Mazda 2007 CX-9, Service Highlights

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ON-BOARD DIAGNOSTIC
07-02–2
ON-BOARD DIAGNOSTIC FUNCTION
id070200100300
Malfunction detection function
•
Detects errors in the input and output signals. (The ignition switch is at the ON position or the engine is
running.)
•
If a malfunction is detected, a DTC is output to the check connector through the malfunction display function. At
the same time, malfunction detection results are sent to the fail-safe and memory functions.
Fail-safe function
•
If a malfunction is detected by the malfunction detection function and a malfunction is determined, the following
controls are performed to prevent an operating malfunction of the full-auto air conditioner and malfunction of
output parts.
Fail-safe Function Table
Memory Function
•
Stores the signal determined to be malfunctioning by the malfunction detection function, and the memory is not
cleared even if the ignition switch is turned off (LOCK position) or the malfunction has been repaired.
•
To clear stored malfunction information, press the front climate control unit AUTO switch and REC switch
simultaneously during past malfunction display mode.
Display Function
•
Function for outputting present or past malfunction to the information display as DTCs.
Present Malfunction Display Mode
•
Presently occurring malfunctions (open/short circuits) are detected and the DTCs are indicated on the
information display.
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
25
°
C {77
°
F} .
←
Ambient temperature
sensor
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 0 W/m
2
.
←
Engine coolant temperature
sensor
Engine coolant temperature sensor input value
is fixed at
80
°
C {176
°
F} .
←
Rear airflow volume control
(Rear control switch on)
Until a malfunction is detected, perform manual
control using the normal value that was last
detected. During malfunction determination, the
rear airflow amount is controlled based on the
rear target temperature calculated from the set
temperature of the rear temperature setting dial.
←
Rear airflow temperature
control
(Rear control switch on)
Until a malfunction is detected, perform control
using the normal value that was last detected.
During malfunction determination, the rear
temperature setting is controlled at
22
°
C {72
°
F}
←
Air mix actuator
(potentiometer)
Air mix actuator drive signal is stopped right
when the malfunction is determined.
←
Airflow mode actuator
(potentiometer)
Airflow mode actuator drive signal is stopped
right when the malfunction is determined.
←
Air mix actuator
(motor lock)
Air mix actuator drive signal is stopped right
when the malfunction is determined. After the IG SW is at ON, the air mix actuator
drive signal is again output normally.
Airflow mode actuator
(motor lock)
Airflow mode actuator drive signal is stopped
right when the malfunction is determined. After the IG SW is at ON, the airflow mode
actuator drive signal is again output normally.
3423-1U-06H(07-02).fm 2 ページ ２００６年１１月２１日 火曜日 午後５時２２分