P1410

Circuit Description
The Tank Pressure Control Valve is operated by a vacuum signal from the Evaporative Emission (EVAP) tank pressure control solenoid valve. The EVAP tank pressure control solenoid valve is controlled by the Powertrain Control Module (PCM). The PCM opens the tank pressure control valve when the engine is running and the fuel level is within a specified range. The tank pressure control valve opens in order to allow the unrestricted flow of fuel vapors from the fuel tank to the EVAP canister. The DTC P1410 diagnostic monitors the EVAP tank pressure control solenoid valve circuit voltage.

Conditions for Running the DTC
The ignition is On or the engine is running.

Conditions for Setting the DTC
The PCM does not detect the expected voltage in the solenoid control circuit, with the fuel level higher than a specified value when the diagnostic runs.

Action Taken When the DTC Sets
^ The PCM illuminates the Malfunction Indicator Lamp (MIL) after two consecutive ignition cycles in which the diagnostic runs with the fault active.
^ The PCM records the operating conditions at the time the diagnostic fails. This information is stored in the Freeze Frame buffer.

Conditions for Clearing the MIL/DTC
^ The MIL turns off after three consecutively passing trips without a fault present.
^ A history DTC clears after 40 consecutive warm-up cycles without a fault.
^ Perform the scan tool Clear DTC Information function.

Diagnostic Aids
Test the operation of the EVAP tank pressure control solenoid valve. Refer to EVAP Control System Diagnosis. Component Tests and General Diagnostics

If the DTC P1410 is intermittent, driving the vehicle under the following conditions can verify whether the fault is present. Perform the scan tool Clear DTC Information function. Road test the vehicle while monitoring the DTC P1410 diagnostic on the scan tool under the Not Ran Since Code Cleared selection in the DTC Information menu. If a DTC P1410 appears in the Not Ran Since Code Cleared list, the P1410 diagnostic has not yet run. When the DTC P1410 does not appear in the Not Ran Since Code Cleared list, the P1410 diagnostic has run. If the MIL is NOT ILLUMINATED, and there is no PENDING DTC Status in DTC Information, the P1410 diagnostic has passed. DTCs MUST BE CLEARED in order to view the CURRENT STATUS of the Not Ran Since Code Cleared list. DO NOT FORGET that the Not Ran Since Code Cleared list only indicates that the test has run, not whether the test passed or failed. The DTC Information screen must be checked for CURRENT or PENDING status, in order to determine the outcome of the diagnostic test involved.

An intermittent malfunction may be caused by a fault in the fuel tank pressure sensor circuit. Inspect the wiring harness and components for any of the following conditions:
^ Backed out terminals
^ Improper mating of terminals
^ Broken electrical connector locks
^ Improperly formed or damaged terminals
^ Faulty terminal to wire connections
^ Physical damage to the wiring harness
^ A broken wire inside the insulation
^ Corrosion of electrical connections, splices, or terminals

If a DTC P1410 cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.

Test Description
The numbers below refer to the step numbers in the diagnostic table.
1. The Powertrain OBD System Check prompts the technician to complete some basic checks and store the Freeze Frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
2. The DTC P1410 diagnostic depends on correct fuel tank level readings in order to accurately detect a malfunction of the EVAP tank pressure control solenoid valve.
3. This step checks whether the condition that caused the DTC P1410 is still present.
6. This step checks the control side operation of the EVAP tank pressure control solenoid valve.
11. This step checks whether the malfunction that caused the DTC P1410 is still present. Driving the vehicle under these conditions will verify whether the fault is present. After performing the scan tool Clear DTC Information function, the DTC P1410 diagnostic can be monitored on the scan tool under the Not Ran Since Code Cleared selection in the DTC Information menu. If a DTC P1410 appears in the Not Ran Since Code Cleared list, the P1410 diagnostic has not yet run. When the DTC P1410 does not appear in the Not Ran Since Code Cleared list, the P1410 diagnostic has run. If the MIL is NOT ILLUMINATED and there is no PENDING DTC Status in DTC Information, the P1410 diagnostic has passed. DTCs MUST BE CLEARED in order to view the CURRENT STATUS of the Not Ran Since Code Cleared list. DO NOT FORGET that the Not Ran Since Code Cleared list only indicates that the test has run, not whether the test passed or failed. The DTC Information screen must be checked for CURRENT or PENDING status, in order to determine the outcome of the diagnostic test involved.