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DTC P0453: Ftp Sensor Input High: Testing

NOTE: Record freeze frame data. Check for service bulletins and on-line information.
  1. Connect scan tool to DLC-2. Turn ignition on. Check FTP V PID. If PID is more than 4.8 volts, go to next step. If PID is 4.8 volts or less, problem is not present. Check for intermittent problem. See TROUBLE SHOOTING - NO CODES article.
  2. Turn ignition off. Disconnect FTP sensor connector. Check connector terminals. If problem is not present, go to next step. If connection or terminals are loose, damaged or corroded, repair as necessary and go to step  11 .
  3. Check continuity between FTP sensor harness connector terminal "B" (Black/Orange wire) and ground. See FTP SENSOR TERMINAL IDENTIFICATION  table. If continuity is not present, go to next step. If continuity is present, go to step  5 .
  4. Disconnect 3-pin harness connector B1-21, located about 3 inches from FTP sensor connector, near charcoal canister. Check continuity between male 3-pin harness connector B1-21 terminal "B" (Black/Orange wire) and ground. If continuity is not present, repair open in Black/Orange wire between female 3-pin harness connector B1-21 terminal "B" and FTP sensor harness connector terminal "B". If continuity is present, repair open in Brown/Yellow wire between PCM harness connector terminal No. 91 and female 3-pin harness connector B1-21 terminal "B". See Figure . See WIRING DIAGRAMS article. Go to step  11 .
  5. Check 3-pin harness connector B1-21 for loose, damaged or corroded terminals. If problems are not present, go to next step. If any problems are present, repair as necessary and go to step  11 .
  6. Check continuity between male 3-pin harness connector B1-21 terminals "A" (Red wire) and "C" (Pink/Blue wire). If continuity is not present, go to next step. If continuity is present, repair short across Red and Pink/Blue wires between 3-pin harness connector B1-21 and FTP sensor harness connector. Go to step  11 .
  7. Check continuity of Red wire between male 3-pin harness connector B1-21 terminal "A" and FTP sensor harness connector terminal "A". If continuity is present, go to next step. If continuity is not present, repair open in Red wire between male 3-pin harness connector B1-21 terminal "A" and FTP sensor harness connector terminal "A". See WIRING DIAGRAMS article. Go to step  11 .
  8. Disconnect PCM harness connector. PCM is mounted to passenger floor, behind glove box. Check connector terminals. If problem is not present, go to next step. If connection or terminals are loose, damaged or corroded, repair as necessary and go to step  11 .
  9. Check continuity between female 3-pin harness connector B1-21 terminals "A" (Red/Black wire) and "C" (Pink/Blue). If continuity is not present, go to next step. If continuity is present, repair short across Red/Black and Pink/Blue wires between 3-pin harness connector B1-21 and PCM harness connector. See FTP SENSOR TERMINAL IDENTIFICATION  table. Go to step  11 .
  10. Connect breakout box to PCM harness connector. Do not connect PCM. Check continuity between female 3-pin harness connector B1-21 terminal "A" (Red/Black wire) and breakout box terminal No. 62. If continuity is present, go to next step. If continuity is not present, repair open in Red/Black wire between 3-pin harness connector B1-21 and PCM harness connector terminal No. 62. See Figure . See WIRING DIAGRAMS article. Go to next step.
  11. Reconnect all components. Turn ignition on. Using scan tool, clear DTC. Start engine. Ensure FTP V PID is .2-4.8 volts when ECT V PID is less than 176°F. Recheck DTCs. If DTC P0453 is pending, replace PCM and go to next step. If DTC P0453 is not pending, go to next step.
  12. Perform after repair procedure. See AFTER REPAIR PROCEDURE  . If DTC is not present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.
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