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 turned to the ON position and the engine is stopped; and the KOER (Key On, Engine Running) self-test, performed when idling. If a malfunction is detected when either self-test is executed, a DTC is displayed on the M-MDS. 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 turned to the ON position and the engine is stopped. A KOEO self-test begins when the connected M-MDS sends an execute command to the PCM.
•  As the KOEO self-test is performed, the PCM performs the inspection for set DTCs and if a malfunction is detected the DTC is displayed on the M-MDS.

KOER (Key ON, Engine Running) Self-test

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

KOEO/KOER self-test table

×: Applicable
—: Not applicable

DTC No.

Condition

Test condition

KOEO

KOER

B1342
PCM malfunction
×
P0011
CMP timing over-advanced
×
P0012
CMP timing over-retarded
×
P0030
A/F sensor heater control circuit problem
×
×
P0031
A/F sensor heater circuit low input
×
×
P0032
A/F sensor heater circuit high input
×
×
P0037
HO2S heater circuit low input
×
×
P0038
HO2S heater circuit high input
×
×
P0069
Manifold absolute pressure/atmospheric pressure correlation
P0101
MAF sensor circuit range/performance problem
P0102
MAF sensor circuit low input
×
×
P0103
MAF sensor circuit high input
×
×
P0107
MAP sensor circuit low input
×
×
P0108
MAP sensor circuit high input
×
×
P0111
IAT sensor circuit range/performance problem
P0112
IAT sensor circuit low input
×
×
P0113
IAT sensor circuit high input
×
×
P0117
ECT sensor circuit low input
×
×
P0118
ECT sensor circuit high input
×
×
P0122
TP sensor circuit low input
×
×
P0123
TP sensor circuit high input
×
×
P0125
Excessive time to enter closed loop fuel control
P0131
A/F sensor circuit low input
×
×
P0132
A/F sensor circuit high input
×
×
P0133
A/F sensor circuit problem
P0134
A/F sensor no activity detected
×
P0137
HO2S circuit low input
×
×
P0138
HO2S circuit high input
×
×
P0140
HO2S no activity detected
×
P0222
TP sensor No.2 circuit low input
×
×
P0223
TP sensor No.2 circuit high input
×
×
P0300
Random misfire detected
×
P0301
Cylinder No.1 misfire detected
×
P0302
Cylinder No.2 misfire detected
×
P0303
Cylinder No.3 misfire detected
×
P0304
Cylinder No.4 misfire detected
×
P0327
KS circuit low input
×
×
P0328
KS circuit high input
×
×
P0335
CKP sensor circuit problem
P0340
CMP sensor circuit problem
P0403
EGR valve (stepper motor) circuit problem
×
×
P0421
Warm up catalyst system efficiency below threshold
P0443
Purge solenoid valve circuit problem
×
×
P0480
Cooling fan control circuit problem
×
×
P0500
VSS circuit problem
P0505
IAC system problem
×
P0506
Idle control system RPM lower than expected
P0507
Idle control system RPM higher than expected
P0564
Cruise control switch circuit malfunction
P0571
Brake switch circuit problem
P0601
PCM memory check sum error
×
×
P0602
PCM programming error
×
×
P0604
PCM RAM error
×
×
P0606
ECM/PCM processor
×
×
P0607
PCM performance problem
×
×
P0610
PCM vehicle options error
×
×
P0638
Throttle actuator control range/performance problem
P0661
Variable intake-air solenoid valve circuit low input
×
×
P0662
Variable intake-air solenoid valve circuit high input
×
×
P0703
Brake switch input circuit problem
P0704
CPP switch input circuit problem
P0850
Neutral switch input circuit problem
P1260
Immobilizer system problem
×
P2009
Variable tumble solenoid valve circuit low input
×
×
P2010
Variable tumble solenoid valve circuit high input
×
×
P2088
Oil control valve (OCV) circuit low
×
×
P2089
Oil control valve (OCV) circuit high
×
×
P2096
Target A/F feedback system too lean
P2097
Target A/F feedback system too rich
P2100
Throttle actuator circuit range/performance
×
×
P2101
Throttle actuator circuit range/performance
×
P2102
Throttle actuator circuit low input
×
×
P2103
Throttle actuator circuit high input
×
×
P2107
Throttle actuator control module processor error
×
P2108
Throttle actuator control module performance error
×
P2119
Throttle actuator control throttle body range/performance problem
×
P2122
Accelerator pedal position (APP) sensor No.1 circuit low input
×
×
P2123
Accelerator pedal position (APP) sensor No.1 circuit high input
×
×
P2126
Accelerator pedal position (APP) sensor No.2 circuit range/performance problem
×
×
P2127
Accelerator pedal position (APP) sensor No.2 circuit low input
×
×
P2128
Accelerator pedal position (APP) sensor No.2 circuit high input
×
×
P2135
Throttle position sensor No.1/No.2 voltage problem
×
×
P2138
Accelerator pedal position (APP) sensor No.1/No.2 voltage problem
×
×
P2177
Fuel system too lean at off idle
×
P2178
Fuel system too rich at off idle
×
P2187
Fuel system too lean at idle
×
P2188
Fuel system too rich at idle
×
P2195
A/F sensor signal stuck lean
P2196
A/F sensor signal stuck rich
P2228
BARO sensor circuit low input
×
×
P2229
BARO sensor circuit high input
×
×
P2237
A/F sensor positive current control circuit open
×
×
P2251
A/F sensor negative current control circuit open
×
×
P2502
Charging system voltage problem
×
P2503
Charging system voltage low
×
P2504
Charging system voltage high
×
P2507
PCM B+ voltage low
×
×