KOEO/KOER SELF-TEST [LF, L3]


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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.

KOEO/KOER self-test function 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
Front HO2S heater circuit low
×
×
P0032
Front HO2S heater circuit high
×
×
P0037
Rear HO2S heater circuit low
×
×
P0038
Rear HO2S heater circuit high
×
×
P0102
MAF circuit low input
×
×
P0103
MAF circuit high input
×
×
P0107
MAP sensor circuit low input
×
×
P0108
MAP sensor 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
Front HO2S no inversion (low stuck)
-
-
P0132
Front HO2S no inversion (high stuck)
-
×
P0134
Front HO2S circuit no activity detected
-
×
P0138
Rear HO2S circuit high input
-
-
P0140
Rear 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 circuit malfunction
-
×
P0352
Ignition coil No.1 circuit malfunction
-
×
P0401
EGR flow insufficient detected
-
×
P0402
EGR flow excessive detected
-
-
P0403
EGR valve motor coils open or short
×
×
P0443
Evaporative emission control system purge control valve circuit malfunction
-
×
P0480
Fan relay control circuit malfunction
×
×
P0500
Vehicle speed sensor (VSS) circuit malfunction
-
-
P0505
Idle control system malfunction
-
×
P0511
IAC valve circuit malfunction
×
×
P0602
PCM programming error
×
×
P0610
Control module vehicle options error
×
×
P0661
VIS control circuit low input
×
×
P0662
VIS control circuit high input
×
×
P1410
Variable air duct valve circuit malfunction
×
×
P1562
PCM +BB voltage low
×
×
P2009
Variable tumble control solenoid circuit low input
×
×
P2010
Variable tumble control solenoid circuit high input
×
×
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, ABS/TCS or DSC HU/CM
×
×
U0155
PCM cannot receive any signals from combination meter
×
×