Displaying & Reading Trouble Codes

CHECK "O/D OFF" INDICATOR LIGHT
1. Turn the ignition switch ON.
2. The "O/D OF F" light will come on when the O/D switch is placed at OFF.
3. When the O/D switch is set to ON, the "O/D OFF" light should go out.

^ If the "O/D OFF" light flashes when the O/D switch is set to ON, the electronic control system is faulty.





READ DIAGNOSTIC CODE

1. TURN IGNITION SWITCH AND O/D SWITCH TO ON
Do not start the engine.

NOTE: Warning and diagnostic codes can be read only when the overdrive switch is ON. If OFF, the overdrive OFF light will light continuously and will not blink.





2. SHORT DG TERMINAL CIRCUIT
Using a service wire, short the DG terminal and body ground.





3. READ DIAGNOSTIC CODE
Read the diagnostic code as indicated by the number of times the O/D OFF light flashes.





Diagnostic Code Indication
^ If the system is operating normally, the light will blink once every 0.25 seconds.





^ In the event of a malfunction, the light will blink once every 0.5 seconds. The number of blinks will equal the first number and, after 1.5 seconds pause, the second number of the two digit diagnostic code. If there are two or more codes, there will be a 2.5 seconds pause between each.

NOTE: In the event of several trouble codes occuring simultaneously, indication will begin from the smaller value and continue to the larger.

4. REMOVE SERVICE WIRE