Acura CSX. Manual — part 235

Symptom

Probable cause(s)

Notes

14-21

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Excessive shock or
flares on 2-3
upshift or 3-2
downshift

1.

2.

3.

4.

5.
6.
7.
8.
9.

A/T clutch pressure control
solenoid valve B defective
A/T clutch pressure control
solenoid valve C defective
3rd clutch transmission fluid
pressure switch defective
Foreign material in separator
plate orifice
2nd accumulator defective
3rd accumulator defective
2nd check ball stuck
2nd clutch defective
3rd clutch defective

Check for a stored DTC, and check for loose
connectors.
Inspect the A/T clutch pressure control solenoid
valve filter/gasket and the O-rings for wear and
damage, and inspect the solenoid valves for
seizure.
Check the 2nd and the 3rd clutch pressures.
Check for a clogged orifice in the separator plate.
If the orifice is clogged, remove it and clean the
separator plate orifice.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
and the retainer seal for wear, damage, and
peeling. Inspect the clearance between the clutch
end-plate and the top disc. If the clearance is out
of tolerance, inspect the clutch discs and the
plates for wear and damage. If the discs are worn
or damaged, replace them as a set. Inspect the
clutch wave-plate height. If the height is out of
tolerance, replace the wave-plate. If the discs and
the plates are OK, adjust the clearance with the
clutch end-plate.
Inspect the 3rd clutch feed pipe. If the 3rd clutch
feed pipe is scored, replace it and the O-ring
under the feed pipe guide.
Replace the secondary shaft if the bushing for the
3rd clutch feed pipe is loose or damaged.
Check the 2nd accumulator piston, the O-ring,
and the springs in the servo body for wear and
damage.
Check the 3rd accumulator piston, the O-ring,
and the springs in the regulator valve body for
wear and damage.

08/08/21 14:37:10 61SNR030_140_0023

Symptom

Probable cause(s)

Notes

14-22

Automatic Transmission

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Excessive shock or
flares on 3-4
upshift or 4-3
downshift

1.

2.

3.

4.
5.
6.
7.

A/T clutch pressure control
solenoid valve B defective
A/T clutch pressure control
solenoid valve C defective
Foreign material in separator
plate orifice
3rd accumulator defective
4th/reverse accumulator defective
3rd clutch defective
4th clutch defective

Check for a stored DTC, and check for loose
connectors.
Inspect the A/T clutch pressure control solenoid
valve filter/gasket and the O-rings for wear and
damage, and inspect the solenoid valves for
seizure.
Check for a clogged orifice in the separator plate.
If the orifice is clogged, remove it and clean the
separator plate orifice.
Check the 3rd and the 4th clutch pressures.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
and the retainer seal (for 3rd clutch only) for wear,
damage, and peeling. Inspect the clearance
between the clutch end-plate and the top disc. If
the clearance is out of tolerance, inspect the
clutch discs and the plates for wear and damage.
If the discs are worn or damaged, replace them
as a set. Inspect the clutch wave-plate height. If
the height is out of tolerance, replace the wave-
plate. If the discs and the plates are OK, adjust
the clearance with the clutch end-plate.
Inspect the 3rd clutch feed pipe. If the 3rd clutch
feed pipe is scored, replace it and the O-ring
under the feed pipe guide.
Replace the secondary shaft if the bushing for the
3rd clutch feed pipe is loose or damaged.
Check the 3rd accumulator piston, the O-ring,
and the springs in the regulator valve body for
wear and damage.

08/08/21 14:37:10 61SNR030_140_0024

Symptom

Probable cause(s)

Notes

14-23

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Excessive shock or
flares on 4-5
upshift or 5-4
downshift

1.

2.

3.

4.
5.
6.
7.

A/T clutch pressure control
solenoid valve B defective
A/T clutch pressure control
solenoid valve C defective
Foreign material in separator
plate orifice
4th/reverse accumulator defective
5th accumulator defective
4th clutch defective
5th clutch defective

Check for a stored DTC, and check for loose
connectors.
Inspect the A/T clutch pressure control solenoid
valve filter/gasket and the O-rings for wear and
damage, and inspect the solenoid valves for
seizure.
Check for a clogged orifice in the separator plate.
If the orifice is clogged, remove it and clean the
separator plate orifice.
Check the 4th and the 5th clutch pressures.
Inspect the clutch piston, the clutch piston check
valve, and the O-rings. Check the spring retainer
for wear and damage. Inspect the clearance
between the clutch end-plate and the top disc. If
the clearance is out of tolerance, inspect the
clutch discs and the plates for wear and damage.
If the discs are worn or damaged, replace them
as a set. Inspect the clutch wave-plate height. If
the height is out of tolerance, replace the wave-
plate. If the discs and the plates are OK, adjust
the clearance with the clutch end-plate.
Inspect the 5th clutch feed pipe. If the 5th clutch
feed pipe is scored, replace it and the O-ring
under the feed pipe guide.
Replace the mainshaft if the bushing for the 5th
clutch feed pipe is loose or damaged.
Check the 4th and the 5th accumulator pistons,
the O-rings, and the springs in the servo body for
wear and damage.

Noise from
transmission in all
shift lever
positions

1.
2.

ATF pump worn or binding
Mainshaft bearing, countershaft
bearing, or secondary shaft
bearing defective

Improper alignment of ATF pump and torque
converter housing may cause ATF pump seizure.
The symptoms are mostly an rpm-related ticking
noise or a high pitched squeak.
Be careful not to damage the torque converter
housing when replacing the main ball bearing.
You may also damage the ATF pump when you
torque down the main valve body. This will result
in ATF pump seizure if not detected. Use the
proper tools.
Install the main seal flush with the torque
converter housing. If you push it into the torque
converter housing until it bottoms out, it will
block the fluid return passage and result in
damage.
Inspect the ATF strainer is clogged with particles
of steel or aluminum. If the ATF strainer is
clogged, replace it, and clean the torque
converter, cooler, and lines.
Inspect the mainshaft, the countershaft, and the
secondary shaft for wear or damage.

08/08/21 14:37:10 61SNR030_140_0025

Symptom

Probable cause(s)

Notes

14-24

Automatic Transmission

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Vehicle does not
accelerate above
50 km/h (31 mph)

Torque converter one-way clutch
defective

Replace the torque converter.

Vibration in all
shift lever
positions

Drive plate defective or transmission
misassembled

Check for a misinstalled/damaged drive plate.
Check that the idle rpm in gear is the specified
idle speed. If the idle speed is correct, adjust the
engine and the transmission mounts.

Shift lever does
not operate
smoothly

1.

2.

3.

Transmission range switch
defective or out of adjustment
Shift cable broken or out of
adjustment
Connection between the shift
cable and transmission or body is
worn

Check for a stored DTC, and check for loose
connectors.
Inspect the transmission range switch for
operation.
Check for a loose shift cable at the shift lever and
the selector control lever.

Transmission does
not shift into P

1.

2.

3.

Shift cable broken or out of
adjustment
Connection between the shift
cable and transmission or body is
worn
Park mechanism defective

Check for a loose shift cable at the shift lever and
the selector control lever.
Check the park pawl spring installation and the
park lever spring installation. If installation is
incorrect, install the spring correctly. Make sure
that the park lever stop is not installed upside
down. Check the distance between the park pawl
shaft and the park lever roller pin. If the distance
is out of tolerance, select and install the
appropriate park lever stop.

Torque converter
clutch does not
disengage

1.
2.

3.

4.
5.

Shift solenoid valve E defective
A/T clutch pressure control
solenoid valve A defective
Torque converter clutch piston
defective
Lock-up shift valve defective
Lock-up control valve defective

Check for a stored DTC, and check for loose
connectors.
Inspect shift solenoid valve E for seizure, and the
O-rings for wear and damage.
Inspect the A/T clutch pressure control solenoid
valve filter/gasket and the O-rings for wear and
damage, and inspect the solenoid valves for
seizure.
Replace the torque converter.
Check the lock-up control valve in the main valve
body for free movement, and check the lock-up
control valve spring for wear and damage.
Check the lock-up shift valve in the regulator
valve body for free movement, and check the
lock-up shift valve spring for wear and damage.

08/08/21 14:37:10 61SNR030_140_0026