No Gear Shift To 4Th Gear - Suzuki Swift Sport 2004 Service & Repair Manual

Condition
Non operate TCC (lock-
up) system
→
Excessive "N" "D" time
lag
→
Excessive "N" "R" time
lag
Poor engine brake in
downshift to "2" range
Poor engine brake in
downshift to "L" range

No Gear Shift to 4th gear

System Description
TCM does not shift to 4th gear under any of the following condition.
• "3" position switch is turned ON.
• Engine coolant temperature is less than 50 °C (122 °F).
• A/T fluid temperature is less than 20 °C (68 °F).
• A/T fluid temperature is more than 130 °C (266 °F) while TCM is detecting P2762, P2763 and P2764.
• TCM detects the following DTCs.
P0712 / P0713 / P0717 / P0722 / P0787 / P0788 / P0961 / P0962 / P0963 / P0973 / P0974 / P0976 / P0977 / P1702
/ P1703 / P1774 / P1777
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 a tester, on a level road.
Step
1 Was "A/T System Check" performed?
2 Check DTC
Is DTC P0712, P0713, P0717, P0722, P0961, P0962,
P0963, P0973, P0974, P0976, P0977, P1702, P1703,
P1774 and/or P1777 detected?
Possible cause
Faulty torque converter
Faulty oil pump
Faulty forward clutch
Faulty one-way No.2 clutch
Leakage from "D" range fluid pressure
circuit
Faulty oil pump
Faulty reverse clutch
Faulty 1st and reverse brake
Leakage from "R" range fluid pressure
circuit
Faulty O/D and 2nd coast brake
Faulty 1st and reverse brake
Action
Automatic Transmission/Transaxle:
Correction / Reference Item
Replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Replace valve body assembly.
Inspect. If NG, replace.
Inspect. If NG, replace.
Inspect. If NG, replace.
Replace valve body assembly.
Inspect. If NG, replace.
Inspect. If NG, replace.
Yes
Go to Step 2.
Go to applicable DTC
diag. flow.
5A-41
S7RS0B5104019
No
Go to "A/T System
Check".
Go to Step 3.