Diagnostic Aids

PCM will indicate a DTC P1510 as long as the ignition is On. As soon as the ignition is turned Off the PCM will lose memory of DTC P1510 and P1510 will not be stored.

Check for an open fuse. Replace any open fuses and retest.

If the DTC P1510 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 P1510 diagnostic on the scan tool under the Not Ran Since Code Cleared selection in the DTC Information menu. If DTC P1510 appears in the Not Ran Since Code Cleared list, the P1510 diagnostic has not yet run. When DTC P1510 does not appear in the Not Ran Since Code Cleared list, the P1510 diagnostic has run. If the MIL is NOT illuminated and there is no Pending DTC Status in DTC Information, the P1510 diagnostic has passed. The DTCs MUST be cleared in order to view the Current Status of the Not Ran Since Code Cleared list. The Not Ran Since Code Cleared list only indicates whether or not 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 problem in the battery positive voltage circuit. Inspect the wiring harness and components for an intermittent condition. Refer to INTERMITTENT CONDITIONS  under SELF-DIAGNOSTIC SYSTEM.