What is diagnostic mode 3 on Nissan VG30E?
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. For VG30E with slotted switch: Turn the ‘diagnostic mode selector’ screw on the ECU fully clockwise.
Where is the diagnostic switch on a VG30i ECU?
The VG30i ECU’s have a tiny toggle switch on the side of the ECU with a small snap-in switch cover that must be utilized to select the diagnostic mode of the ECU. The 4-cylinder ECU and the VG30E ECU has a slotted switch that turns 1/4 or 1/2 turn clockwise and counterclockwise to do the same task. Some early 4-cyl HB ECU’s have the switch as well.
What does code 31 mean on Nissan D21?
Code 31 is coming up as the load signal malfunction. This is the signal that comes from the a/c compressor or alternator or steering pump when the engine is under additional load. It allows the computer to see the load and adjust idle speed higher to compensate.
What are the ECU flashes on a Nissan D21?
The ECU flashes codes 31 and 24 when placed into diagnostics mode. What do they mean? Hello…Here’s the OBD1 trouble codes table. The knock sensor does not really affect the engine performance and does not stop the engine from starting. The code 21 is for the ignition,check if you have spark and power and pulse to the ignition coil.
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. For VG30E with slotted switch: Turn the ‘diagnostic mode selector’ screw on the ECU fully clockwise. The check engine light will go out.
The VG30i ECU’s have a tiny toggle switch on the side of the ECU with a small snap-in switch cover that must be utilized to select the diagnostic mode of the ECU. The 4-cylinder ECU and the VG30E ECU has a slotted switch that turns 1/4 or 1/2 turn clockwise and counterclockwise to do the same task. Some early 4-cyl HB ECU’s have the switch as well.
How to do self diagnostics on a VG30i?
For VG30i: There is a little plastic tab you pull off of the side of the ECU (facing the door). A small toggle switch is behind it with 2 positions, “ON” and “DIAGNOSTICS”. Using a small screwdriver or tool, move it to the diagnostics position. The red and green LED’s on top of the ECU will blink simultaneously.
How can I tell if my idle control valve is working?
To check if an idle control valve is working properly, start by turning on your engine and letting it run for a minute or 2. Then, when it’s at an idling speed, take note of the RPMs in your car. Next, turn the engine off and disconnect the idle control motor under your hood.