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Home >> Volvo >> 2004 >> S80 Base, 2.5 59, FWD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) Diagnostic Trouble Codes - 4 Of 5 >> TCM-0090: Shift Lock Solenoid. Signal Too High (Aw50/51 AWD; Aw55-50/51SN; 2004-2006) >> Signal too high >> Checks >> Checking the wiring and component

Checking the wiring and component

Check the cable between the control module for the gear selector and the solenoid connector. Check for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

Check the voltage between terminals #1 and #2 on the solenoid connector (female half).

When the ignition is on and the brake pedal is not depressed the voltage should be 0 V. When the brake pedal is depressed the voltage should be Ubat.

Replace the solenoid if the voltage is OK.

Other information 

Fig 1: Identifying Volts Display
GLL101041Courtesy of VOLVO CARS OF NORTH AMERICA.