DTC Troubleshooting: P2184
DTC P2184: ECT Sensor 2 Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P2184 ECT Sensor 2 Circuit Low Voltage
    

1.
Problem verification:

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

?2.
Clear the DTC with the HDS.


?3.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P2184 ECT Sensor 2 Circuit Low Voltage
    

Is DTC P2184 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 2 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.
Determine possible failure area (ECT sensor 2, others):

Determine possible failure area (ECT sensor 2, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
ECT Sensor 2 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
Clear the DTC with the HDS.


?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P2184 ECT Sensor 2 Circuit Low Voltage
    

Is DTC P2184 indicated?

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
3.
Shorted wire check (TW2/TW2 SENSOR line):

Shorted wire check (TW2/TW2 SENSOR 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 No. 1 (96P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
ECT Sensor 2 2P connector: disconnected
 
PCM connector No. 1 (96P): disconnected
Test point 1
ECT sensor 2 2P connector (female terminals) No. 2:
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the TW2/TW2 SENSOR wire between PCM connector No. 1 terminal No. 85 and ECT sensor 2.?
     
NO
     
     
     
The TW2/TW2 SENSOR wire 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 P2184 goes away and the PCM was substituted, replace the original PCM.?