Dtc P0115: Engine Coolant Temperature Circuit Malfunction - Suzuki GRAND VITARA 2005 Service Manual

1A-36 Engine General Information and Diagnosis:

DTC P0115: Engine Coolant Temperature Circuit Malfunction

NOTE
• Conditions for applying the fault finding procedure to stored faults:
– When an attempt is made to start the engine
– With the engine running
• If the fault is present:
– The coolant temperature: "Coolant Temp" on Data List of SUZUKI scan tool is fixed at 118.1 °C,
244.6 °F with engine running, 0.1 °C, 32 °F with engine stopping
– The preheating phase is greater than 10 seconds,
– The radiator fan is continuously operated,
– The Injection warning light (gravity 1 warning light) is lit.
• Use service wire for all operations on the ECM connectors
Wiring Diagram
For wiring circuit and connector number, refer to "A-5 Engine and A/C Control System Circuit Diagram (DSL): in
Section 9A".
Detecting Condition
Displaying on SUZUKI scan tool
CC.0
CO.1
Troubleshooting
Check the connections of the "C09-4" terminal of ECT sensor connector.
Check the ECM connections.
Repair if necessary.
Measure the resistance of the ECT sensor between "C09-1" and "C09-4" terminals of its connector.
Replace the sensor if its resistance is not approximately:
68780 – 82780 Ω at –40 °C, –40 °F
12338 – 12582 Ω at –10 °C, –14 °F
2140 – 2364 Ω at 25 °C, 77 °F
772 – 850 Ω at 50 °C, 122 °F
275 – 291 Ω at 80 °C, 176 °F
112 – 118 Ω at 110 °C, 230 °F
85 – 89 Ω at 120 °C, 248 °F
Check for the insulation, continuity and the absence of interference resistance on the connections:
• Between "C09-1" wire of ECT sensor connector and "C86-23" terminal of ECM connector
• Between "C09-2" wire of ECT sensor connector and "C86-11" terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the ECT sensor.
Detecting condition
Short circuit to vehicle body ground
Open circuit or short circuit to +12 V
S5JB0B1104095