Test Description
The numbers below refer to the step numbers on the diagnostic table.
- 2: This step determines if the condition is present.
- 4: This step tests the signal circuit of the FTP sensor.
- 5: This step tests the ground circuit of the FTP sensor.
- 6: This step tests the 5-volt reference circuit of the FTP sensor.
DTC P0453
| Step | Action | Values | Yes | No |
|---|---|---|---|---|
| Schematic Reference: Engine Controls Schematics Connector End View Reference: Powertrain Control Module (PCM) Connector End Views or Engine Controls Connector End Views |
||||
| 1 | Did you perform the Diagnostic System Check - Vehicle? | - | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
| 2 |
|
4.3 V | Go to Step 4 | Go to Step 3 |
| 3 |
|
- | Go to Step 4 | Go to Intermittent Conditions |
| 4 |
|
0.2 V | Go to Step 7 | Go to Step 5 |
| 5 | Probe the low reference circuit of the FTP sensor with a test lamp that is connected to battery voltage. Refer to Probing Electrical Connectors
in Wiring Systems. Does the test lamp illuminate? |
- | Go to Step 6 | Go to Step 8 |
| 6 | Measure the voltage of the FTP 5-volt reference circuit with a DMM. Refer to Circuit Testing
in Wiring Systems. Does the FTP 5-volt reference measure within the specified value? |
4.8-5.2 V | Go to Step 10 | Go to Step 11 |
| 7 | Test the FTP signal circuit for a short to voltage or for a short to a 5-volt reference circuit. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 8 | Test the FTP low reference circuit for an open. Refer to Circuit Testing
and Wiring Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 9 |
| 9 | Test for an intermittent and for a poor connection at the control module. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 13 |
| 10 | Test for an intermittent and for a poor connection at the FTP sensor. Refer to Testing for Intermittent Conditions and Poor Connections
and Connector Repairs
in Wiring Systems. Did you find and correct the condition? |
- | Go to Step 14 | Go to Step 12 |
| 11 | Repair the short to voltage in the FTP 5-volt reference circuit. Refer to Wiring Repairs
in Wiring Systems. Did you complete the repair? |
- | Go to Step 14 | - |
| 12 | Replace the FTP sensor. Refer to Fuel Tank Pressure Sensor Replacement
. Did you complete the replacement? |
- | Go to Step 14 | - |
| 13 | Replace the powertrain control module (PCM). Refer to Control Module References
in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? |
- | Go to Step 14 | - |
| 14 |
|
- | Go to Step 2 | Go to Step 15 |
| 15 | Observe the Capture Info with a scan tool. Are there any DTCs that have not been diagnosed? |
- | Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information | System OK |