LEMON Manuals: Even more car manuals for everyone
Home >> International >> 1972 >> DM10 4.3L Eng >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Speed Controlled Spark >> Testing >> Solenoid Valve and Speed Sensor Electrical Tests

Solenoid Valve and Speed Sensor Electrical Tests

  1. Check electrical supply circuit (from ignition switch) by disconnecting wiring harness connector from solenoid valve. Insert a test light between connector and ground (see Fig 1). Turn ignition switch to "ON", test light should light if circuit is operating properly. If test light does not light, supply circuit from ignition switch is faulty and should be repaired.
  2. Check solenoid valve by disconnecting wiring harness connector from valve. Install a short jumper between harness connector and solenoid valve (see Fig 1). Install a second jumper between remaining solenoid terminal and ground. Turn ignition switch to "ON", solenoid valve should open (a distinct click should be heard). Recheck air flow through solenoid valve, See VACUUM CONTROL VALVE . If solenoid does not operate properly, replace solenoid valve.
    Fig 1: SOLENOID VACUUM VALVE ELECTRICAL TEST
    G09325392Courtesy of NOT AVAILABLE
  3. Check continuity of speed sensor by disconnecting harness connector from solenoid valve. Install a test light from harness connector to vehicle battery (see Fig 2). If test lamp lights, speed sensor and associated wiring are satisfactory. If test light did not light and associated wiring is good, replace speed sensor.
    Fig 2: SPEED SENSOR CONTINUITY TEST
    G09325393Courtesy of NOT AVAILABLE
scientia non olet · About LEMON Manuals