Mazda 2006 MX-5 - Koeo;Koer Self-Test [Lf]; KOEO (Key ON, Engine Off) Self-Test; KOER (Key ON, Engine Running) Self-Test

ON-BOARD DIAGNOSTIC
01–02–20
KOEO/KOER SELF-TEST [LF]
E5U010200000N04
• 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
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 turned
to the ON position 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 the inspection for 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 turned
to the ON position 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 the inspection for set DTCs and if a malfunction is
detected the DTC is displayed on the WDS or equivalent.
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 — ×
P0016 CKP-CMP correlation — —
P0030 Front HO2S heater control circuit problem ××
P0031 Front HO2S heater circuit low input ××
P0032 Front HO2S heater circuit high input ××
P0037 Rear HO2S heater circuit low input ××
P0038 Rear 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 ××
P0116 Engine coolant temperature circuit range/performance — —
P0117 ECT sensor circuit low input ××
P0118 ECT sensor circuit high input ××
P0122 TP sensor No.1 circuit low input ××
P0123 TP sensor No.1 circuit high input ××
P0125 Excessive time to enter closed loop fuel control — —
P0126
Coolant thermostat stuck open
——
P0128 ——
P0130 Front HO2S circuit problem ××
P0131 Front HO2S circuit low input ××
P0132 Front HO2S circuit high input ××
P0133 Front HO2S circuit problem — —
P0134 Front HO2S no activity detected — ×
P0137 Rear HO2S circuit low input ××
P0138 Rear HO2S circuit high input ××