KOEO Self-Test
1) Start engine, and allow it to idle until it reaches operating temperature. If engine does not start or stalls after starting, continue KOEO SELF-TEST. DO NOT depress throttle.
2) Turn ignition off, and wait 10 seconds. Activate self-test procedure by using a jumper wire or appropriate test equipment. Turn ignition on, leaving engine off. Record all KOEO and Continuous Memory Codes.
3) If a Code 11 or 111 (pass code) is not received in KOEO portion of test, service KOEO codes. See KOEO SELF-TEST CODE REFERENCE table. If ECA will not output codes, go to TEST QA. If service codes are received:
- If CHECK ENGINE light was on when vehicle arrived for service, use recorded Continuous Memory Codes and CIRCUIT TEST listed in KOEO SELF-TEST CODE REFERENCE table before addressing any other symptoms.
- Use recorded Continuous Memory Codes and the KOEO SELF-TEST CODE REFERENCE table.
- If Continuous Memory Code 45 is retrieved, go to TEST N , step 15). If Continuous Memory Code 46, 48, 215, 216, 217, 232 or 238 is retrieved during KOEO SELF-TEST, see IGNITION SYSTEM in I - SYS/COMP TESTS - FUEL INJECTION article. If Codes 45, 46, 48, 215, 216, 217, 232 and 238 are not retrieved, go to TEST S , step 2).
- If vehicle has a no-start condition, go to TEST AA .
- If vehicle displays a Code 11 or 111 (pass code) and does not have any symptoms described in previous steps, go to COMPUTED TIMING CHECK .
KOEO SELF-TEST CODE REFERENCE
| Service Code | Circuit Test & Step No. | ||
|---|---|---|---|
| 112 | TEST DA , Step 20) | ||
| 113 | TEST DA , Step 10) | ||
| 114 | TEST DA , Step 1) | ||
| 116 | TEST DA , Step 1) | ||
| 117 | TEST DA , Step 20) | ||
| 118 | TEST DA , Step 10) | ||
| 121 | TEST DH , Step 2) | ||
| 122 | TEST DH , Step 10) | ||
| 123 | TEST DH , Step 3) | ||
| 126 | TEST DF , Step 1) | ||
| 158 | TEST DC , Step 20) | ||
| 159 | TEST DC , Step 1) | ||
| 226 | TEST N , Step 2) | ||
| 341 | TEST KP , Step 1) | ||
| 511 | (1) | ||
| 513 | (1) | ||
| 522 | TEST FA , Step 1) | ||
| 525 | TEST FA , Step 1) | ||
| 539 | TEST KM , Step 40) | ||
| 543 | TEST J , Step 30) | ||
| 556 | TEST J , Step 6) | ||
| 565 | TEST KD , Step 6) | ||
| 566 | TEST TB , Step 4) | ||
| 621 | TEST TB , Step 1) | ||
| 622 | TEST TB , Step 1) | ||
| 624 | TEST TB , Step 4) | ||
| 625 | TEST TB , Step 4) | ||
| 626 | TEST TB , Step 1) | ||
| 627 | TEST TB , Step 1) | ||
| 629 | TEST TB , Step 4) | ||
| 641 | TEST TB , Step 1) | ||
| 652 | TEST TB , Step 1) | ||
| 998 | TEST TB , Step 4) | ||
| No Codes Or Codes Not Listed | TEST QA , Step 1) | ||
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