KOEO Self-Test
WARNING: This page is about a different car, the 1993 Mazda Navajo. However, it is still accessible from the selected car via links, so may be relevant.
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 111 (pass code) is not received in KOEO portion of test, service KOEO codes. See KOEO SELF-TEST CODE REFERENCE table. If PCM will not output codes, go to CIRCUIT TEST QA. If service codes are received, proceed as follows:
- 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.
- If Continuous Memory Code 215 is retrieved, go to CIRCUIT TEST N, step 3). If Continuous Memory Code 216, 217, 232 or 238 is retrieved during KOEO SELF-TEST, see IGNITION SYSTEM in appropriate I - SYS/COMP TESTS article. If Codes 215, 216, 217, 232 and 238 are not retrieved, go to CIRCUIT TEST S, step 2).
- If vehicle has a no-start condition, go to CIRCUIT TEST AA.
- If vehicle displays a Code 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 | DA, Step 10) | ||
| 113 | DA, Step 10) | ||
| 114 | DA, Step 1) | ||
| 116 | DA, Step 1) | ||
| 117 | DA, Step 10) | ||
| 118 | DA, Step 10) | ||
| 121 | DH, Step 2) | ||
| 122 | DH, Step 6) | ||
| 123 | DH, Step 3) | ||
| 158 | DC, Step 15) | ||
| 159 | DC, Step 1) | ||
| 214 | DR, Step 1) | ||
| 218 | N, Step 1) | ||
| 222 | N, Step 1) | ||
| 226 | N, Step 2) | ||
| 327 | DL, Step 1) | ||
| 335 | DL, Step 8) | ||
| 336 | DL, Step 25) or 31) | ||
| 337 | DL, Step 25) or 31) | ||
| 341 | KP, Step 1) | ||
| 511 | (1) * | ||
| 513 | (1) * | ||
| 522 | TA, Step 1) | ||
| 525 | TA, Step 1) | ||
| 539 | KM, Step 13) | ||
| 542 | J, Step 6) | ||
| 543 | J, Step 11) | ||
| 556 | J, Step 1) | ||
| 558 | DL, Step 11) | ||
| 565 | KB, Step 1) | ||
| 621 | TB, Step 1) | ||
| 622 | TB, Step 1) | ||
| 626 | TB, Step 1) | ||
| 627 | TB, Step 1) | ||
| 629 | TB, Step 1) | ||
| 641 | TB, Step 1) | ||
| 652 | TB, Step 1) | ||
| 998 | Failure Mode Effects Management | ||
| No Codes Or Codes Not Listed | QA, Step 1) | ||
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