Mazda 5 2007 - Dtc Detection Logic and Conditions[Lf]

ON-BOARD DIAGNOSTIC [LF]
01-02–8
2-drive cycle type
• The code for a failed system is stored in the PCM memory in the first drive cycle. If the problem is not found in
the second drive cycle, the PCM determines that the system returned to normal or the problem was mistakenly
detected, and deletes the pending code when the ignition switch is turned to the ON position in the next drive
cycle. If the problem is found in the second drive cycle too, the PCM determines that the system has failed, and
stores the pending codes, and the DTCs.
• After pending codes are stored, if the PCM determines that the system is normal in any future drive cycle, the
PCM deletes the pending codes.
DLC-2 Outline
• The DLC-2 located in the driver compartment is a service connector defined by OBD-II regulations.
• The following are functions for each terminal.
End Of Sie
DTC DETECTION LOGIC AND CONDITIONS[LF]
id010245100300
B1342 PCM malfunction
• Malfunction in the PCM internal circuit.
P0011 CMP Timing over-advanced
• The actual valve timing is over-advanced by 15 ° from the target valve timing for specified period when the oil
control valve (OCV) is controlled in the maximum valve timing retard condition.
Monitoring condition
— Engine coolant temperature is above 63 °C {145.4 °F}
P0012 CMP timing over-retarded
• Actual valve timing is over-retarded by 10 ° from the target valve timing for specified period when the oil control
valve (OCV) system control is within the feedback range.
Monitoring condition
— Engine coolant temperature is above 63 °C {145.4 °F}
P0016 CKP-CMP correlation
• The PCM monitors the input pulses from the CKP sensor and CMP sensor. If the input pulse pick-up timing do
not match each other, the PCM determines that the camshaft position does not coincide with the crankshaft
position.
P0030 Front HO2S heater control circuit problem
• The PCM monitors the front HO2S impedance when under the front HO2S heater control for 200 s. If the
impedance is more than 44 ohms, the PCM determines that there is a front HO2S heater control circuit
problem.
P0031 Front HO2S heater circuit low input
• The PCM monitors the front HO2S heater control voltage when the PCM turns the front HO2S heater off. If the
control voltage exceeds 50% of the battery voltage, the PCM determines that the front HO2S heater control
circuit voltage is low.
P0032 Front HO2S heater circuit high input
• The PCM monitors the front HO2S heater control voltage when the PCM turns the front HO2S heater on. If the
control voltage is less than 50% of the battery voltage, the PCM determines that the front HO2S heater control
circuit voltage is high.
P0037 Rear HO2S heater circuit low input
• The PCM monitors the rear HO2S heater control voltage when the PCM turns the rear HO2S heater off. If the
control voltage exceeds 25% of the battery voltage, the PCM determines that the rear HO2S heater control
circuit voltage is low.
P0038 Rear HO2S heater circuit high input
• The PCM monitors the rear HO2S heater control voltage when the PCM turns the rear HO2S heater on. If the
control voltage is less than 57% of the battery voltage, the PCM determines that the rear HO2S heater control
circuit voltage is high.
Terminal name Function
B+ Battery positive voltage
CAN_L Serial communication Lo terminal
CAN_H Serial communication Hi terminal
GND1 Ground (chassis)
GND2 Ground (signal)
B+ CAN_L
GND1CAN_H GND2
DLC-2
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