Suzuki SWIFT RS415 2017, Service Manual

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5A-70 Automatic Transmission:
DTC Troubleshooting
Step Action Yes No
1 Was “A/T System Check” performed? Go to Step 2. Go to “A/T System
Check: ”.
2 Check DTC
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Check DTC in ECM, TCM and BCM.
Is there any DTC(s) (other than DTC P1674, P1675, P1676,
P1678 in ECM, DTC P1774, P1775, P1777, P1778 in TCM
and DTC U1073, U1001, U1100, U1101 in BCM)?
Go to applicable DTC
diag. flow. Go to Step 3.
3 Check ECM, TCM, BCM and combination meter
connectors
1) Check for proper connection at each ECM, TCM, BCM
and combination meter connector terminals with ignition
switch turned OFF.
2) If connections are OK, recheck TCM for DTC with
engine running.
Is there DTC P1774?
Go to Step 4. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection: in Section
00”.
4 Check TCM power and ground circuit
1) Check for TCM power and ground circuit referring to
“TCM Power and Ground Circuit Check: ”.
Is it in good condition?
Go to Step 5. Repair TCM power and/
or ground circuits.
5 Check DTC in BCM and ECM (bus off)
1) Check DTC(s) in ECM and BCM.
Is there DTC(s) P1674 in ECM and/or U1073 in BCM?
Go to Step 6. Go to Step 7.
6 Check DTC in BCM and ECM (bus off)
1) Disconnect connectors from TCM with ignition switch
turned OFF.
2) Check DTC(s) in ECM and BCM.
Is there DTC(s) P1674 in ECM and/or U1073 in BCM?
Go to Step 7. Substitute a known-
good TCM and recheck.
7 Check DTC in TCM
1) Connect connectors to TCM and disconnect connectors
from combination meter with ignition switch turned OFF.
2) Check DTC in TCM.
Is there DTC 1774?
Go to Step 8. Substitute a known-
good combination meter
and recheck.
8 Check DTC in TCM
1) Disconnect connector from ECM with ignition switch
turned OFF.
2) Check DTC in TCM.
Is there DTC 1774?
Go to Step 9. Substitute a known-
good ECM and recheck.