Self-diagnosis of Nissan Serena automatic transmission
Note: This self-test process only applies to Serena models with an older automatic transmission (3-speed or 4-speed).
Tools:
* Paperclip or piece of wire
Procedure:
1. Stop the engine.
2. Turn the ignition key to the “ON” position (but do not start the engine).
3. Locate the diagnostic connector under the steering column. It is usually yellow in color.
4. Insert a paperclip or wire into pin No. 2 of the diagnostic connector.
5. Start the engine immediately.
6. Pay attention to the “CHECK ENGINE” light on the instrument panel.
Reading fault codes:
The “CHECK ENGINE” light will flash in a certain sequence, indicating fault codes.
*Two long flashes followed by short flashes indicate the first fault code.
*One long flash followed by short flashes indicates a second fault code, etc.
Deciphering fault codes:
The following table contains fault codes and their meanings:
| Code | Description |
|—|—|
| 11 | Automatic transmission speed sensor |
| 12 | Solenoid N1 |
| 13 | Solenoid N2 |
| 14 | Torque converter lockup |
| 15 | Shift Solenoid |
| 16 | Throttle Position Sensor |
| 17 | Gearbox |
| 18 | Transmission Fluid Temperature Sensor |
Possible errors:
*If the “CHECK ENGINE” light does not flash, it means there are no stored trouble codes.
* If the “CHECK ENGINE” lamp flashes continuously, this indicates a malfunction in the self-diagnosis system.
Resetting fault codes:
* Stop the engine.
* Remove the paperclip or wire from the diagnostic connector.
*Wait a few seconds and reinsert the paperclip or wire.
* Start the engine and let it idle for a few minutes.
Note: Resetting trouble codes does not correct the root cause of the problem. It is necessary to contact a mechanic for further diagnosis and repair.