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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1068 (Automatic Transaxle Diagnostics (DTC P0218 (3.4L) To DTC P0741 (3.4L)) - 4T65-E) >> Diagnostic Trouble Codes >> DTC P0730 (3.4L) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The PCM calculates the gear ratio based on data from the automatic transmission input speed sensor (ISS) and the vehicle speed sensor (VSS). The PCM compares the known transmission gear ratio to a calculated ratio for each gear range selected. The VSS output is translated to RPM and mph by the PCM for various uses. Refer to Range Reference .

If the PCM detects an incorrect gear ratio because of excessive slip within the transmission, then DTC P0730 sets. DTC P0730 is a type C DTC.

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