Suzuki Wagon R Manual page 1138

6-1-46 GENERAL INFORMATION AND ENGINE DIAGNOSIS
DTC P0115 ENGINE COOLANT TEMPERATURE (ECT) CIRCUIT
MALFUNCTION
CIRCUIT DESCRIPTION
ECT sensor
DTC DETECTING CONDITION
D Low engine coolant temperature (High voltage-High resistance)
or
D High engine coolant temperature (Low voltage-Low resistance)
NOTE:
Before inspecting, be sure to check that coolant temp. meter in combination meter indicates normal oper-
ating temperature (Engine is not overheating).
DTC CONFIRMATION PROCEDURE
1) Clear DTC, start engine and keep it at idle for 1 min.
2) Select "DTC" mode on scan tool and check DTC.
To combination To other sensors
(ECT) meter
POSSIBLE CAUSE
D "YEL/GRN" circuit open or shorted to
power
D "BRN/WHT" circuit open
D ECT sensor malfunction
D ECM (PCM) malfunction