M35 Automatic Transmission Diagnostic Mode Procedure

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Hello everyone,

I came across the Nissan automatic transmission workshop manual for G35 as i have been trying to diagnose a problem with my A/T.

I'm not sure if they have the same Auto as the M35 (perhaps someone could confirm?), but the self diagnosis procedure works.

Here is the link for the manual: http://psedog.com/cars/fsm/g35/sedan/2003/at.pdf

I downloaded it and saved it to my pc for future reference.

So, it works the same way as the MIL, engine check light diagnostic mode and uses the OBDII system, however the "check A/T" light flashes instead and gives you the trouble code that way. Here is the procedure:

CHECK A/T CHECK INDICATOR LAMP
1. Start the engine with selector lever in “P” position. Warm engine to normal operating temperature.
2. Turn ignition switch ON and OFF at least twice, then leave it in the OFF.
3. Wait 10 seconds.
4. Turn ignition switch ON.
(Do not start engine.)
5. Does A/T CHECK indicator lamp come on for about 2 seconds?
YES >> continue...

JUDGEMENT PROCEDURE
1. Turn ignition switch OFF.
2. Push shift lock release button.
3. Move selector lever from “P” to “D” position.
4. Release accelerator pedal. (Set the closed throttle position signal “ON”.)
5. Depress brake pedal. (Brake switch signal “ON”.)
6. Turn ignition switch ON.
7. Wait 3 seconds.
8. Move the selector lever to the Manual shift gate side. (Manual mode switch “ON”.)
9. Release brake pedal. (Brake switch signal “OFF”.)
10. Move the selector lever to “D” position. (Manual mode switch “OFF”.)
11. Depress brake pedal. (Brake switch signal “ON”.)
12. Release brake pedal. (Brake switch signal “OFF”.)
13. Depress accelerator pedal fully and release it.

It will now flash the code. It starts with a long flash, then flashes 1 sec flashes. Count the short flashes between the long flashes and you will have your code. 17 flashes means there is no fault.

JUDGEMENT CODES:

1 = Revolution Sensor 1

2 = Direct Clutch Solenoid Valve

3 = Torque Converter Clutch Solenoid Valve

4 = Line Pressure Solenoid Valve

5 = Input Clutch Solenoid Valve

6 = Front Brake Solenoid Valve

7 = Low Coast Brake Solenoid Valve

8 = High and Low Reverse Clutch Solenoid Valve

9 = PNP Switch

10 = A/T Fluid Temperature Sensor

11 = Turbine Revolution Sensor

12 = A/T Interlock

13 = A/T 1st Engine Braking

14 = Start Signal

15 = Accelerator Pedal Position Sensor

16 = Engine Speed Signal

17 = CAN (Controller Area Network) which is basically the high speed communication line and signifies no fault.

To reset or clear codes, simply turn the ignition OFF

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The manual also explains how everything works in the A/T. Interesting read.