Mazda B-Series 1997 Workshop Manual page 520

CONTROL SYSTEM (FOR 3 . 0 ~ )
FT
/
Terminal Connected To Test Condition
1
Specification Remark
Key ON
Possible Cause
Mass air flow (MAF)
j
1 . 1 ~ Open or short circuit from
sensor
48 kmlh (30 mph)
j
0.8-1.8V
-
- 1
MAF to PCM.
1
Driving 88 kmlh (55 mph)
1
I . ! % - 2 . 5 V -
Hot idle 0.9V
- -
Open or short circuit from
Driving 48 kmlh (30 mph) 0 9-1.3V TP to PCM.
Drivinq 88 kmlh (55 mph) 1 1-26V
(Input)
(Output)
(Input)
Throttle position (TP)
sensor
5V Open or short VREF
from PCM.
O V PC;M malfunction.
Key ON
Vehicle reference
voltage (VREF)
1
Key OFF
I
ov
I
- /
Sianal return
I
Constant
I
Open circuit.
Open or short circuit
from
BOO
to PCM.
/
Brake OnIOff (BOO)
i
Brake-Pedal depressed
1
1
switch
!
Brake pedal released
I
Key ON
1
Heated oxygen
B+
1
' ' ' ' P , ; ;
open or shortcircuit
'
sensor-11 (FRT.RT.)
Engine running at normal
from sensor to PCM.
operating temperature
0.3V Contaminated sensor.
I
I
Key ON
Heated oxygen
Open or short circuit from
sensor-21 (FRT.LT)
I
Engine running at normal sensor to PCM.
I
operating temperature Contaminated sensor
i
Key ON
Heated oxygen ' I D OFF Open or short circuit from
sensor-1 2 (rear)
sensor to PCM
I
operating temperature
0 2V PID ON Contaminated sensor.
(Input)
(Output)
F
Vehicle power
Key ON
- -
Key OFF
-4
Open or short circuit from
1 -
sensor to PCM.
lnjector #6
Key ON
-
I
Hot idle 4.1 4 . 3 msec Open or short circuit
from injector #6 to PCM
a -
Injector #4
/
Key C)N
I
B+
-
Hot idle 4.1-4.3 nisec -
+
- -
,
Open or short circuit
Drivinq 48 kmlh (30 mph) 5.9--6.7 msec - from injector #4 to PCM
100
(Output)
--I
Driving 88 kmlh (55 mph)-81--nsec
-
/
Key ON
I
B+
I
-
1
4.1-4.3 msec
1
Hot idle
1 1
I
1
Open or short circuit
Driving 48 kmlh (30 mph) 5.9-6.7 msec
from injector #2 to PCM (Output)
Injector #2
/
Driving 88 kmlh (55 mph)
1
8.1-12.2 msec
/
-
1
Power ground Constant
I
OV
Power connection at PCM.
Open circuit.