Suzuki Liana RH418, Supplementary Service Manual

Page: 280 / 371

5A-54 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 Is there DTC related to engine coolant temperature sensor
(P0115)? Go to DTC P0115 Flow. Go to Step 3.
3 Check engine coolant temperature signal circuit for IG
short
1) Turn ignition switch OFF.
2) Disconnect TCM and ECM connectors from TCM and
ECM.
3) Check proper connection to TCM at terminal “G07-7”
and to ECM at terminal “G04-8”.
4) If OK, turn ignition switch ON and measure voltage
between terminal “G07-7” of disconnected harness side
TCM connector and ground.
Is it 10 – 14 V?
“GRY/BLK” circuit
shorted to power circuit. Go to Step 4.
4 Check engine coolant temperature signal circuit for
open
1) Turn ignition switch OFF.
2) Check continuity between terminal “G07-7” of
disconnected harness side TCM connector and terminal
“G04-8” of disconnected harness side ECM connector.
Is continuity indicated?
Go to Step 5. “GRY/BLK” circuit open.
5 Check engine coolant temperature signal circuit for
ground short
1) Check continuity between terminal “G07-7” of
disconnected harness side TCM connector and ground.
Is continuity indicated?
“GRY/BLK” circuit
shorted to ground. 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 or
ECM and recheck.