DTC Troubleshooting: P0115
DTC P0115: ECT Sensor 1 Out of Range
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0115 ECT Sensor 1 Out of Range
    

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Wait 10 seconds or more.

?4.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0115 ECT Sensor 1 Out of Range
    

Is DTC P0115 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at ECT sensor 1 and the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Shorted wire check (TW line):

Shorted wire check (TW line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ECT sensor 1 2P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
ECT sensor 1 2P connector (female terminals) No. 2:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the TW wire between the PCM (E52) and ECT sensor 1.?
     
NO
     
     
     
The TW wire is not shorted. Go to step 3.
3.
Open wire check (TW line):

Open wire check (TW line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ECT sensor 1 2P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
ECT sensor 1 2P connector (female terminals) No. 2:
Test point 2
PCM connector E (80P) No. 52


Is there continuity?

     
YES
     
     
     
The TW wire is OK. Go to step 4.
     
NO
     
     
     
Repair an open in the TW wire between the PCM (E52) and ECT sensor 1.?
4.
Open wire check (SG2 line):

Open wire check (SG2 line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ECT sensor 1 2P connector: disconnected
 
PCM connector E (80P): disconnected
Test point 1
ECT sensor 1 2P connector (female terminals) No. 1:
Test point 2
PCM connector E (80P) No. 78


Is there continuity?

     
YES
     
     
     
The SG2 wire is OK. Go to step 5.
     
NO
     
     
     
Repair an open in the SG2 wire between the PCM (E78) and ECT sensor 1.?
5.
ECT sensor 1 check:

ECT sensor 1 check
?1.
Substitute a known-good ECT sensor 1.

?2.
Reconnect all connectors.

?3.
Exit the SCS mode with the HDS.


?4.
Turn the vehicle to the ON mode.

?5.
Clear the DTC with the HDS.


?6.
Wait 10 seconds or more.

?7.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0115 ECT Sensor 1 Out of Range
    

Is DTC P0115 indicated?

     
YES
     
     
     
ECT sensor 1 is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0115 goes away and the PCM was substituted, replace the original PCM.?
     
NO