A/T Diagnostic Trouble Code Diagnosis

A/T DIAGNOSTIC TROUBLE CODE DIAGNOSIS
CHECK "N" RANGE LIGHT

N" range light flashing items:

N" range light flashing items:

The "N" range light flashes once per second if there is an abnormality in any of the items in the table below which are related to the A/T system. Check for diagnostic trouble codes if the "N" range light is flashing once per second.


CAUTION: If the "N" range light is flashing twice per second, it means that the A/T fluid temperature is too high. Stop the vehicle in a safe place and wait until the "N" range light switches off.

ON-BOARD DIAGNOSTICS
The Powertrain Control Module (PCM) monitors its input/output signals (some signals all the time and others under specified conditions). When an irregular signal is initially monitored, the PCM decides that a malfunction has occurred and records the occurrence as a diagnostic trouble code. There are 25 or 26 diagnostic items. The diagnostic results can be read with a scan tool. Diagnostic trouble codes are kept in memory by direct battery feed. The codes are retained in memory even if the ignition switch is in the "LOCK" (OFF) position.
Diagnostic trouble codes will, however, be erased when a battery terminal or the PCM connector is disconnected. In addition, the diagnostic trouble code can also be erased by the scan tool MUT-II (MB991502).


NOTE: If a sensor is disconnected when the ignition switch is in the "ON" position a diagnostic trouble code is memorized. In this case, erase the DTC using the scan tool.

The 25 or 26 diagnostic items are displayed in numeric order.