DTC P1116

DTC P1116  : ECT Sensor 1 Circuit Range/Performance Problem

DTC (PGM-FI)

1. Connector visual check

   -1. Check for poor connections or loose terminals at these parts:

   • ECT sensor 1
   • ECT sensor 2

   Are the connections and terminals OK?

   YES 

   The parts are OK. Go to step 2.

   NO 

   Repair the connections or terminals, then do the repair verification.

2. PGM-FI system check

   -1. Turn the vehicle to the ON mode.

   -2. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P1116 ECT Sensor 1 Circuit Range/Performance Problem
   P2183 ECT Sensor 2 Circuit Range/Performance Problem

   Are DTC P1116 and P2183 indicated at the same time?

   YES 

   Go to step 5.

   NO 

   Only DTC P1116 is indicated. Go to step 3

3. ECT sensor 1 performance check

   -1. Start the engine, and let it idle for 10 minutes.

   -2. Check the parameter(s) below with the HDS.

   Signal	Malfunction Threshold		Current conditions
   	Values	Unit	Values	Unit
   ECT SENSOR 1	Less than 108	deg.F
   	Less than 42	deg.C

   Do the current condition(s) match the malfunction threshold?

   YES 

   Replace ECT sensor 1 , then do the repair verification.

   NO 

   ECT sensor 1 is OK at this time. Go to step 4.

4. Problem verification

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Allow ECT sensor 1 and the engine to cool to the ambient temperature.

   -3. Note the ambient temperature.

   -4. Turn the vehicle to the ON mode.

   -5. Quickly note the value of ECT SENSOR 1 in the DATA LIST with the HDS.

   Signal	Current conditions
   	Values	Unit
   ECT SENSOR 1

   -6. Compare the value of ECT SENSOR 1 with the ambient temperature.

   Does the value of ECT SENSOR 1 differ 5.4 deg.F (3 deg.C) or more from the ambient temperature?

   YES 

   Replace ECT sensor 1 , then do the repair verification.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM.

5. ECT sensor 1 performance check

   -1. Start the engine, and let it idle for 10 minutes.

   -2. Check the parameter(s) below with the HDS.

   Signal	Malfunction Threshold		Current conditions
   	Values	Unit	Values	Unit
   ECT SENSOR 1	Less than 108	deg.F
   	Less than 42	deg.C

   Do the current condition(s) match the malfunction threshold?

   YES 

   Replace ECT sensor 1 , then do the repair verification.

   NO 

   ECT sensor 1 is OK at this time. Go to step 6.

6. ECT sensor 2 performance check

   -1. Let the engine idle for 10 minutes.

   -2. Check the parameter(s) below with the HDS.

   Signal	Malfunction Threshold		Current conditions
   	Values	Unit	Values	Unit
   ECT SENSOR 2	Less than 108	deg.F
   	Less than 42	deg.C

   Do the current condition(s) match the malfunction threshold?

   YES 

   Replace ECT sensor 2 , then do the repair verification.

   NO 

   Go to step 7.

7. Problem verification

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Allow the sensors and the engine to cool to the ambient temperature.

   -3. Note the ambient temperature.

   -4. Turn the vehicle to the ON mode.

   -5. Quickly note the value of ECT SENSOR 1 and ECT SENSOR 2 in the DATA LIST with the HDS.

   Signal	Current conditions
   	Values	Unit
   ECT SENSOR 1
   ECT SENSOR 2

   -6. Compare the value of ECT sensor 1 and the value of ECT SENSOR 2 with the ambient temperature individually.

   Does either sensor differ more than 5.4 deg.F (3 deg.C) from the ambient temperature?

   YES 

   Replace the sensor that differed more than 5.4 deg.F (3 deg.C) from the ambient temperature, then do the repair verification.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM.

8. Repair verification

   -1. Turn the vehicle to the ON mode.

   -2. Reset the PCM with the HDS .

   Reset PCM

   -3. Do the PCM idle learn procedure .

   -4. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   P1116 ECT Sensor 1 Circuit Range/Performance Problem

   DTC (PGM-FI)

   Is DTC P1116 indicated?

   YES 

   Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM, then go to step 1.

   NO 

   Troubleshooting is complete. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.