shift lever
position.
12. Check that the back-up lights come on when the shift lever is in R.
13. Allow the front wheels to rotate freely, then start the engine, and check the shift lever operation.
14. Install the transmission range switch cover (A).
08/08/21 14:49:03 61SNR030_140_0270
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Total grease quantity
Outboard joint:K20Z2 engine model: 120 140 g (4.2 4.9 oz)
K20Z3 engine model: 110 130 g (3.8 4.5 oz)
16-18Driveline/Axle
Driveshaft Reassembly (cont’d)
10 cm
(4 in.)
A
B A A
B
C A
A
7. To completely seat the outboard joint, pick up the driveshaft and joint, and tap or hit the assembly
onto a hard surface from a height of about 10 cm
(4 in.).
NOTE: Do not use a hammer as excessive force
may damage the driveshaft. Be careful not to
damage the threaded section (A) of the outboard
joint.
8. Check the alignment of the paint mark (A) you made with the outboard joint end (B).
To avoid driveshaft and vehicle damage, the
shaft must be all the way into the outboard
joint to ensure the stop ring is properly
seated. 9. Pack the outboard joint (A) with the remaining
grease included in the new outboard boot set.
10. Fit the boot ends (A) onto the driveshaft (B) and outboard joint (C). Bleed any excess air from the
boot by inserting a flat-tipped screwdriver between
the boot and the joint.
Use the grease included
in the outboard boot set.
08/08/21 14:51:29 61SNR030_160_0018
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