Automatic Transmission/Transaxle: 5A-43
No Gear Shift to 4th Gear
S5JB0A5104020
System Description
TCM does not shift to 5th gear under any of the following condition.
• “3” position switch signal is inputted.
• 4L/N switch is turned ON. (4L mode)
• TCM detects the following DTCs.
DTC, P0722, P0752, P0962, P0963, P0973, P0974, P0976, P0977, P1702
Troubleshooting
WARNING
!
• When performing a road test, select a place where there is no traffic or possibility of a traffic
accident and be very careful during testing to avoid occurrence of an accident.
• Road test should be carried out with 2 persons, a driver and tester, on a level road.
Poor 3
↔
O/D shift,
excessive shock or
slippage
Faulty O/D clutch Inspect. If NG, replace.
Faulty O/D brake Inspect. If NG, replace.
Poor 3
→
2 shift, excessive
shock or slippage
Faulty direct clutch Inspect. If NG, replace.
Faulty one-way clutch No.1 Inspect. If NG, replace.
Poor 2
→
1 shift, excessive
shock or slippage
Faulty second brake Inspect. If NG, replace.
Faulty one-way clutch No.1 Inspect. If NG, replace.
Faulty one-way clutch No.2 Inspect. If NG, replace.
Non operate TCC / lock-up
system
Faulty torque converter Replace.
Excessive “N”
→
“D” time
lag
Faulty oil pump Inspect. If NG, replace.
Faulty forward clutch Inspect. If NG, replace.
Leakage from “D” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Excessive “N”
→
“R” time
lag
Faulty oil pump Inspect. If NG, replace.
Faulty direct clutch Inspect. If NG, replace.
Faulty reverse brake Inspect. If NG, replace.
Leakage from “R” range fluid pressure
circuit
Overhaul or replace valve body assembly.
Poor engine brake in
downshift to “2” range
Faulty 2nd coast brake Inspect. If NG, replace.
Poor engine brake in
downshift to “L” range
Faulty reverse brake Inspect. If NG, replace.
Condition Possible cause Correction / Reference Item
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check: ”.
2 Check DTC
Is DTC, P0722, P0752, P0962, P0963, P0973, P0974,
P0976, P0977 or P1702 detected?
Perform DTC Flow to
repair and retry.
Go to Step 3.
3 ECT check
1) Warm up engine to normal operating temperature.
2) Check ECT monitored by TCM using scan tool.
Is ECT indicated –40
°
C (–40
°
F)?
Go to Step 4. Faulty ECT sensor, its
circuit or engine cooling
system. If OK, substitute
a known-good TCM and
recheck.