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KOEO/KOER SELF-TEST [WITHOUT WU-TWC]

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• The self-test function consists of the KOEO (Key On, Engine Off) self-test, performed when the ignition switch is at ON, and the KOER (Key On, Engine Running) self-test, performed when idling. If any irregularity is detected when either self-test is executed, a DTC is displayed on the WDS or equivalent. Using the self-test function, the present malfunction or a successful repair is readily confirmed. Refer to the self-test function table for the corresponding DTCs.
KOEO (Key ON, Engine Off) self-test

  - The KOEO self-test is a powertrain control system self-diagnosis, performed when the ignition switch is at ON and the engine is stopped. A KOEO self-test begins when the connected WDS or equivalent sends an execute command to the PCM.
  - As the KOEO self-test is performed, the PCM performs inspection for the set DTCs and if a malfunction is detected the DTC is displayed on the WDS or equivalent.

KOER (Key ON, Engine Running) self-test

  - The KOER self-test is a powertrain control system self-diagnosis, performed when the ignition switch is at ON and the engine is idling. A KOER self-test begins when the connected WDS or equivalent sends an execute command to the PCM.
  - As the KOER self-test is performed, the PCM performs inspection for the set DTCs and if a malfunction is detected the DTC is displayed on the WDS or equivalent.

DTC table

×: Applicable
-: Not applicable

DTC No. | Condition | KOEO | KOER
--- | --- | --- | ---
P0010 | CMP actuator circuit malfunction | × | ×
P0011 | CMP timing over-advanced | - | ×
P0012 | CMP timing over-retarded | - | ×
P0031 | HO2S heater circuit low input | × | ×
P0032 | HO2S heater circuit high input | × | ×
P0102 | MAF circuit low input | × | ×
P0103 | MAF circuit high input | × | ×
P0112 | IAT circuit low input | × | ×
P0113 | IAT circuit high input | × | ×
P0117 | ECT circuit low input | × | ×
P0118 | ECT circuit high input | × | ×
P0122 | TP circuit low input | × | ×
P0123 | TP circuit high input | × | ×
P0131 | HO2S no inversion (stuck low) | - | -
P0132 | HO2S no inversion (stuck high) | - | ×
P0134 | HO2S circuit no activity detected | - | ×
P0171 | Fuel trim system too lean | - | ×
P0172 | Fuel trim system too rich | - | ×
P0327 | Knock sensor circuit low input | × | ×
P0328 | Knock sensor circuit high input | × | ×
P0335 | CKP sensor circuit malfunction | - | -
P0340 | CMP sensor circuit malfunction | - | -
P0351 | Ignition coil No.1 control circuit malfunction | - | ×
P0352 | Ignition coil No.2 control circuit malfunction | - | ×
P0353 | Ignition coil No.3 control circuit malfunction | - | ×
P0354 | Ignition coil No.4 control circuit malfunction | - | ×
P0443 | Evaporative emission control system purge control valve circuit malfunction | × | ×
P0480 | Cooling fan relay No.1 control circuit malfunction | × | ×
P0481 | Cooling fan relay No.2 control circuit malfunction | × | ×
P0500 | Vehicle speed sensor (VSS) circuit malfunction | - | -
P0500 | Vehicle speed sensor (VSS) circuit malfunction | - | -
P0505 | Idle control system malfunction | - | ×
P0511 | Idle control system circuit malfunction | × | ×
P0537 | Evaporator temperature sensor circuit low input | × | ×
P0538 | Evaporator temperature sensor circuit high input | × | ×
P0602 | PCM programming error | × | ×
P0610 | Control module vehicle options error | × | ×
P0660 | VIS shutter valve actuator control circuit malfunction | × | ×
P0668 | PCM temperature sensor circuit low input | × | ×
P0669 | PCM temperature sensor circuit high input | × | ×
P1384 | Variable valve timing control system malfunction | - | ×
P1562 | PCM +BB (back-up battery) voltage low | × | ×
P2008 | VTCS shutter valve actuator control circuit malfunction | × | ×
P2502 | Generator terminal B circuit open | - | ×
P2503 | Generator output voltage signal no electricity | - | ×
P2504 | Battery overcharge | - | ×
U0073 | CAN bus off | × | ×
U0121 | PCM cannot receive any signals from ABS HU/CM | × | ×
U0155 | PCM cannot receive any signals from instrument cluster | × | ×