LEMON Manuals: Even more car manuals for everyone
Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Component Tests (1995) >> Tachometer Test >> Tachometer Shows Incorrect Value

Tachometer Shows Incorrect Value

  1. Turn ignition on. Activate diagnostic test mode No. 3. See ON-BOARD DIAGNOSTICS (1995 MODELS)  under SYSTEM TESTING. Tachometer needle should go to vertical position. If tachometer needle significantly varies from vertical position, check ignition ECU by activating test mode No. 3 on diagnostic unit "A", but placing socket in terminal No. 6. See Figure . If no fault is found in ignition ECU, replace instrument cluster. If tachometer needle goes to vertical position, go to next step.
  2. Check ground circuit wiring between instrument cluster connector 30-pin connector terminal A15 (Brown wire) and ground. If ground circuit is okay, replace instrument cluster.
scientia non olet · About LEMON Manuals