Poor Acceleration - Kia Sorento 2001 General Information Manual

5 Poor acceleration at drive-away
Description Engine speed increases normally but vehicle speed slowly increases during acceleration
(TROUBLESHOOTING HINTS)
1. ATF level low or high
2. Throttle position sensor malfunction or improperly adjusted
3. Line pressure incorrect
4. Torque converter clutch solenoid malfunction
5. Engine stall speed incorrect
Step
Check that no diagnostic trouble codes exist by
1
retrieving DTC's with a scan tool
Are ATF level and condition OK?
Do transaxle seals, sealant, and gaskets
prevent leakage?
Clear pink : Normal condition
2 Dark or black (with friction material) : Worn
powertrain components
Milky pink : Water contamination
Light to dark brown (oxidation) : Overheated
or oid fluid
Are measurements at TCM terminal OK?
3
Is line pressure OK?
Line pressure
Pis (kPa, kg/cm²)
4
Are resistance of torque converter clutch
solenoid valve and output voltage of TCm
terminal H-01/4 OK?
Vb : Battery voltage
5
Solenoid valve resistance : 14~18Ω
Inspection
Yes Go to next step.
Diagnostic trouble code(s) displayed on scan
tool.
No • Check for cause of diagnostic trouble
code(s)
If problem remains, go to next step.
Yes Go to next step.
If ATF level is not OK, add fluid as necessary.
If ATFcondition is not OK, repair as follows :
• condition - Overhaul transaxle and
repair or replace parts as necessary ; then
go to next step
No
• or conditions - Replace ATF ; then go
to next step
If there is leakage, repair or replace parts as
necessary and/or replace transaxle ; then go
to next step.
Yes Go to next step.
Check for malfunctioning parts
• Throttle position (TP) sensor.
No
• Wiring
Yes Go to next step.
Check linear solenoid valve.
If line pressure is not within specifications after
No
linear solenoid inspection, replace control
valve body assembly.
Yes Go to next step.
If resistance is OK but Voltage is not, check
No
wiring and/or replace TCM.
Action