Diagnostic Test Mode No. 1
- 850 is equipped with on-board diagnostics to help locate and repair instrument cluster faults. To enter diagnostics, turn ignition on. Locate diagnostic unit "A" in right front area of engine compartment. See Fig 1
. Place diagnostic cable in diagnostic unit "A", socket No. 7. Briefly push test button, located on diagnostic unit, once. System is now in diagnostic test mode No. 1.
Courtesy of VOLVO CARS OF NORTH AMERICA.
- Count number of times LED on diagnostic unit flashes and note 3-digit fault code. See INSTRUMENT CLUSTER DIAGNOSTIC FAULT CODES (1995)
. Push button again to determine whether more trouble codes have been set. Codes are displayed in same sequence as they were set. After all stored codes have been displayed, display will begin again with first code in sequence.