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Test Dr-18A - Testing Purge System

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. Connect DRB-II and adapter to diagnostic connector. Using DRB-II, actuate purge control solenoid. Listen for purge control solenoid to click. If purge control solenoid clicks, inspect purge control vacuum system. Repair as necessary. Perform TEST VER-2. If purge control vacuum system is okay, perform TEST DR-19A.
  2. If purge control solenoid does not click, disconnect purge control solenoid connector. Measure voltage at purge control solenoid connector terminal No. 2 (Yellow/White wire). If voltage is less than 10 volts, repair open Yellow/White wire between purge control solenoid and splice. Perform TEST VER-2. If voltage is more than 10 volts, turn ignition switch to OFF position.
  3. Disconnect Electronic Control Unit (ECU) 18-pin connector. Measure resistance of Black/White wire between ECU 18-pin connector terminal No. 62 and purge control solenoid connector terminal No. 1. If resistance is more than 10 ohms, repair open Black/White wire. Perform TEST VER-2.
  4. If resistance is less than 10 ohms, measure resistance between purge control solenoid connector terminal No. 1 (Black/White wire) and ground. If resistance is more than 10 ohms, replace purge control solenoid. Perform TEST VER-2. If resistance is less than 10 ohms, repair Black/White wire for a short to ground. Perform TEST VER-2.
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