Test Mode No. 1 (Retrieving Codes)
- ECU can record 18 fault codes. Fault codes stored in memory can be displayed by pressing test button "A" on diagnostic unit for an instant. Control unit memory can retain codes from 10 minutes to 24 hours after interruption of electrical supply.
- Control unit will begin to use a faulty or missing signal immediately after it has been corrected rather than remaining in limp-home mode. Fault code, however, will remain in memory.
- To retrieve codes, open diagnostic unit cover and connect test lead to socket No. 2. Turn ignition on. Enter test mode No. 1 by pressing test button once for 1-3 seconds.
- Observe LED, and count number of flashes in 3 digit series comprising a fault code. Because series are displayed at 3-second intervals, codes can be easily distinguished.
- If a fault code is retrieved, refer to FAULT CODES table under FAULT CODE DEFINITION. Depress push button again, and check for additional codes. Depress push button a third time if necessary. If first code repeats, no other codes are present. Control unit can store all 18 codes simultaneously.