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Home >> Cadillac >> 2007 >> Escalade RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 753 (Automatic Transmission - 4L80-E/4L85-E - DTC P0218 To P2771) >> DTC P0730 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2006 GMC Sierra, 2006 GMC Cab & Chassis Sierra, 2006 Chevrolet Silverado, and 2006 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

The powertrain control module (PCM) calculates the gear ratio based on the automatic transmission input shaft speed sensor (AT ISS) and output shaft speed sensor (AT OSS) input. The PCM compares the known transmission gear ratio to the calculated ratio for the selected gear ranges. Refer to Shift Solenoid Valve State and Gear Ratio .

If the PCM detects an unknown transmission gear ratio, then DTC P0730 sets. DTC P0730 is a type C DTC.

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