REMOVAL AND INSTALLATION or PCM UPDATE . If any other Pending or Confirmed DTCs were
indicated, go to the indicated DTC's troubleshooting.
FAILED : Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then check the OBD STATUS again.
NOT COMPLETED : Keep idling until a result comes on.
DTC P0453: FTP SENSOR CIRCUIT HIGH VOLTAGE
Fig. 196: DTC Troubleshooting Flow Chart (P0453)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board snapshot, and
review the general troubleshooting information See HOW TO TROUBLESHOOT
THE A/T SYSTEM or HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS .
DTC Description
Confirmed DTC
Pending DTC Freeze Frame
P0453 FTP SENSOR CIRCUIT HIGH
VOLTAGE
1. EVAP system check:
ο‘
1. Turn the ignition switch to ON (II).
ο‘
2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
ο‘
ο‘
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3. Turn the ignition switch to LOCK (0).
4. Remove the fuel fill cap.
5. Turn the ignition switch to ON (II).
6. Check the parameter(s) below with the HDS.
Threshold
Values Unit Values Unit
FTP SENSOR More than 4.7 V
Current DTC
Signal
Do the current condition(s) match the threshold?
YES : Go to step 3.
NO : Go to step 2.
2. Problem verification:
ο‘
1. Install the fuel fill cap.
ο‘
2. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator
fan comes on, then let it idle.
ο‘
3. Monitor the OBD STATUS for DTC P0453 with the HDS.
DTC Description
OBD STATUS
P0453 FTP SENSOR CIRCUIT HIGH VOLTAGE
Does the HDS indicate FAILED?
YES : 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 HDS indicates NOT COMPLETED,
keep idling until a result comes on.
3. Determine possible failure area (FTP sensor, others):
ο‘
1. Turn the ignition switch to LOCK (0).
2. Disconnect the following connector.
ο‘
FTP sensor 3P connector
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3. Connect terminals A and B with a jumper wire.
Terminal A FTP sensor 3P connector No. 1 (GRY)
Terminal B FTP sensor 3P connector No. 2 (WHT)
Fig. 197: Connecting Wire Between FTP Sensor 3P Connector No. 1 (GRY) And No. 2
(WHT)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
ο‘
ο‘
4. Turn the ignition switch to ON (II).
5. Check the parameter(s) below with the HDS.
Threshold
Values Unit Values Unit
FTP SENSOR More than 4.7 V
Current DTC
Signal
Do the current condition(s) match the threshold?
YES : Go to step 4.
NO : REPLACE THE FTP SENSOR , then do the repair verification .
4. Determine possible failure area (PTANK line, SG6 line):
ο‘
1. Measure the voltage between test points 1 and 2.
Test condition IG ON (II)
FTP sensor 3P connector: disconnected
Test circuit VCC6, SG6
Test point 1 FTP sensor 3P connector No. 1 (GRY)
Test point 2 FTP sensor 3P connector No. 3 (RED)
Fig. 198: Measuring Voltage Between FTP Sensor 3P Connector No. 1 (GRY) And No. 3
(RED)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there about 5.0 V?
YES : Go to step 5.
NO : Go to step 6.
5. Open wire check (PTANK line):
ο‘
ο‘
ο‘
1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connector.
PCM connector A (49P)
ο‘
4. Connect terminals A and B with a jumper wire.
Terminal A FTP sensor 3P connector No. 2 (WHT)
Terminal B Body ground
Fig. 199: Identifying FTP Sensor 3P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
ο‘
5. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
FTP sensor 3P connector: disconnected
FTP sensor 3P connector No. 2: jumped to body ground
PCM connector A (49P): disconnected
Test circuit PTANK
Test point 1 PCM connector A (49P) No. 37 (WHT)
Test point 2 Body ground
Fig. 200: Checking Continuity Between PCM Connector A (49P) No. 37 (WHT) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The PTANK wire is OK. Update the PCM See PCM REMOVAL AND INSTALLATION or
PCM UPDATE if it does not have the latest software, or substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then do the repair verification .
NO : Repair an open in the PTANK wire between the PCM (A37) and the FTP sensor, then do the repair
verification .
6. Open wire check (SG6 line):
ο‘
ο‘
ο‘
1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connector.
PCM connector A (49P)
ο‘
4. Connect terminals A and B with a jumper wire.
Terminal A FTP sensor 3P connector No. 1 (GRY)
Terminal B Body ground
Fig. 201: Identifying FTP Sensor 3P Connector Terminals
Courtesy of AMERICAN HONDA MOTOR CO., INC.
ο‘
5. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
FTP sensor 3P connector: disconnected
FTP sensor 3P connector No. 1: jumped to body ground
PCM connector A (49P): disconnected
Test circuit SG6
Test point 1 PCM connector A (49P) No. 10 (GRY)
Test point 2 Body ground
Fig. 202: Checking Continuity Between PCM Connector A (49P) No. 10 (GRY) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : The SG6 wire is OK. Update the PCM See PCM REMOVAL AND INSTALLATION or PCM
UPDATE if it does not have the latest software, or substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then do the repair verification .
NO : Repair an open in the SG6 wire between the PCM (A10) and the FTP sensor, then do the repair
verification .
REPAIR VERIFICATION (OBD STATUS CHECK)
ο‘
ο‘
ο‘
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1. Turn the ignition switch to LOCK (0).
2. Reconnect all connectors.
3. Turn the ignition switch to ON (II).
4. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
ο‘
ο‘
ο‘
5. DO THE PCM IDLE LEARN PROCEDURE .
6. Start the engine, and let it idle.
7. 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 PASSED?
PASSED : Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE . If any other Pending or Confirmed DTCs were
indicated, go to the indicated DTC's troubleshooting.
FAILED : Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then check the OBD STATUS again.
NOT COMPLETED : Keep idling until a result comes on.
DTC P0455: EVAP SYSTEM LARGE LEAK DETECTED
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