No Gear Shift To O/D - Suzuki Liana RH418 Supplementary Service Manual

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No Gear Shift to O/D

System Description
TCM does not shift to O/D gear under any of the following condition.
• O/D off switch is turned ON. ("O/D OFF" lamp ON.)
• Engine coolant temperature is lower than 50 °C (122 °F)
• TCM detects DTC P0743.
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.
Step
1
Was "A/T System Check" performed?
2
Check DTC
Is DTC P0743 detected?
3
1) Perform running test under the following conditions and
check voltage between terminal "G08-4" of TCM
connector and ground, terminal "G08-3" of TCM
connector and ground.
• O/D off switch is OFF ("O/D OFF" lamp OFF.)
• Selector lever is in "D" range.
• Engine coolant temperature is normal operating
temperature.
• Cruise control switch is turned OFF.
• Drive vehicle with 4th gear condition referring to
"Automatic Gear Shift Diagram".
Is each terminal voltage 0 – 2 V?
4
"O/D" off switch signal inspection
1) With ignition switch ON, check voltage between terminal
"G07-3" of TCM connector and ground.
O/D off switch specification
Released: 10 – 14 V
Pressed: 0 – 2 V
Is result as specified?
Action
Automatic Transmission/Transaxle:
Yes
Go to Step 2.
Perform DTC Flow to
repair and retry.
Faulty shift solenoid
valve, circuit or
transaxle.
Substitute a Known-
good TCM and recheck.
5A-33
S3RH0B5104019
No
Go to "A/T System
Check".
Go to Step 3.
"GRY" or "GRN/ORN"
circuit shorted to power
circuit. If wire is OK, go
to Step 4.
Faulty O/D off switch or
its circuit.
If OK, substitute a
know-good TCM and
recheck.

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