Test Mode No. 3 (Operating Components In A Certain Order)

This function is activated by briefly pressing test button on Volvo diagnostic unit 3 times. Electronic Control Module (ECM) will respond by activating listed components in order. This sequence is repeated twice. Test mode No. 3 cannot be activated while engine is running. The following components are operated:

• EGR vacuum controller.
• Turbocharger (TC) control valve.
• EVAP valve.
• Engine cooling fan, low speed.
• Engine cooling fan, high speed.
• Injectors.
• IAC valve.
• A/C relay.
• RPM (tachometer indicates 1250-1500 RPM).