KOER Self-Test
1) DO NOT enter this test sequence until a Code 111 (pass code) has been retrieved in KOEO SELF-TEST. If system has not passed KOEO SELF-TEST, code recorded in KOER SELF-TEST may not be valid.
2) Deactivate self-test by removing and reconnecting jumper wire, or by procedure specified by test equipment in use. Start engine, and run it for 2 minutes at 2000 RPM to warm-up Heated Oxygen Sensor (HO2S). Turn engine off, and wait 10 seconds. Activate KOER SELF-TEST using a jumper wire or appropriate procedure for test equipment used. Start engine. Record all service codes displayed.
Check following items:
* If engine starts and stalls, or stalls during self-test, go to CIRCUIT TEST S.
* If vehicle is equipped with a Brake On-Off (BOO) switch, brake pedal must be depressed and released after ID code portion of test.
* When Dynamic Response Code appears, perform a brief Wide Open Throttle (WOT). DO NOT perform WOT unless requested.
* If Code 998 is displayed, EEC-IV system is operating in Failure Management Effects Mode (FMEM). Vehicle has not passed KOEO SELF-TEST and cannot be diagnosed while in FMEM mode. Rerun KOEO SELF-TEST.
* If KOER codes are present, refer to appropriate CIRCUIT TEST listed in KOER SELF-TEST CODE REFERENCE table. If system will not output codes, go to CIRCUIT TEST QA.
| Service Code | Circuit Test & Step No. | ||
|---|---|---|---|
| 114 | DA, Step 1) | ||
| 116 | DA, Step 1) | ||
| 121 | DH, Step 2) | ||
| 129 | DC, Step 7) | ||
| 136 | H, Step 1) | ||
| 137 | H, Step 1) | ||
| 159 | DC, Step 1) | ||
| 167 | DH, Step 10) | ||
| 172 | H, Step 1) | ||
| 173 | H, Step 1) | ||
| 213 | P, Step 1) | ||
| 327 | DL, Step 15) | ||
| 332 | DL, Step 18) | ||
| 337 | DL, Step 21) | ||
| 411 | KE, Step 13) | ||
| 412 | KE, Step 1) | ||
| 511 | (1) * | ||
| 513 | (1) * | ||
| 536 | FD, Step 1) | ||
| 538 | M, Step 1) | ||
| 539 | KM, Step 13) | ||
| 565 | KD, Step 6) | ||
| 632 | TB, Step 2) | ||
| No Codes Or Codes Not Listed | QA, Step 1) | ||
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