Code 2-4-3 (Throttle Switch Signal Absent Or Faulty)

1993 Volvo 960 4D Wagon, AW30-43SECTION Code 2-4-3 (Throttle Switch Signal Absent Or Faulty)
  1. Enter test mode No. 2. See TEST MODE NO. 2 under RETRIEVING CODES. Turn throttle slightly. Throttle function is correct in idling position if flashing code 3-3-2 is displayed.
  2. Turn throttle to full-load position and release. Throttle function is correct in full-load position if flashing code 3-3-3 is displayed.
  3. Connect Measuring Unit (999-3070 ) to ECU. See CONNECTING MEASURING UNIT TO ECUΒ  . Turn ignition on. Connect voltmeter between measuring unit terminals No. 30 and 53. Voltmeter should indicate about 0.5 volts at idle and about 4.5 volts at full load.
  4. Connect voltmeter between measuring unit terminals No. 12 and 30. Voltmeter should indicate 5 volts. Turn ignition off. Ensure measuring unit terminal No. 30 is grounded. Connect an ohmmeter between measuring unit terminals No. 19 and 30. Ohmmeter should indicate zero ohms.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
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