Test Description

WARNING: This page is about a different car, the 2002 GMC Savana Special, 2002 GMC Savana Camper Special, 2002 GMC Savana, and 2002 Chevrolet Chevy Express. 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 procedures.

2

This step determines if the failure condition is present.

4

This step determines if an open sensor ground circuit condition is present. Since the FTP sensor and FTT sensor share a sensor ground, an open condition between the splice and the AF ECM would 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.