ON-BOARD DIAGNOSTIC FUNCTION
id070200100300
Malfunction detection function
Fail-safe function
Fail-safe Function Table
|
Part where malfunction is determined |
Malfunction determined when IG SW at ON |
Malfunction already exists when IG SW turned to ON |
|---|---|---|
|
Cabin temperature sensor
|
Cabin temperature sensor input value is fixed at the value right before the malfunction.
|
Cabin temperature sensor input value is fixed at 25 °C {77 °F}.
|
|
Ambient temperature sensor
|
Ambient temperature sensor input value is fixed at the value right before the malfunction.
|
Ambient temperature sensor input value is fixed at 15 °C {59 °F}.
|
|
Evaporator temperature sensor
|
Evaporator temperature sensor input value is fixed at 0 °C {32 °F}.
|
←
|
|
Solar radiation sensor
|
Solar radiation sensor value is fixed at the value right before the malfunction.
|
Solar radiation sensor value is fixed at 0 W/m2.
|
|
Engine coolant temperature sensor
|
Engine coolant temperature sensor input value is fixed at 85 °C {185 °F}.
|
←
|
|
Air mix actuator
(potentiometer)
|
Air mix actuator drive signal is stopped right when the malfunction is determined.
However, it is fixed at MAX COLD when the manually set temperature is at 15*1/18*2 and fixed at MAX HOT when the manually set temperature is at 29*1/32*2.
|
Control based on ambient temperature. (See Graph 1.)
However, it is fixed at MAX COLD when the manually set temperature is at 15*1/18*2 and fixed at MAX HOT when the manually set temperature is at 29*1/32*2.
|
|
Airflow mode actuator
(potentiometer)
|
Airflow mode actuator drive signal is stopped right when the malfunction is determined.
• However, for manual operation using the MODE switch, only vent mode is operable.
• The defroster switch is operable.
|
Control based on ambient temperature. (See Graph 2.)
• However, for manual operation using the MODE switch, only vent mode is operable.
• The defroster switch is operable.
|
|
Air mix actuator
(motor lock)
|
Air mix actuator drive signal is stopped right when the malfunction is determined. After this, a drive signal is output to the air mix actuator and malfunction determination is performed approx. every 5 min.
|
After the IG SW is at ON, the air mix actuator drive signal is again output normally. After this, a drive signal is output to the air mix actuator and malfunction determination is performed approx. every 5 min.
|
|
Airflow mode actuator
(motor lock)
|
Airflow mode actuator drive signal is stopped right when the malfunction is determined. After this, a drive signal is output to the airflow mode actuator and malfunction determination is performed approx. every 5 min.
|
After the IG SW is at ON, the airflow mode actuator drive signal is again output normally. After this, a drive signal is output to the airflow mode actuator and malfunction determination is performed approx. every 5 min.
|
acxuun00000222
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Sensor Signal Delay Function
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|
Memory Function
Display Function
DTC Table
|
DTC |
Malfunction location |
Detected condition |
Memory function |
|---|---|---|---|
|
B1251
|
Cabin temperature sensor
|
Cabin temperature sensor circuit open
|
X
|
|
B1253
|
Cabin temperature sensor circuit short (body ground)
|
X
|
|
|
B1255
|
Ambient temperature sensor
|
Ambient temperature sensor circuit open
|
X
|
|
B1257
|
Ambient temperature sensor circuit short (body ground)
|
X
|
|
|
B1260
|
Solar radiation sensor
|
Solar radiation sensor circuit short (power supply)
|
X
|
|
B1261
|
Solar radiation sensor circuit short (body ground)
|
—
|
|
|
B1274
|
Airflow mode actuator (potentiometer)
|
Airflow mode actuator (potentiometer) circuit short (power supply)
|
X
|
|
B1275
|
Airflow mode actuator (potentiometer) circuit short (body ground)
|
X
|
|
|
B1282
|
Air mix actuator (potentiometer)
|
Air mix actuator (potentiometer) circuit short (power supply)
|
X
|
|
B1283
|
Air mix actuator (potentiometer) circuit short (body ground)
|
X
|
|
|
B1947
|
Evaporator temperature sensor
|
Evaporator temperature sensor circuit short (body ground)
|
X
|
|
B2014
|
Evaporator temperature sensor circuit open
|
X
|
|
|
B2832
|
Airflow mode actuator (motor lock)
|
Airflow mode actuator motor lock
|
X
|
|
B2834
|
Air mix actuator (motor lock)
|
Air mix actuator motor lock
|
X
|
|
U0155
|
CAN communication system
|
Reception error in signal from ICM (HEC)
|
X
|
|
U0516
|
BUS OFF error
|
X
|
PID/data Monitor Table
|
PID name (definition) |
Unit/Condition |
Operation Condition (Reference) |
|---|---|---|
|
DTC_CNT
(Number of continuous DTCs)
|
―
|
Indicates number of DTC
|
Active Command Modes Table
|
Command name |
Output part |
Operation |
Operating condition |
|---|---|---|---|
|
MIX_ACT
|
Air Mix Actuator
|
On/Off
|
Ignition switch at ON
|
|
REC/FRESH
|
REC/FRESH Switch
|
||
|
DISPLAY
|
Information Display
|
||
|
BLOWER
|
Blower Motor
|
||
|
MODE_ACT
|
Airflow Mode Actuator
|
A/C Operation Check Mode
|
Mazda modular diagnostic system (M-MDS) display |
Target part |
Operation condition |
|---|---|---|
|
Illumination Of All Indicator lights
|
Climate control unit
|
All A/C indicator lights illuminated
|
|
Blower Motor Speed
|
Blower motor
|
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|
Air mix Actuator
|
Air mix door
|
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|
Airflow Mode Actuator
|
Airflow mode door
|
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|
Air Intake Actuator / Air conditioning compressor
|
Air intake door
A/C compressor
|
FRESH Û REC
ON Û OFF
|