Dtc P0118: Engine Coolant Temperature Circuit High - Suzuki SX4 Service Manual

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1A-84 Engine General Information and Diagnosis:
Step
3
ECM voltage check
1) Disconnect connector from ECT sensor with ignition
switch turned OFF.
2) Check for proper connection to ECT sensor at "LT GRN"
and "GRY/BLU" wire terminals.
3) If OK, then turn ON ignition switch, measure voltage
between "LT GRN" wire terminal of ECT sensor
connector and vehicle body ground.
Is voltage about 4 – 6 V?
4
ECT sensor short circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure resistance between "LT GRN" wire terminal of
ECT sensor connector and vehicle body ground.
Is resistance infinity?
5
ECT sensor short circuit check
1) Turn ON ignition switch.
2) Measure voltage between "LT GRN" wire terminal of
ECT sensor connector and vehicle body ground.
Is voltage about 0 V?
6
ECT sensor for performance check
1) Check ECT sensor according to "Engine Coolant
Temperature (ECT) Sensor Inspection in Section 1C".
Is it in good condition?

DTC P0118: Engine Coolant Temperature Circuit High

Wiring Diagram
Refer to "DTC P0116: Engine Coolant Temperature Circuit Range / Performance".
DTC Detecting Condition and Trouble Area
Voltage of ECT sensor output is more than specified value with engine running.
(Low engine coolant temperature (high voltage / high resistance))
(1 driving cycle detection logic)
NOTE
When DTC P0108 and P0113 are indicated together, it is possible that "GRY/BLU" wire circuit open.
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and run it for 10 sec. or more.
4) Check DTC and pending DTC.
Action
I5RW0A110025-01
DTC detecting condition
Yes
Go to Step 6.
Go to Step 5.
Go to Step 6.
Substitute a known-
good ECM and recheck.
• ECT sensor circuit
• ECT sensor
• ECM
No
Go to Step 4.
"LT GRN" wire is
shorted to ground
circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
"LT GRN" wire is
shorted to other circuit.
If wire is OK, substitute
a known-good ECM and
recheck.
Replace ECT sensor.
S7RW0A1104030
Trouble area

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