Answer

Hi there,

 

If there is a fault with the engine management system, turning off the CEL is only temporary. The CEL would light up again.

 

Here are the procedures for getting the codes. You would need to read all the codes and let the codes recycle to the first code before you can erase the stored codes.

 

Diagnostic unit "A" ( DLC in diagram ) output socket No. 2 is used for fuel injection diagnosis, and socket No. 6 is used for ignition system diagnosis. Once function selector cable has been inserted in correct socket, depress button and keep depressed for more than one second (but not more than 3 seconds). Observe LED and count number of flashes to determine diagnostic trouble code, as faults stored in Electronic Control Unit (ECU) memory are read by observing LED flashes.

 

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Diagnostic system for fuel injection and ignition each store 13 codes. All codes contain 3 digits (example: 4-1-3). Since all codes have 3 digits, each code requires 3 series of flashes. A 3-second interval separates each series of flashes.

 

Write down the codes so that you can refer to them if you need to do diagnostics.

 

Once a cycle has been completed, follow the procedures to erase the codes.

 

1. Turn ignition on, with engine off. Press test button for more than 5 seconds. Release button. LED should light after 3 seconds.

 

2. Press button again for more than 5 seconds. Release button. LED should go out.

 

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Edited by AutoTech08 on 5/19/2009 at 1:57 PM