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Home >> GMC >> 1999 >> Forward Control 6.5 F, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes - DTC P0704-P1272 >> DTC P0705 >> DTC P0705: Transaxle Range Switch Circuit (3.4L "N" Body) >> Circuit Description

Circuit Description

Transaxle range switch is a multi-signal switch that sends a signal indicating gear selection to Powertrain Control Module (PCM). Transaxle range switch uses 4 circuits to pull PCM voltage low in various combinations to indicate each gear range. Voltage level of circuits is represented as LO (grounded) or HI (open circuit). The 4 states displayed represents the encoder "P", "A", "B" and "C" inputs in sequence.

Conditions for setting DTC are: PCM recognizes an invalid PRNDL parameter, vehicle speed is greater than 5 MPH and conditions met for longer than 5 seconds.