Test J - EGR Vent & EGR Control Valve Output Circuit Check
- Codes 83 and 84. Turn ignition off and wait 10 seconds. Disconnect harness at EGR vent solenoid and EGR control solenoid. With DVOM on 200 ohm scale, measure resistance of solenoids. If both readings are 30-70 ohms, reconnect solenoids and go to next step. If either reading is less than 30 ohms or greater than 70 ohms, replace solenoid assembly and repeat Quick Test.
- Turn ignition on (engine off). With DVOM on 20 volt scale, connect positive lead to vehicle power circuit of EGR vent solenoid harness and negative lead to good ground. Repeat test on EGR control solenoid harness. If both readings greater than 10.5 volts, go to next step. If either reading less than 10.5 volts, repair open circuit and repeat Quick Test.
- Turn ignition off and wait 10 seconds. Disconnect 60-pin connector at ECA and inspect. Repair as required. Connect breakout box and leave ECA disconnected. With DVOM on 200 ohm scale, measure continuity from box pin 33 to EGR vent circuit at EGR vent solenoid harness. Then measure from box pin 52 to EGR control circuit at EGR control solenoid harness. If both readings less than 5 ohms, go to next step. If either reading 5 ohms or more, repair open circuit and repeat Quick Test.
- Turn ignition off and wait 10 seconds. Disconnect harness at EGR vent solenoid and EGR control solenoid. Breakout box installed and ECA disconnected. With DVOM on 200,000 ohm scale, measure resistance from box pin 33 to pins 37 and 57. Then measure from box pin 52 to same pins. If any reading less than 10,000 ohms, repair short to power and repeat Quick Test. If any reading 10,000 ohms or more, go to next step.
- Turn ignition off and wait 10 seconds. Breakout box installed and ECA and EGR vent and EGR control solenoids disconnected. With DVOM on 200,000 ohm scale, measure resistance from box pin 33 to pins 40, 46 and 60 in turn. Then measure from box pin 52 to same pins. If any reading less than 10,000 ohms, repair short to ground and repeat Quick Test. If any reading 10,000 ohms or more, replace ECA and repeat Quick Test.