Test Description

WARNING: This page is about a different car, the 2003 GMC Sierra and 2003 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers in the diagnostic procedure.

2

This step determines if the failure condition is present.

4

This step determines if an open sensor ground circuit condition is present. The Fuel Tank Pressure (FTP) and Fuel Tank Temperature (FTT) sensors share a common ground. An open circuit between the splice and the ground terminal will cause both signal circuits to indicate high voltage.

5

This step determines if an open or shorted signal circuit is the cause of the failure condition.

6

This step determines if a shorted 5-volt reference circuit is the cause of the failure condition.

7

This step determines if an open sensor ground circuit between the FTP connector and the circuit splice is the cause of the failure condition.