LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> BMW >> 1985 >> 528e Automatic >> Repair and Diagnosis >> Engine Performance >> System >> MOTRONIC CEC System >> Testing >> Test 5: Idle Control Valve
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test 5: Idle Control Valve

  1. Valve should be open when vehicle is at rest (no voltage to valve). When voltage is applied to valve (engine on), valve should close. Remove 2 valve hoses and observe valve operation. If valve does not operate as described, replace valve.
  2. If valve operates properly, pull off connector plug and connect voltmeter between the 2 wires in plug. Start engine and turn A/C on. Voltmeter should read battery voltage. If it does not, check Idle Control Unit. See TEST 7: IDLE CONTROL UNIT  .
scientia non olet · About LEMON Manuals