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Discussion Starter #1
MIL on, two independent checks give PO 453 i.e., fuel tank pressure sensor (high voltage). I'm looking for the troubleshooting sequence. Thanks. j5
 

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DTC P0453 ’99-00, ’02-04 Models: FTP
Sensor Circuit High Voltage

1. Check the vacuum lines of the FTP sensor for misrouting, leakage, breakage, and clogging.
Are the vacuum lines OK?
YES - Go to step 2.
NO - Repair or replace vacuum lines as necessary.
2. Reset the PCM.
3. Remove the fuel fill cap.
4. Turn the ignition switch ON (II).
5. Monitor FTP sensor voltage with the HDS, or measure voltage between body ground and PCM connector terminal A29.
Is there about 2.5 V?
YES - Intermittent failure, systemis OK at this time.
Check for poor connections or loose terminals at the FTP sensor and the PCM.
NO - Go to step 6.
6. Turn the ignition switch OFF.
7. Reinstall the fuel fill cap.
8. Disconnect the FTP sensor 3P connector.
9. Turn the ignition switch ON (II).
10. Measure voltage between FTP sensor 3P connector terminals No. 1 and No. 2.
Is there about 5 V?
YES - Go to step 11.
NO - Repair open in the wire between the FTP sensor and the PCM (C18).
11. Measure voltage between FTP sensor 3P connector terminals No. 2 and No. 3.
Is there about 5 V?
YES - Replace the FTP sensor.
NO - Go to step 12.
12. Measure voltage between PCM connector terminals A29 and C18.
Is there about 5 V?
YES - Repair open in the wire between the FTP sensor and the PCM (A29).
NO - Substitute a known-good PCM and recheck. If normal voltage is indicated, replace the original PCM.
 

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Discussion Starter #3
Many thanks to this website and New Dad for the detailed instructions. Will go to work this weekend.
 
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