Meaning: One red flash and two green flashes means code 12.Ĥ. Note each code as it is displayed, the red LED flashing once for 10's, and the green LED flashing once for 1's. After about five seconds it will start to output out the diagnostic codes as with the 4-cylinder ECU. After it blinks both LED's 3 times move the toggle switch back to the on position. Wait 5 seconds, then turn the screw fully counter clockwise.ģ. Mode 3 is the most commonly used mode and will yield the ECU trouble codes you need to figure out what's going on with your engine.įor VG30E with slotted switch: Turn the 'diagnostic mode selector' screw on the ECU fully clockwise. One time, pause, then 2 times, three times, pause.so on for each mode, 1 through 5. The red and green LED's on top of the ECU will blink simultaneously. Using a small screwdriver or tool, move it to the diagnostics position. A small toggle switch is behind it with 2 positions, "ON" and "DIAGNOSTICS". For VG30i: There is a little plastic tab you pull off of the side of the ECU (facing the door). Light is flashing and the ECU will keep all stored codes and the check engine light will remain on.ġ. To keep the codes stored, simply turn the key off as the check engine Wait 5 seconds, then turn the screw fully counter clockwise.ĥ. To clear all computer codes and turn the check engine light off, turn the screw fully clockwise while it is in diagnostic mode. The long flash(s) = 1st digit short flashes = 2nd digit.Ĥ. The check engine light will then begin to flash stored fault codes. Turn the 'diagnostic mode selector' screw on the computer fully clockwise. computers have either a small toggle switch on the side of the ECU box or, a slotted mode selector screw that turns 1/4 or 1/2 turn clockwise and counterclockwise to do the same task.ġ. Access to the computer is gained by sliding the seat forward or, by removing the seat entirely. Nissan Truck/Car OBD 1 Codes and Code Retrievalġ986-1989 D21 Nissan Hardbody Truck Codes
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