Diagnostic Aids

After the engine has started, the ECT should rise steadily to about 90°C (194°F) then stabilize when the thermostat opens.

Use the temperature vs. Resistance values table to evaluate the possibility of a skewed sensor. Refer to "Trip:".

Fig 1: P0118 - Engine Coolant Temperature Sensor High Input Diagnostic Chart (1 Of 2)

Courtesy of SUZUKI OF AMERICA CORP.

Fig 2: P0118 - Engine Coolant Temperature Sensor High Input Diagnostic Chart (2 Of 2)

Courtesy of SUZUKI OF AMERICA CORP.