Chrysler Conquest 1988 Service Manual page 1187

AUTOMATIC TRANSMISSION
- Troubleshooting
21-65
TROUBLESHOOTING GUIDE
Order
Checking
Test item
1. Oil level gauge
2. Downshift solenoid
3. Manual linkage
4. Inhibitor switch
5. Engine idling rpm
6. Vacuum pressure of vacuum
pipe
7. Operation in each range
8. Creep of car
Procedure
Check gauge for oil level and leakage before and after each
test.
Check for sound of operating solenoid when depressing
accelerator pedal fully with ignition key "ON".
Check by shifting into "P", "R", 'IN", I'D", "2" and "L"
ranges with selector lever.
Check whether starter operates in "N" and "P" ranges
only and whether reverse light operates in "R" range only.
Check whether idle speed meets specifications.
Check whether vacuum pressure is more than 60.0 kPa
(450 mmHg, .177.72 in.Hg) at idle and whether it decreases
with increasing rpm.
~~ec~w~~h~~Ir~S~1Ss,loN?,engages positively by :hifting
~ I, L" and I, N I, ~ I, R
range while'idling with b;ake applied.
Check whether there is any creep in "D", "2", "L" and
"R" ranges.
Stall test 1. Oil pressure before testing
2. Stall test
Road test
3. Oil pressure after testing
1. Slow acceleration,
Ist+ 2nd
2nd + 3rd
3rd + 4th
2. Quick acceleration,
Ist+ 2nd
2nd -+ 3rd
3. Kickdown operation,
4th + 3rd. 3rd -+ 2nd or
2nd+ 1st
4. Shift down,
Da+ Dz+ Dz-+ D,
5. Shift down,
Dz+ lz+ I,
6. Shift down,
D3+2
Measure line pressures in I'D", "2", "L" and "R" range
while idling.
Measure engine speed and line pressure in "D", "2". "L"
and "R" ranges during full throttle operation.
Temperature of torque converter oil used in test should be
from 60 to 100°C (140 to 212°F) i.e., sufficiently warmed
up but not overheated.
Caution
To cool oil between each stall test for "D", "2", "L"
and "R" ranges, idle engine, i.e., rpm at about 1,200
rpm for more than 1 minute in "P" range. Measure-
ment time must not be more than 5 seconds.
Same as item 1.
Check car speeds and engine rpm in shifting up 1 st + 2nd,
2nd -+ 3rd range and 3rd + 4th range and when torque
converter is locked up while running with lever in "D"
range and engine vacuum pressure of about 0 kPa (0
mmHg, 0 in.Hg).
Same as item 1 above except with engine vacuum
pressure of +46.66 kPa (+350 mmHg, +13.78 in.Hg) (i.e.,
in position just kickdown).
Check whether the kickdown operates and measure the
time delays while running at 30,40, 50, 60.70, 100 km/h
(19,25,31,37,43, 62 MPH) in "D3" or "D4" range.
Check car speeds and engine rpm in shifting down from
4th + 3rd + 2nd + 1 st (sequentially) while coasting with
accelerator pedal released in "D4" range and engine
vacuum pressure of about -60.0 kPa (-450 mmHg, -17.72
in.Hg).
Check for shifting down D3+ I2 and engine braking, and
further for shifting down I?+ 1 1 and engine braking after
shifting the lever into "L" range with the accelerator pedal
released and the engine vacuum pressure of about 60 kPa
(450 mmHg, 17.72 in.Hg) while driving at about 50 km/h
(30 MPH) in "D3" range.
Check for quick shifting down D3 + 2 and engine braking,
after shifting the lever into "2" range while driving at about
50 km/h (30 MPH) in "D3" range.
Also, check for locking of the transmission in 2nd gear ratio
regardless of car speed.