Without Scan Tool

HOW TO DISPLAY AND READ DIAGNOSTIC TROUBLE CODES WITHOUT SCAN TOOL

To obtain an output of diagnostic codes, proceed as follows:

1. Initial Conditions.
a. Battery voltage 11 volts or more.
b. Throttle valve fully closed.
c. Transmission in neutral position.
d. Accessories switched "OFF".

2. Turn the ignition switch to "ON". Do not start the engine.




3. Using a service wire, short circuit both terminals of the check engine connector.




4. Read the diagnostic code as indicated by the number of flashes of the "CHECK ENGINE" warning light.

Diagnostic Code




a. Normal System Operation (no malfunction)
The light will blink continuously.




b. Malfunction Code Indication.
The light will blink a number of times equal to the malfunction code indication with a 2.4 second interval between each indication.
After all the codes have been output, there will be a 4.5 second pause, and they will be repeated as long as the check connector terminals and are shorted.




NOTE: In the event of a number of troubles codes, indication will begin from the smaller value and continue in order to the larger.




5. After the diagnosis check, remove the service wire.