AUTOMATIC TRANSAXLE DIAGNOSIS
TSB Revision
AUTOMATIC TRANSAXLE
23A-27
8
Use the scan
tool MB991958
(MUT-III sub
assembly) to
stop the
INVECS-II
function
Transmission
range: D (on a
flat and straight
road)
(1) Accelerate from
1st gear to 4th gear.
(2) While driving at
60 km/h (37 mph) in
4th gear, downshift to
3rd gear
(3) While driving at
40 km/h (25 mph) in
3rd gear, downshift to
2nd gear
(4) While driving at
20 km/h (12 mph) in
2nd gear, downshift
to 1st gear
Data list No.63
(1) 1st
→ 2nd → 3rd
→ 4th
(2) 4th
→ 3rd
(3) 3rd
→ 2nd
(4) 2nd
→ 1st
Does not
shift from 1
to 2 or 2 to
1
31
Low-reverse
solenoid valve
system
(
P.23A-188
).
33
Second solenoid
valve system
(
P.23A-211
).
41
1st gear incorrect
ratio (
P.23A-244
).
42
2nd gear incorrect
ratio (
P.23A-244
).
Does not
shift from 2
to 3 or 3 to
2
33
Second solenoid
valve system
(
P.23A-211
).
34
Overdrive solenoid
valve system
(
P.23A-222
).
42
2nd gear incorrect
ratio (
P.23A-244
).
43
3rd gear incorrect
ratio (
P.23A-244
).
Does not
shift from 3
to 4 or 4 to
3
32
Underdrive
solenoid valve
system
(
P.23A-200
).
33
Second solenoid
valve system
(
P.23A-211
).
43
3rd gear incorrect
ratio (
P.23A-244
).
44
4th gear incorrect
ratio (
P.23A-244
).
9
Transmission
range: N (on a
flat and straight
road)
Monitor data list
No.22 and No.23
with the scan tool
MB991958 (MUT-III
sub assembly)
(1) Move selector
lever to R range,
drive at constant
speed of 10 km/h
(6.2 mph)
The ratio between
data list No.22 and
No.23 should be the
same as the gear
ratio when reversing.
Does not
match
22
Input shaft speed
sensor system
(
P.23A-70
).
23
Output shaft speed
sensor system
(
P.23A-91
).
46
Reverse gear
incorrect ratio
(
P.23A-244
).
STEP CONDITION
BEFORE
TEST/OPERATION
TEST/OPERATION
STANDARD
INSPECTION
ITEM
DTC INSPECTION
PROCEDURE PAGE