Suzuki Liana RH418, Supplementary Service Manual

Page: 270 / 371

5A-44 Automatic Transmission/Transaxle:
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 engine speed input signal circuit for open
1) Turn ignition switch OFF.
2) Disconnect TCM and ECM connectors from TCM and
ECM.
3) Check for proper connection to TCM at terminal “G07-
15” and to ECM at terminal “G04-2”.
4) If OK, check continuity between terminals “G07-15” and
“G04-2” of disconnected harness side TCM and ECM
connectors.
Is continuity indicated?
Go to Step 3. “LT GRN/BLK” circuit
open.
3 Check engine speed input signal circuit for short
1) Check continuity between terminal “G07-15” of
disconnected harness side TCM connector and ground.
Is continuity indicated?
“LT GRN/BLK” circuit
shorted to ground. Go to Step 4.
4 Check TCM terminal voltage
1) Connect TCM connectors to TCM with ignition switch
OFF.
2) Turn ignition switch ON.
3) Measure voltage between terminal “G07-15” of
connected harness side TCM connector and ground.
Is it 10 – 14 V?
Go to Step 5. Substitute a known-
good TCM and recheck.
5 Check ECM terminal voltage
1) Turn ignition switch OFF.
2) Connect ECM connectors to ECM.
3) Turn ignition switch ON.
4) Measure voltage between terminal “G04-2” of connected
harness side ECM connector and ground.
Is it 10 – 14 V?
Intermittent trouble or
faulty TCM or ECM.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section 00
in related manual”.
If OK, substitute a
known-good TCM and/
or ECM recheck. Substitute a known-
good ECM and recheck.