Suzuki Grand Vitara Manual page 83

Troubleshooting
Step
1 Check TCM back-up power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at "E92-24"
terminal.
3) If OK, check voltage at terminal "E92-24" of
disconnected TCM connector.
Is it 10 – 14 V?
2 Check TCM power circuit
1) Disconnect TCM connector with ignition switch OFF.
2) Check for proper connection to TCM at "E92-6" terminal.
3) If OK, turn ignition switch ON and check voltage at
terminal "E92-6" of disconnected TCM connector.
Is it 10 – 14 V?
3 Check A/T relay operation
1) Check A/T relay operation referring to "A/T Relay
Inspection: ".
Is check result satisfactory?
4 Check TCM ground circuit
1) Turn ignition switch OFF.
2) With TCM connectors disconnected, check for proper
connection to TCM at "E92-1" / "E92-23" terminal.
3) If OK, check resistance between "E92-1" / "E92-23"
terminal of disconnected TCM connector and body
ground.
Is continuity indicated?
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Action
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Automatic Transmission/Transaxle:
Yes
Go to Step 2.
Go to Step 4.
"BLK/WHT", "WHT/
GRN", or "BLK" circuit
for power supply open.
TCM power and ground
circuits are in good
condition.
5A-79
No
"WHT" circuit open or
shorted to ground.
Go to Step 3.
Replace A/T relay
included in power
integration No.2 in main
fuse box.
"BLK" circuit for TCM
ground open.