Suzuki Liana RH413, Service Manual

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1A-51 Engine General Information and Diagnosis:
DTC Troubleshooting
Step Action Yes No
1 Was “Engine and Emission Control System Check”
performed? Go to Step 2. Go to “Engine and
Emission Control
System Check”.
2 Check ECT sensor and its circuit
1) Connect scan tool with ignition switch OFF.
2) Turn ignition switch ON.
3) Check engine coolant temp. displayed on scan tool.
Is –40
°
C (–40
°
F) or 119
°
C (246
°
F) indicated?
Go to Step 3. Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.
3 Check wire harness
1) Disconnect ECT sensor connector.
2) Check engine coolant temp. displayed on scan tool.
Is –40
°
C (–40
°
F) indicated?
Replace ECT sensor. “LT GRN” wire shorted
to ground.
If wire is OK, substitute
a known-good ECM and
recheck.
4 Does scan tool indicate –40
°
C (–40
°
F) at Step 2? Go to Step 6. Go to Step 5.
5 Check wire harness
1) Disconnect ECT sensor connector with ignition switch
OFF.
2) Check for proper connection to ECT sensor at “ORN”
and “LT GRN” wire terminals.
3) If OK, then with ignition switch ON.
Is voltage applied to “LT GRN” wire terminal about 4 – 6 V?
Go to Step 4. “LT GRN” wire open or
shorted to power, or
poor “C41-14”
connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
6 Check wire harness
1) Using service wire, connect ECT sensor connector
terminals.
2) Turn ignition switch ON and check engine coolant temp.
displayed on scan tool.
Is 119
°
C (246
°
F) indicated?
Replace ECT sensor. “ORN” wire open or
poor “C41-10”
connection.
If wire and connection
are OK, substitute a
known-good ECM and
recheck.
I2RH01110067-01
IYSY01111026-01