KOEO/KOER SELF-TEST [WITH 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

C1277
Steering angle sensor circuit malfunction
-
-
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
×
×
P0107*3
MAP circuit low input
×
×
P0108*3
MAP 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*4
Fuel trim system too lean
-
-
P0172*4
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
-
×
P0401*3
EGR flow insufficient detected
-
×
P0403*3
EGR control circuit problem
×
×
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*1
Vehicle speed sensor (VSS) circuit malfunction
-
-
P0500*2
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
×
×
P0706*2
Transaxle range (TR) switch circuit range/performance
-
-
P0707*2
Transaxle range (TR) switch circuit low input
×
×
P0708*2
Transaxle range (TR) switch circuit high input
×
×
P0711*2
Transaxle fluid temperature (TFT) sensor circuit range/performance (Stuck)
-
-
P0712*2
Transaxle fluid temperature (TFT) sensor circuit range/performance (short to ground)
×
×
P0713*2
Transaxle fluid temperature (TFT) sensor circuit range/performance (open circuit)
×
×
P0715*2
Input/turbine speed sensor circuit malfunction
-
-
P0731*2
Gear 1 incorrect (incorrect gear ratio detected)
-
-
P0732*2
Gear 2 incorrect (incorrect gear ratio detected)
-
-
P0733*2
Gear 3 incorrect (incorrect gear ratio detected)
-
-
P0734*2
Gear 4 incorrect (incorrect gear ratio detected)
-
-
P0741*2
Torque converter clutch (TCC) (stuck OFF)
-
-
P0742*2
Torque converter clutch (TCC) (stuck ON)
-
-
P0745*2
Pressure control solenoid malfunction
×
×
P0751*2
Shift solenoid A stuck OFF
-
-
P0752*2
Shift solenoid A stuck ON
-
-
P0753*2
Shift solenoid A malfunction (electrical)
×
×
P0756*2
Shift solenoid B stuck OFF
-
-
P0757*2
Shift solenoid B stuck ON
-
-
P0758*2
Shift solenoid B malfunction (electrical)
×
×
P0761*2
Shift solenoid C stuck OFF
-
-
P0762*2
Shift solenoid C stuck ON
-
-
P0763*2
Shift solenoid C malfunction (electrical)
×
×
P0766*2
Shift solenoid D stuck OFF
-
-
P0767*2
Shift solenoid D stuck ON
-
-
P0768*2
Shift solenoid D malfunction (electrical)
×
×
P0771*2
Shift solenoid E stuck OFF
-
-
P0772*2
Shift solenoid E stuck ON
-
-
P0773*2
Shift solenoid E malfunction (electrical)
×
×
P0894*2
Forward clutch torque transmission
-
-
P1384
Variable valve timing control system malfunction
-
×
P1562
PCM +BB (back-up battery) voltage low
×
×
P2008
VTCS shutter valve actuator control circuit malfunction
×
×
P2177*3
System too lean off idle
-
×
P2178*3
System too rich off idle
-
×
P2187*3
System too lean at idle
-
×
P2188*3
System too rich at idle
-
×
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
×
×
*1 :
MTX
*2 :
ATX
*3 :
With EGR system
*4 :
Without EGR system