Diagnostic Trouble Code (DTC) Information TCM-P082601

Condition 

The circuit board of the gear selector module (GSM) houses three Hall sensors. permanent magnet on the gear selector lever influences the output signals from the sensors to the gear selector module (GSM). The automatic transmission remains in position D hydraulically when the gear selector is moved to the manual shifting position (+/-). hen the gear selector is moved up (+) the gear selector module (GSM) sends a signal to the transmission control module (TCM) to upshift. f the manual selector lever is moved down (+) the gear selector module (GSM) sends a signal to the transmission control module (TCM) to downshift.

The diagnostic trouble code (DTC) is stored if the control module detects that:

• The signals from the gear selector are not accurate for manual mode (+/-).

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

• Ignition on.

Fig 1: Identifying Gear Selector

Courtesy of VOLVO CARS CORPORATION

Substitute Value 

• No manual gear shift

Possible Source 

• Gear selector module (GSM) not working.

Fault symptom[s] 

• Changes gear as in position D in position MAN
• No gear shift