#1988 NISSAN 300ZX TURBO ECU DIAGNOSTICS HOW TO#
#1988 NISSAN 300ZX TURBO ECU DIAGNOSTICS CODE#

Run the engine at 2000 RPM for 2 minutes.

The Check Engine Light will be reading from the Driver's Side O2 sensor.

Once in MODE II (Diagnostics mode), start the car.

This test should be performed with the car fully warmed up. Starting the car while in MODE II (Diagnostics mode) will enter an Oxygen Sensor test mode.

#1988 NISSAN 300ZX TURBO ECU DIAGNOSTICS CODE#

The ECU practically never throws a code for a component simply giving a bad reading-doing so would require knowledge of what the reading should be, and such knowledge would make the presence of the sensor unnecessary. A most common fix for these codes is simply inspecting/cleaning the connector for the associated component. The code is for the crank angle sensor CIRCUIT-it's saying the connection to the CAS is open or completely out of range (ie.open). Code 11, for example, doesn't actually necessarily say that the crank angle sensor is bad. Please note: A common misconception is that the above codes indicate a failed sensor or part. Photographs above are from TTZD animated GIF is by Stadsport To get out of diagnostics mode without clearing codes, simply turn the car off. To clear codes, repeat steps 6 through 8.

#1988 NISSAN 300ZX TURBO ECU DIAGNOSTICS HOW TO#

The image below illustrates how to interpret these blinks as numerical codes. If there are multiple codes, they are displayed one after another. The first set of blinks (slow) are the first digit, and the second set of blinks (fast) are the second digit. The red LED on the ECU and the Check Engine Light on the dash will begin blinking codes simultaneously you can read either one.The ECU is now in diagnostics mode (MODE II. Turn the potentiometer fully counter-clockwise.Using a small flat-head screwdriver, rotate the potentiometer fully clockwise (the label indicates where to stop-don't force it past the stop).Locate the potentiometer and LED 'window' on the right-side of the ECU.Remove the 4 10mm bolts holding the wooden floorboard down.Pull back the carpet on the passenger side by the passenger's feet.On the ECU itself there is a potentiometer (fancy-talk for a tiny dial) that can be used to put the ECU into diagnostics mode.

1988 nissan 300zx turbo ecu diagnostics