Acura RL. Instruction — page 212

Inspect the transmission range
switch (see
TRANSMISSION RANGE
SWITCH TEST
).

When you press the paddle
shifter + (upshift switch) in M,
the transmission does not upshift
gears

A problem in the paddle shifter +
(upshift switch) circuit

Check the paddle shifter + (upshift
switch) circuit (see PADDLE
SHIFTER + (UPSHIFT
SWITCH) CIRCUIT
TROUBLESHOOTING
).

When you press the paddle
shifter — (downshift switch) in M,
the transmission does not
downshift gears

A problem in the paddle shifter —
(downshift switch) circuit

Check the paddle shifter —
(downshift switch) circuit (see
PADDLE SHIFTER —
(DOWNSHIFT SWITCH)
CIRCUIT
TROUBLESHOOTING
).

Shift lever cannot be moved
from P while you are pressing on
the brake pedal

Accelerator pedal position
sensor circuit

Accelerator pedal position
sensor defective

Brake pedal position switch
circuit

Brake pedal position switch
defective

Shift lock solenoid
defective

Shift lock solenoid control
circuit

Shift lock mechanism
defective

Throttle body defective

Transmission range switch
ATP P switch stuck OFF

Transmission range switch
ATP P switch line opened

Inspect the APP sensor signal
(see APP SENSOR SIGNAL
INSPECTION
).

Troubleshoot the shift lock
system circuit (see SHIFT
LOCK
SYSTEM/REVERSE
LOCK SYSTEM CIRCUIT
TROUBLESHOOTING
).

Test the shift lock solenoid
(see SHIFT LOCK
SOLENOID TEST
).

Inspect the transmission range
switch (see
TRANSMISSION RANGE
SWITCH TEST
).

Shift lever cannot pass through R
from N

A problem in the reverse lock
system of the interlock system

Check the interlock system — reverse
lock system circuit (see SHIFT
LOCK SYSTEM/REVERSE
LOCK SYSTEM CIRCUIT
TROUBLESHOOTING
).

Ignition switch cannot be moved
from ACCESSORY (1) to
LOCK (0) (key is pushed in, the
shift lever in P)

A problem in the key interlock
system of the interlock system

Check the interlock system — key
interlock system circuit (see KEY
INTERLOCK SYSTEM
CIRCUIT

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission — RL

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© 2005 Mitchell Repair Information Company, LLC.

TROUBLESHOOTING ).

HDS does not communicate with
the PCM or the vehicle

DLC circuit

Troubleshoot the DLC circuit; ’05-
07 models (see ’05-07 MODELS ),
’08 model (see ’08 MODEL ).

Engine runs, but vehicle does not
move in any gear

1. Low ATF level

2. Shift cable broken or out of

adjustment

3. Connection between shift

cable and transmission or
body is worn

4. ATF pump worn or binding

5. Regulator valve stuck or

spring worn

6. ATF strainer clogged

7. Mainshaft worn or damaged

8. Final gears worn or

damaged

9. Park mechanism defective

10. Transmission-to-engine

assembly error

11. Axle disengaged

Check the ATF level and
check the ATF cooler lines for
leakage and loose
connections. If necessary,
clean the ATF cooler lines.

Check for a loose shift cable
at the shift lever and the
transmission control lever.

Improper alignment of the
ATF pump and the torque
converter housing may cause
the ATF pump seizure. The
symptoms are mostly an rpm-
related ticking noise or a high
pitched squeak.

Check the line pressure.

Check the ATF strainer for
debris. If the strainer is
clogged, find the damaged
components that caused the
debris.

Inspect the differential pinion
gears for wear. If the
differential pinion gears are
worn, replace the differential
assembly, replace the ATF
strainer, and thoroughly clean
the transmission, and clean
the cooler and lines. Replace
the torque converter.

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

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission — RL

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© 2005 Mitchell Repair Information Company, LLC.

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.

Vehicle moves in R, but not in
D, D3, or 1st in M

1. 1st accumulator defective

2. Idler gears worn or

damaged

3. 1st clutch defective

Check the 1st clutch pressure.

Inspect the secondary shaft
and 1st/1st-hold the clutch
assembly for wear and
damage.

Inspect the clutch piston,
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 plates for wear and
damage, and inspect the
clutch wave-plate height. If
the discs and flat-plates are
worn or damaged, replace the
discs and flat-plates as a set. If
the wave-plate height is out of
tolerance, replace the wave-
plate. If the discs and plates
are OK, adjust the clearance
with the clutch end-plate.

Vehicle moves in D, D3, and R,
but not in 1st in M

1. 1st-hold accumulator

defective

2. 1st-hold clutch defective

Check the 1st-hold clutch
pressure.

Inspect the secondary shaft
and 1st/1st-hold clutch
assembly for wear and
damage.

Inspect the clutch piston,
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 plates for wear and
damage, and inspect the

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission — RL

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© 2005 Mitchell Repair Information Company, LLC.

clutch wave-plate height. If
the discs and the flat-plates
are worn or damaged, replace
the discs and the flat-plates as
a set. If the wave-plate 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.

Vehicle moves in D, D3, and R,
but not in 2nd in M

1. 2nd accumulator defective

2. 2nd clutch defective

Check the 2nd clutch
pressure.

Inspect the secondary shaft
and the 2nd clutch assembly
for wear and damage.

Inspect the clutch piston,
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 plates for wear and
damage, and inspect the
clutch wave-plate height. If
the discs and flat-plates are
worn or damaged, replace the
discs and flat-plates as a set. If
the wave-plate height is out of
tolerance, replace the wave-
plate. If the discs and plates
are OK, adjust the clearance
with the clutch end-plate.

Vehicle moves in D, D3, and M,
but not in R (or moves forward
in R)

1. Shift fork shaft stuck

2. Modulator valve defective

3. Reverse CPC valve

defective

4. 5th accumulator defective

5. 5th clutch defective

6. Reverse gears worn or

damaged

Check the line pressure and
the 5th clutch pressure.

Check for a missing shift fork
bolt on the shift fork shaft.

Check the ATF strainer for
debris. If the ATF strainer is
clogged with particles of steel
or aluminum, inspect the ATF
pump. If the ATF pump is
OK, find the damaged
components that caused the

2007 Acura RL

2005-08 TRANSMISSION Automatic Transmission — RL

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