Dtc P0117: Engine Coolant Temperature Circuit Low - Suzuki Grand Vitara Service Manual

Step
10 Ground circuit check
1) Remove ECM from its bracket with ECM connectors
connected.
2) Measure resistance between "C37-57" terminal of ECM
connector and vehicle body ground.
Is resistance below 3
11 ECT sensor check
1) Check ECT sensor according to "Engine Coolant
Temperature (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
DTC will be set when all of following conditions are detected for
0.5 seconds continuously.
• Engine is running
• Voltage of ECT sensor output is less than specified value
(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 and pending DTC.
DTC Troubleshooting
NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions For DTC Troubleshooting: ".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 ECT sensor and its circuit check
1) Connect scan tool with ignition switch turned OFF.
2) Turn ON ignition switch.
3) Check engine coolant temp. displayed on scan tool.
° °
Is 130 C (266 F) indicated?
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Action
Ω
?
Action
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Engine General Information and Diagnosis:
Yes
"GRY/GRN" wire is high
resistance circuit.
Poor "C37-57"
connection.
Substitute a known-
good ECM and recheck.
Trouble area
• ECT sensor circuit
• ECT sensor
• ECM
Yes
Go to Step 2.
Go to Step 3.
1A-94
No
Faulty ECM ground
circuit.
If circuit is OK,
substitute a known-
good ECM and recheck.
Replace ECT sensor.
S5JB0A1104027
No
Go to "Engine and
Emission Control
System Check: ".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection: in Section
00".