What Is A Common Problem For Code P0705 On 2005 Chevy Equinox?


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Circuit Description
The transmission range (TR) switch is part of the park/neutral position and back-up lamp switch assembly and is mounted on the transmission manual shaft. The TR switch is a multi-signal switch. The transmission control module (TCM) supplies voltage to the TR switch. Each gear selector lever position grounds one or more of the signal circuits in a unique pattern. In order to determine the gear range selected by the driver, the TCM compares the voltage combination on the signal circuits to a TR switch combination table stored in memory.

When the TCM detects an invalid combination of TR switch signals, then DTC P0705 sets. DTC P0705 is a type A DTC.

DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0705 Transmission Range (TR) Switch Circuit

Conditions for Running the DTC

The system voltage is 8 - 18 volts .
The engine is running.
Conditions for Setting the DTC
The combination of TR switch signals is invalid for 5 seconds.

Action Taken When the DTC Sets

The TCM turns the Trans. Protection Mode ON. When the Trans. Protection Mode is ON, the following conditions occur:
The transmission will operate in 5th gear when the transmission is shifted into D or 1 range and 2nd gear when shifted into L range.
The line pressure is at maximum.
The torque converter clutch (TCC) is disabled.
The TCM freezes the transmission adaptive functions.
The TCM requests the powertrain control module (PCM) to illuminate the malfunction indicator lamp (MIL).
The TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as Failure Records.
The TCM stores DTC P0705 in TCM history.
Conditions for Clearing the MIL/DTC

The PCM turns off the MIL after the third consecutive drive trip in which the TCM does not send a MIL illumination request.
A scan tool can clear the MIL/DTC.
The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without an emission-related diagnostic fault occurring.
The TCM cancels the DTC default actions when the ignition switch is OFF long enough in order to power down the TCM.

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