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Home >> Volvo >> 1993 >> 960 4D Wagon, AW30-40 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Fault Code Testing >> Code 2-2-3 (No Idle Valve Signal)
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Code 2-2-3 (No Idle Valve Signal)

  1. Check operation of idle valve in test mode No. 3. See TEST MODE NO. 3 under RETRIEVING CODES. If valve does not operate, check wiring.
  2. Connect Measuring Unit (999-3070 ) to ECU. See CONNECTING MEASURING UNIT TO ECU  . Start engine. Connect voltmeter between measuring unit terminals No. 4 and 24. Approximately 11 volts should be present. Connect voltmeter between measuring unit terminals No. 22 and 24. Approximately 7.5 volts should be present.
  3. Turn engine off (ignition on). Using a voltmeter, check voltage at measuring unit terminals No. 4 and 22. Voltage should be approximately 8-9 volts. If no voltage is present, check wiring to idle valve.
  4. Turn ignition off. Using an ohmmeter, check resistance across measuring unit terminals No. 4 and 22. Resistance should be approximately 25 ohms. If not, replace idle valve.
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