Honda ACCORD HYBRID 2005 Service Manual page 854

Automatic Transmission
S y m p t o m T r o u b l e s h o o t i n g I n d e x (cont'd)
Symptom
Probable cause(s) Notes
The
transmission
does not shift
1. Input shaft (mainshaft)
speed sensor defective
2. Output shaft
(countershaft) speed
sensor defective
3. M o d u l a t o r valve
defective
• Check for a stored DTC, and check for loose connectors.
• Check the line pressure.
Erratic shifting:
fails to shift in D
and D3; starts off
in 5th
1. Shift solenoid valve B
defective
2. Shift valve B defective
• Check for a stored DTC, and check for loose connectors.
• Check the shift solenoid valve for seizure, and inspect the 0 -
rings.
Erratic shifting:
fails to shift into
2; starts off in
4th
1. Shift solenoid valve B
defective
2. Shift valve B defective
• Check for a stored DTC, and check for loose connectors.
• Check the shift solenoid valve for seizure, and inspect the 0 -
rings.
Erratic shifting:
fails to shift in D,
D3, and 1; starts
off in 3rd
1. Shift solenoid valve A
defective
2. Shift valve A defective
• Check for a stored DTC, and check for loose connectors.
• Check the shift solenoid valve for seizure, and inspect the 0 -
rings.
Erratic shifting:
fails to shift into
2; starts off in 1st
1. Shift solenoid valve A
defective
2. Shift valve A defective
• Check for a stored DTC, and check for loose connectors.
• Check the shift solenoid valve for seizure, and inspect the 0 -
rings.
Excessive shock
or flares on all
upshifts and
downshifts
1. A/T clutch pressure
control solenoid valve A
defective
2. Input shaft (mainshaft)
speed sensor defective
3. Output shaft
(countershaft) speed
sensor defective
4. ATF temperature sensor
defective
5. CPC valve A defective
6. Foreign material in
separator plate orifice
• Check for a stored DTC, and check for loose connectors.
• Inspect the A/T clutch pressure control solenoid valve body
gasket and ATF feed pipes for wear and damage. If the A/T
clutch pressure control solenoid valve is stuck, inspect the
CPC valves.
• Inspect the sensor O-rings.
Excessive shock
or flares on 1-2
upshift or 2-1
downshift
1. Shift solenoid valve A
defective
2. Shift solenoid valve C
defective
3. 2nd clutch transmission
fluid pressure switch
defective
4. Foreign material in
separator plate orifice
5. 2nd accumulator
defective
6. 2nd check ball stuck
7. 2nd clutch defective
• Check for a stored DTC, and check for loose connectors.
• Check the shift solenoid valve for seizure, and inspect the 0 -
rings.
• Check for clogged orifice in the transmission fluid pressure
switch connector. If the orifice is c l o g g e d , remove it and
clean the connector.
• Check the 1st and 2nd clutch pressures.
• Inspect the clutch piston, clutch piston check valve, and 0 -
rings. Check the spring retainer for wear and damage.
Inspect the clutch end-plate-to-top-disc clearance. If the
clearance is out of tolerance, inspect the clutch discs and
plates for wear and damage, and inspect the clutch w a v e d -
plate height. If the discs and flat-plates are w o r n or
d a m a g e d , replace the discs and flat-plates as a set. If the
waved-plate height is out of tolerance, replace the w a v e d -
plate. If the discs and plates are OK, adjust the clearance
w i t h the clutch end plate.
14-18