DTC Troubleshooting: P0453
DTC P0453: FTP Sensor Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0453 FTP Sensor Circuit High Voltage
      

1.
EVAP system check:

EVAP system check
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
Remove the fuel fill cap.

?5.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
FTP SENSOR
More than 4.7
V
    

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

     
YES
     
     
     
Go to step 3.
     
NO
     
     
     
Go to step 2.
2.
Problem verification:

Problem verification
?1.
Reinstall the fuel fill cap.

?2.
Start the engine.

?3.
Hold the engine speed at 3,000 rpm without load (CVT in P or N, M/T in neutral) until the radiator fan comes on, then let it idle.

?4.
Monitor the OBD STATUS for DTC P0453 in the DTCs MENU with the HDS.
DTC Description
OBD STATUS
P0453 FTP Sensor Circuit High Voltage
  

Does the HDS indicate FAILED?

     
YES
     
     
     
The failure is duplicated. Go to step 3.
     
NO
     
     
     
If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the FTP sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot. If the HDS indicates NOT COMPLETED, keep idling until a result comes on.?
3.
Determine possible failure area (FTP sensor, others):

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

?2.
Disconnect the following connector.
FTP sensor 3P connector

?3.
Connect terminals A and B with a jumper wire.
Terminal A
FTP sensor 3P connector No. 1
Terminal B
FTP sensor 3P connector No. 2


?4.
Turn the vehicle to the ON mode.

?5.
Check the parameter(s) below with the HDS.
Signal
Threshold
Current conditions
Values
Unit
Values
Unit
FTP SENSOR
More than 4.7
V
    

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

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
4.
Determine possible failure area (SG5 line, others):

Determine possible failure area (SG5 line, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
FTP sensor 3P connector: disconnected
Test point 1
FTP sensor 3P connector No. 1
Test point 2
FTP sensor 3P connector No. 3


Is there about 5.0 V?

     
YES
     
     
     
Go to step 5.
     
NO
     
     
     
Go to step 6.
5.
Open wire check (P/TANK /PTANK line):

Open wire check (P/TANK /PTANK line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector B (51P)

?4.
Connect terminals A and B with a jumper wire.
Terminal A
FTP sensor 3P connector No. 2
Terminal B
Body ground


?5.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
FTP sensor 3P connector: disconnected
FTP sensor 3P connector No. 2: jumped to body ground
PCM connector B (51P): disconnected
Test circuit
PTANK
Test point 1
PCM connector B (51P) No. 43
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
The P/TANK /PTANK wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0453 goes away and the PCM was updated, troubleshooting is complete. If DTC P0453 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the P/TANK /PTANK wire between the PCM (B43) and the FTP sensor.?
6.
Open wire check (SG5 line):

Open wire check (SG5 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector A (51P)

?4.
Connect terminals A and B with a jumper wire.
Terminal A
FTP sensor 3P connector No. 1
Terminal B
Body ground


?5.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
FTP sensor 3P connector: disconnected
FTP sensor 3P connector No. 1: jumped to body ground
PCM connector A (51P): disconnected
Test point 1
PCM connector A (51P) No. 39
Test point 2
Body ground

Is there continuity?

     
YES
     
     
     
The SG5 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0453 goes away and the PCM was updated, troubleshooting is complete. If DTC P0453 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG5 wire between the PCM (A39) and the FTP sensor.?