Kohler KG2204 Service page 63

Action
 Turn the ECM power OFF.
 Disconnect the CT sensor connector.
 Using a DVOM, check the resistance between terminals A and B of
the CT sensor and compare the resistance reading to the chart,
Figure 4-4.
Does the resistance value agree with the chart?
 Turn the ECM power OFF.
 Disconnect the wire harness at the ECM.
 Using a DVOM, check for continuity between the following:
o CT connector pin A and P26-55.
o CT connector pin B and P26-51.
Does the DVOM show continuity?
 Using a DVOM check for continuity between CT connector pin A and
engine ground.
Does the DVOM show continuity?
 Replace the CT sensor. Refer to Section 5.2 Is the replacement
complete?
 Remove all test equipment except Spectrum.
 Connect any disconnected components.
 Using Spectrum, clear DTC information from the ECM.
 Turn the ECM power OFF and wait 30 seconds.
 Start the engine and operate to full operating temperature.
 Use Spectrum to verify if the DTC code was regenerated.
 Observe engine performance.
Does the engine operate normally with no stored codes?
 Replace the ECM. Refer to Section 5.4.
Is the replacement complete?
 Remove all test equipment except Spectrum.
 Connect any disconnected components.
 Using Spectrum, clear DTC information from the ECM.
 Turn the ECM power OFF and wait 30 seconds.
 Start the engine and operate to full operating temperature
 Use Spectrum to verify if the DTC code was regenerated.
 Observe engine performance.
Does the engine operate normally with no stored codes?
Figure 4-5 Coolant Temperature Sensor Troubleshooting
TP-6903 5/16a
Yes No
Go to the next step. Replace the sensor.
Go to the next step. Repair the open circuit.
Repair the sensor
Go to the next step.
signal short to ground.
Go to the next step.
Troubleshooting is
Go to the next step.
complete.
Go to the next step.
Check ECM for any
Troubleshooting is other DTCs. Repeat
complete. these troubleshooting
steps.
Electrical System and Sensor Troubleshooting 63