Without Scan Tool

DIAGNOSIS SYSTEM
The automatic transmission has built-in self-diagnostic functions. If the malfunction occurs in the system, the Engine Control Module (ECM) stores the diagnostic trouble code in memory and the O/D OFF (Overdrive OFF) indicator light blinks to inform the driver. The diagnostic trouble code stored in memory can be read out by the following procedure.




O/D OFF INDICATOR LIGHT INSPECTION
1. Turn the ignition switch to ON.
2. Check if the O/D OFF indicator light lights up when the O/D main switch is pushed out to OFF and goes off when the O/D main switch is pushed in to ON.

HINT:
- If the O/D OFF indicator light does not light up or stay on all the time. carry out the check for "O/D OFF Indicator Light Circuit on page.
- If the O/D OFF indicator light blinks, a trouble code is stored in the ECM memory.

HOW TO DISPLAY AND READ DIAGNOSTIC TROUBLE CODES
1. Turn the ignition switch ON, but do not start the engine.
2. Push in the O/D main switch to ON.

HINT: Warning and diagnostic trouble codes can be read only when the O/D main switch is ON. If it is OFF, the O/D OFF indicator light up will light continuously and will not blink.




3. Using SST, connect terminals TE1 and E1 of the DLC1 or DLC2.

SST 09843-18020




4. Read the diagnostic trouble code indicated by the number of times the O/D OFF indicator light blinks.

HINT: If the system is operating normally, the light will blink 2 times per second.




The trouble code is indicated as shown in the illustration at left (Diagnostic trouble code "42 is shown as an example).

HINT: When 2 or more trouble codes are stored in memory, the lower-numbered code is displayed first. If no diagnostic trouble code is output, or if a diagnostic trouble code is output even though no diagnostic trouble code output operation is performed, check the TE1 terminal circuit.