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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-0091: Shift Lock Solenoid. Signal Missing (Aw50/51 AWD; Aw55-50/51SN; 2004-2006) >> Signal missing >> Checks >> Checking the wiring and component

Checking the wiring and component

Check the cable between the control module for the gear selector and the shift lock solenoid connector (control module side). Check for an open-circuit according to Open-circuit, permanent faults .

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

When the brake pedal is not depressed the voltage should be 0 V. When the brake pedal is depressed the voltage should be battery voltage.

Replace the solenoid if the voltage is OK.

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