Displaying & Reading Trouble Codes

Inspection Procedure

CAUTION: Do not connect two connectors of the EC-AT Tester (and EC-AT Selector) to the EC-AT control unit at the same time.













1. Connect the SST (System Selector) to the diagnosis connector.
2. Set switch (A) to position 1. [Except B6 SOHC (California)] Set switch (A) to position 2. (B6 SOHC (California)]
3. Set the TEST SW to SELF-TEST position.
4. Connect the SST (EC-AT Tester or Self-Diagnosis Checker) to the System Selector and a ground.
5. Set the select switch to position A.

NOTE: [ ] Indicates B6 SOHC (except California), BP SOHC and BP DOHC engine.

6. Turn the ignition switch to ON.






7. Verify that "88" flashes on the digital display and that the buzzer sounds for 3 seconds.
8. It "88" does not flash, check the diagnosis connector wiring.
9. If "88" flashes and the buzzer sounds continuously for more than 20 seconds, check for a short circuit between the EC-AT control unit terminal 1 C [1F] and the diagnosis connector. If necessary, replace the EC-AT control unit and repeat from Step 2.
10. Note any code numbers and check for the causes. Repair as necessary.




NOTE: After repairs are made, recheck for code numbers by performing the "After-Repair Procedure".

General Notes



1. If there is more than one malfunction, the code numbers will be indicated in numerical order, lowest number first.




2. When the TAT [[TEN] terminal of the diagnosis connector is not grounded, the indicator flashes at a constant frequency until the malfunction is repaired. However, the service code is memorized in the EC-AT control unit.




3. The EC-AT control unit has a built-in fail-safe function for the throttle sensor, the speed sensors, and all the solenoids. If a malfunction occurs, the EC-AT control unit will control operation of the remaining components according to a preset fail-safe program.
The vehicle may still be driven, although driving performance will be slightly affected.




4. To cancel the service codes from the memory, disconnect the negative battery cable for at least 20 seconds and then depress the brake pedal.


Circuit Diagram