Suzuki Liana RH418 Supplementary Service Manual page 283

DTC Detecting Condition and Trouble Area
DTC detecting condition
Voltage of torque reduction signal circuit TCM terminal is low
although TCM does not require ECM to reduce engine
torque.
DTC Confirmation Procedure
1) Clear DTCs in TCM memory.
2) Start engine and run it for 1 minute.
3) Check DTC.
DTC Troubleshooting
Step
1 Was "A/T System Check" performed?
2 Check torque reduction signal circuit for open
1) Turn ignition switch OFF.
2) Disconnect TCM and ECM connectors from TCM and
ECM.
3) Check continuity between terminal "G07-18" of
disconnected harness side TCM connector and terminal
"G03-12" of disconnected harness side ECM connector.
Is continuity indicated?
3 Check torque reduction signal circuit for ground short
1) Check continuity between terminal "G07-18" of
disconnected harness side TCM connector and ground.
Is continuity indicated?
4 Check power supply from ECM
1) Connect ECM connectors to ECM.
2) Turn ignition switch ON.
3) Measure voltage between terminal "G03-12" of
connected harness side ECM connector and ground.
Is it 4 – 6 V?
Action
Automatic Transmission/Transaxle:
Trouble area
• Torque reduction signal circuit from TCM to ECM
malfunction.
• TCM
• ECM
Yes
Go to Step 2.
Go to Step 3.
"LT GRN/RED" 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.
5A-57
No
Go to "A/T System
Check".
"LT GRN/RED" circuit
open.
Go to Step 4.
Faulty ECM.