With Self-Diagnosis Checker & System Selector Tools

Inspection Procedure
1. Connect the System Selector (SST) to the data link connector.
2. Set switch A to position 1.
3. Set the test switch to SELF TEST.



4. Connect the Self-Diagnosis Checker to the System Selector (SST) and a ground.
5. Set the select switch to position A.
6. Turn the ignition switch ON.
7. Verify that "88" flashes on the digital display and the buzzer sounds for 3 seconds after turning the ignition switch ON.
8. If "88" does not flash, check the main relay, power supply circuit, and data link connector wiring.
9. If "88" flashes and the buzzer sounds continuously for more than 20 seconds, check for a short circuit between the ECM terminal 1F and the data link connector. Replace the ECM if necessary and perform Steps 3 through 7 again.



10. Note any code numbers and check for the causes. Repair as necessary.
11. After repairs, cancel the code numbers by performing the "After-repair procedure".

Principle of Code Cycle
Diagnostic trouble codes are determined as shown below.




Code cycle break
The time between diagnostic trouble code cycles is 4.0 seconds.




Second digit of diagnostic trouble code (ones position)
The digit in the ones position of the diagnostic trouble code represents the number of times the checker buzzer sounds 0.4 second during one cycle.




First digit of diagnostic trouble code (tens position)
The digit in the tens position of the diagnostic trouble code represents the number of times the checker buzzer sounds 1.2 seconds during one cycle.
The buzzer remains off for 1.6 seconds between the long and short pulses.