Mazda 2006 MX-5 Service Highlights page 32

P0108 MAP sensor circuit high input
• The PCM monitors the input voltage from the MAP sensor when intake air temperature is above –10 °C {14
°F}. If input the voltage is above 4.92 V, the PCM determines that the MAP sensor circuit has a malfunction.
MONITORING CONDITIONS
— Calculated load: 13—32 %
P0111 IAT sensor circuit range/performance problem
• If intake air temperature is higher than engine coolant temperature by 18 °C {32.4 °F} for 1.2 s with ignition
*
switch on , the PCM determines that there is a intake air temperature sensor circuit range/performance
problem.
*: Ignition switch on when 6 h or more has passed since the previous ignition switch off
P0112 IAT sensor circuit low input
• The PCM monitors the IAT sensor signal. If the PCM detects that the IAT sensor voltage is below 0.16 V, the
PCM determines that the IAT sensor circuit has a malfunction.
P0113 IAT sensor circuit high input
• The PCM monitors the IAT sensor signal. If the PCM detects that the IAT sensor voltage is above 4.84 V, the
PCM determines that IAT sensor circuit has a malfunction.
P0116 Engine coolant temperature circuit range/performance
• The PCM monitors the maximum value and minimum value of engine coolant temperature when the engine is
started and 5 min have been passed after leaving the vehicle 6 h or more. If difference between maximum and
minimum values of engine coolant temperature is below 6 °C {10.8 °F} the PCM determines that there is an
ECT circuit range/performance problem.
P0117 ECT sensor circuit low input
• The PCM monitors the ECT sensor signal at PCM terminal 2AH. If the PCM detects the ECT sensor voltage
below 0.2 V, the PCM determines that the ECT sensor circuit has malfunction.
P0118 ECT sensor circuit high input
• The PCM monitors the ECT sensor signal at PCM terminal 2AH. If the PCM detects the ECT sensor voltage is
above 4.58 V, the PCM determines that the ECT sensor circuit has malfunction.
P0122 TP sensor No.1 circuit low input
• If the PCM detects that the TP sensor No.1 voltage is below 0.1 V while the engine is running, the PCM
determines that the TP sensor No.1 circuit has a malfunction.
P0123 TP sensor No.1 circuit high input
• If the PCM detects the TP sensor No.1 voltage is to be above 4.9 V after ignition switch to the ON position,
PCM determines that TP sensor No.1 circuit has a malfunction.
P0125 Excessive time to enter closed loop fuel control
• The PCM monitors the ECT sensor signal at PCM terminal 2AK after engine is started while the engine is cold.
If the engine coolant temperature does not reach the expected temperature for specified period, the PCM
determines that it has taken an excessive amount of time for the engine coolant temperature to reach the
temperature necessary to start closed-loop fuel control.
P0126 Coolant thermostat stuck open
• If the ECT signal never exceeds 71 °C {160 °F} after engine start for specified period, PCM determines that the
coolant thermostat is stuck open.
MONITORING CONDITIONS
— IAT: above –10 °C {14 °F}
— Vehicle speed: over 6 km/h {3.7 mph}
P0128 Coolant thermostat stuck open
• PCM monitors MAF, IAT, VSS and EAT signals and calculate radiator's heat radiation ratio while following
monitoring conditions are met. If calculated value exceeds threshold, PCM determines that the coolant
thermostat is stuck open.
MONITORING CONDITIONS
— IAT: above –10°C {14 °F}
— ECT at engine start: Below 36 °C {97 °F}
— Difference between ECT at engine start and minimum IAT: Below 6 °C {10.8 °F}
— Vehicle speed: over 30 km/h {18.6 mph}
P0130 Front HO2S circuit problem
• The PCM monitors the front HO2S impedance when under the front HO2S heater control. If the impedance is
more than 500 ohms, the PCM determines that there is a front HO2S circuit problem.
P0131 Front HO2S circuit low input
• The PCM monitors the input voltage from the front HO2S and the front HO2S output current when the engine is
running. If the input voltage is less than 1.8 V or the output current is less than –5 mA, the PCM determines
that the front HO2S circuit voltage is low.
P0132 Front HO2S circuit high input
• The PCM monitors the input voltage from the front HO2S and the front HO2S output current when the engine is
running. If the input voltage is more than 3.8 V or the output current is more than 5 mA, the PCM determines
that the front HO2S circuit voltage is high.
01–02–12
ON-BOARD DIAGNOSTIC