Dtc P0117: Engine Coolant Temperature Circuit Low - Suzuki Swift Sport 2004 Service & Repair Manual

Step
10 Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between "C37-55" terminal of ECM
connector and vehicle body ground.
Is resistance below 5
11 ECT sensor check
1) Check ECT sensor according to "ECT Sensor Inspection
in Section 1C".
Is it in good condition?

DTC P0117: Engine Coolant Temperature Circuit Low

Wiring Diagram
Refer to "DTC P0116: Engine Coolant Temperature Circuit Range / Performance"
DTC Detecting Condition and Trouble Area
DTC detecting condition
ECT sensor output voltage is less than 0.15 V for 0.5 seconds
continuously.
(High engine coolant temperature (low voltage / low resistance))
(1 driving cycle detection logic)
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.
Action
Ω
?
Engine General Information and Diagnosis:
Yes
"ORN" wire is high
resistance circuit.
Poor "C37-55"
connection.
Substitute a known-
good ECM and recheck.
Trouble area
• ECT sensor circuit
• ECT sensor
• ECM
1A-79
No
Faulty ECM ground
circuit.
If circuit is OK,
substitute a known-
good ECM and recheck.
Replace ECT sensor.
S7RS0B1104027