Reading Diagnostic Trouble Codes

1. Connect the SSTs (Special Service Tool) to the data link connector and a ground.
2. Set the select switch to position A.




3. Set the System Selector to position 1 and TEST SW to SELF TEST as shown.
4. Turn the ignition switch to ON.




5. Verify that 88 flashes on the digital display and that the buzzer sounds for 3 sec. after turning the ignition switch ON.
6. If 88 does not flash, check the main relay, power supply circuit, and check connector wiring.
7. If 88 flashes and the buzzer continues for more than 20 sec., check for a short circuit between the engine control module terminal 1 E and the data link connector. Replace the engine control module if necessary and perform steps 3 and 4 again.
8. Note any code numbers and check for the causes by referring to the check sequences. Repair as necessary.
9. After repairs, cancel the code numbers by performing "After-repair Procedure".

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




1. Code cycle break
The time between diagnostic trouble code cycles is 4.0 seconds (the time the lamp is off).




2. 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 buzzer sounds for 0.4 second during one cycle.




3. 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 buzzer sounds for 1.2 seconds during one cycle.

Note: The light goes out for 1.6 seconds between the long and short pulses of the buzzer.


Note: If more than one failure is present, the code numbers will be indicated in numerical order.