Content .. 155 156 157 158 ..

Honda Ridgeline. Manual - part 157

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Symptom

Probable cause(s)

Notes

14-13

Symptom Troubleshooting Index

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•
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•

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•

•

•
•

•

•
•

•
•
•
•
•

•

•
•

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•
•

•

When you turn the
ignition switch to
ON (II), the D
indicator comes on
and stays on in all
shift lever
positions, or it
never comes on at
all

F-CAN communication line error
Gauge control module defective
PCM defective

Check the F-CAN communication line for a DTC
(see page 11-3).
Check the indicator drive circuit in the gauge
control module by using the gauge control
module self-diagnostic function (see page
22-245).

A/T gear position
indicator does not
come on while the
shift lever is in that
position

F-CAN communication line error
Gauge control module defective
PCM defective
Transmission range switch
defective

Transmission still
shifts into 4th or
5th gear in D even
though the D3
switch is pushed

A problem in the D3 switch circuit

Check the D3 switch circuit (see page 14-270).
Check the D3 switch (see page 14-276).

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 page 11-248).
Troubleshoot the shift lock system circuit
(see page 14-282).
Test the shift lock solenoid (see page 14-286).
Inspect the transmission range switch (see page
14-272).

Ignition switch
cannot be moved
from ACC (I) to
LOCK (0) (key is
pushed in, shift
lever in P)

A problem in the key interlock system
of the interlock system

Check the interlock system - key interlock system
circuit (see page 14-285).

When you turn the
ignition switch to
ON (II), the D3
indicator comes on
and stays on in all
shift lever
positions, or it
never comes on at
all

Gauge control module defective
PCM defective
F-CAN circuit defective

Check the indicator drive circuit in the gauge
control module by using the gauge control
module self-diagnostic function (see page
22-245).
Check for a short or an open in F-CAN wires
between PCM and gauge control module.

(cont’d)

Symptom

Probable cause(s)

Notes

14-14

Automatic Transmission

Symptom Troubleshooting Index (cont’d)

•
•
•

•

•
•

•

•
•

•

When you turn the
ignition switch to
ON (II), the A/T
TEMP indicator
comes on and
stays on or never
comes on at all

Gauge control module defective
PCM defective
F-CAN circuit defective

Check the indicator drive circuit in the gauge control
module by using the gauge control module self-
diagnostic function (see page 22-245).
Check for a short or an open in F-CAN wires between
PCM and gauge control module.

Engine runs, but
vehicle does not
move in any gear

1.
2.

4.
5.

6.
7.

10.

11.

Low ATF level
Shift cable broken or out of
adjustment
Connection between shift
cable and transmission or
body worn
ATF pump worn or binding
Regulator valve stuck or
spring worn
ATF strainer clogged
Mainshaft worn or
damaged
Final gears worn or
damaged
Park mechanism defective
Transmission-to-engine
assembly error
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,
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 the ATF
pump seizure.
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.

Vehicle moves in R,
but not in D, 2, or 1

1.
2.

1st accumulator defective
Idler gears worn or
damaged
1st clutch defective

Check the 1st 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 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 plates are worn or damaged,
replace them as a set. If the wave-plate height is out
of tolerance, replace the wave-plate. If they are OK,
adjust the clearance with the clutch end-plate.

Symptom

Probable cause(s)

Notes

14-15

•
•

•

•
•

•

•
•

•

Vehicle moves in 2
and R, but not in D
or 1

2.
3.

1st gear one-way clutch
defective
1st gears worn or damaged
1st clutch defective

Check the 1st 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
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
plates are worn or damaged, replace them as a set. If
the wave-plate height is out of tolerance, replace the
wave-plate. If they are OK, adjust the clearance with the
clutch end-plate.

Vehicle moves in D,
2, and R, but not in
1

1st-hold accumulator
defective
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
O-rings. Check the spring retainer for wear and damage.
Inspect the clearance between the 1st-hold clutch 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 plates are worn or damaged, replace them as a set.
If the wave-plate height is out of tolerance, replace the
wave-plate.

Vehicle moves in D,
1, and R, but not in
2

1.
2.

2nd accumulator defective
2nd clutch defective

Check the 2nd clutch pressure.
Inspect the secondary shaft and 2nd clutch assembly
for wear and damage.
Inspect the clutch piston, clutch piston check valve, and
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
plates are worn or damaged, replace the discs and
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.

(cont’d)

Symptom

Probable cause(s)

Notes

14-16

Automatic Transmission

Symptom Troubleshooting Index (cont’d)

•
•

•

•
•

•

Vehicle moves in D,
2, and 1, but not in
R (or moves
forward in R)

1.
2.
3.
4.
5.
6.

Shift fork shaft stuck
Modulator valve defective
Reverse CPC valve defective
5th accumulator defective
5th clutch defective
Reverse gears worn or damaged

Check the line pressure and 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 debris. If no cause for the
contamination is found, replace the torque
converter.
Inspect the reverse selector gear teeth chamfers,
and inspect the engagement teeth chamfers of
the countershaft 5th gear and reverse gear.
Replace the reverse gears and the reverse
selector if they are worn or damaged. If the
transmission makes clicking, grinding, or
whirring noises, also replace the mainshaft 5th
gear, reverse idler gear, and countershaft 5th
gear.
Inspect the clutch piston, clutch piston check
valve, and 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 plates are worn or damaged, replace the
discs and 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.

Poor acceleration;
flares when
starting off in D
and R

1.
2.

3.
4.

5.
6.

Low ATF level
Shift cable broken or out of
adjustment
ATF pump worn or binding
Regulator valve stuck or spring
worn
ATF strainer clogged
Torque converter check valve
defective

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.
Check the line pressure.
Check the ATF strainer for debris. If the strainer is
clogged, find the damaged components that
caused the debris.
Improper alignment of the ATF pump and the
torque converter housing may cause the ATF
pump seizure. The symptom is mostly an
rpm-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 the ATF pump seizure if not detected. Use the
proper tools.

Content .. 155 156 157 158 ..